Diagram sections — 29 (53 total)
AIR CONDITIONING ANTI-LOCK BRAKES ANTI-THEFT COMPUTER DATA LINES COOLING FAN CRUISE CONTROL DEFOGGERS ELECTRONIC POWER STEERING ELECTRONIC SUSPENSION ENGINE PERFORMANCE EXTERIOR LIGHTS GROUND DISTRIBUTION HEADLIGHTS HORN INSTRUMENT CLUSTER INTERIOR LIGHTS POWER DISTRIBUTION POWER DOOR LOCKS POWER MIRRORS POWER SEATS POWER WINDOWS RADIO SHIFT INTERLOCKS STARTING/CHARGING SUPPLEMENTAL RESTRAINTS TRANSMISSION TRUNK, TAILGATE, FUEL DOOR WARNING SYSTEMS WIPER/WASHER
AIR CONDITIONING Automatic A/C Wiring Diagram for Mercury Grand Marquis LS 2001 List of elements for Automatic A/C Wiring Diagram for Mercury Grand Marquis LS 2001: 71 (behind right kick panel, near door sill) g203 (front of right front fender apron, right side of battery) g111 (in 12a581 harness, near breakout to 12 pin in-line connector, left rear corner of engine compartment, rear of wheelwell) (in 14401 harness, near breakout to glove box lamp) (in 14401 harness, near breakout to gray in-line connector, lower right side of steering column, on connector bracket) s226 (not used) 87a A/c clutch cycling pressure switch (in right rear of engine compartment, on a/c accumulator) A/c clutch output A/c compressor clutch coil (lower right front of engine) A/c high pressure cut out switch (in right side of engine compartment, near battery junction box) A/c wot cutout relay Amb temp sens input Ambient air temperature sensor (on front of upper radiator support) Battery Battery junction box (in right front of engine compartment, behind battery) Blend door (cool) Blend door (heat) Blend door actuator (behind right side of dash, on top of a/c plenum) Blend door pot gnd Blend dr feedback Blower motor (on top right side of firewall) Blower motor speed controller (on right side of firewall, on evaporator assembly) Blower mtr output Blower speed ctrl C227 C228 C255 Central junction box (below dash, left of steering column) Circuit breaker 17 30a Computer data lines system Cooling fan (front of engine compartment) Cooling fan high relay Cooling fan low relay E/m converter Electronic automatic temperature control (eatc) module (behind center of dash) Engine controls system English/ metric output Front panel illum Fuse 13 50a Fuse 15a Fuse 30a Ground High current relay center (right rear of engine compartment, behind battery junction box) Hot at all times Hot in run Ignition In car temp sens In-car temperature sensor (behind top center of dash) Instrument cluster (digital) Instrument illum Interior lights system Near door sill) g203 Pcm power relay Powertrain control module (pcm) (in engine compartment, on left side of firewall) Red Reference voltage Relay center (left side of engine compartment) Relay signal S116 (in 14290 harness, near breakout to ground, front of right front fender apron, right side of battery) S129 S139 (in 12a581 harness, on breakout for 8 pin in-line connector, left rear of engine compartment) S157 (in 12b637 harness, near breakout to a/c compressor clutch coil) S206 S227 (in 14401 harness, near breakout to gray in-line connector, lower right side of steering column, on connector bracket) S251 (in 14401 harness, in breakout to eatc) Scp data (-) Scp data bus (+) Sensor ground Sun load sensor (top right side of dash, above glove box) Sunload sens input Manual A/C Wiring Diagram for Mercury Grand Marquis LS 2001 List of elements for Manual A/C Wiring Diagram for Mercury Grand Marquis LS 2001: 62 (behind right kick panel, near door sill) g203 (front of right front fender apron, right side of battery) g111 (front of right front fender apron, right side of battery) g111 (in 14401 harness, near breakout to gray 3 pin in-line connector, behind right side of dash) s204 (not used) 0.5 ohms 1.3 ohms 87a A/c clutch cycling pressure switch (in right rear of engine compartment, on a/c accumulator) A/c compressor clutch coil (lower right front of engine) A/c heater mode switch A/c high pressure cutout switch (in right side of engine compartment, near battery junction box) A/c wot cutout relay A/c- heater mode switch illum Battery junction box (in right front of engine compartment, behind battery) Blend door actuator (behind right side of dash, on top of a/c plenum) Blower motor (on top right side of firewall) Blower motor resistor assembly (on right side of firewall, on evaporator assembly) Blower motor switch C2012 C2018 C2019 C2020 Central junction box (below dash, left of steering column) Circuit breaker 30a Cold Cooling fan (front of engine compartment) Cooling fan high relay Cooling fan low relay Def Floor Function selector switch assembly Fuse 16 15a Fuse 18 30a Fuse 50a High High current relay center (right rear of engine compartment, behind battery junction box) Hot at all times Hot in run Interior lights system Lamp) Low Max a/c Med high Med low Mix Norm a/c Off Pcm power relay Powertrain control module (pcm) (in engine compartment, on left side of firewall) Red Relay center (left side of engine compartment) S116 (in 14290 harness, near breakout to ground, front of right front fender apron, right side of battery) S129 (in 12a581 harness, near breakout to 12 pin in-line connector, left rear corner of engine compartment, rear of wheelwell) S139 (in 12851 harness, on breakout for 8-pin in-line connector, left rear of engine compartment) S157 (in 12b637 harness, near breakout to a/c compressor clutch coil) S206 (in 14401 harness, near breakout to glove box lamp) S226 (in 14401 harness, near breakout to gray in-line connector, lower right side of steering column, on bracket) Solid state Temperature control potentiometer Vent Warm
ANTI-LOCK BRAKES Anti-lock Brake Wiring Diagrams for Mercury Grand Marquis LS 2001 List of elements for Anti-lock Brake Wiring Diagrams for Mercury Grand Marquis LS 2001: 56 (in main harness, near breakout to dlc) (left kick panel) g200 Analog cluster Anti- lock ind Anti-lock brake module (left front of upper radiator support) Anti-lock ind Battery Battery junction box (right front of engine compartment, behind battery) Bpp switch Brake pedal position (bpp) switch (top of brake pedal support) Central junction box (left of steering column) Data link connector (behind left side of dash) Digital cluster Dlc Fuse 10a Fuse 15a Fuse 50a G101 (front of right front fender) G104 (rear of left front fender) Gasoline Ground Hot at all times Hot in run Ign Ignition Instrument cluster Interior lights system jr Left front brake sensor (brake ass'y) Left rear brake sensor (brake ass'y) Lf sensor Lr sensor Nca Ngv Red Red/pnk Rf sensor Right front brake sensor (brake ass'y) Right rear brake sensor (brake ass'y) Rr sensor S112 S231 S258 (near breakout to bpp switch) S265 S271 S296 S297 Scp bus (+) Scp bus (-) Tc ind Tcsw in Tract asst ind Tract asst input Traction control switch Warning Warning lamps module Warning system
ANTI-THEFT Anti-theft Wiring Diagram for Mercury Grand Marquis LS 2001 List of elements for Anti-theft Wiring Diagram for Mercury Grand Marquis LS 2001: 29 (1999, 2000) (1999, 2000) (2001) (2001) (main harn, near breakout to dlc) Battery Bus (+) Bus (-) Central junction block (below dash, left of steering column) Data link connector (behind left side of dash) Day/night sensor/ amplifier Fuse 15a Fuse 25a G203 (behind right kick panel) Ground Hot at all times Hot in run or start Ignition Passive anti-theft system control module (behind left side of dash) Passive anti-theft system transceiver module (behind left side of dash) Pats ind Receive Rf power S210 S223 S227 S285 S296 S297 Transmit
COMPUTER DATA LINES Computer Data Lines for Mercury Grand Marquis LS 2001 List of elements for Computer Data Lines for Mercury Grand Marquis LS 2001: 33 (eng compt harn, near breakout to front crash sensor) (eng compt harn, near breakout to front crash sensor) s134 (main harn, near breakout to data link connector) s297 (near left front door grommet) s241 Anti-lock brake module (on left front of upper radiator support) Battery junction box C124 C162 C185 C2027 C227 C229 C261 C518 Data link connector (dlc) (behind left side of dash) Dlc Dlc (+) Dlc (-) Driver door module (left front door) Electronic automatic temperature control module (ex natural gas) (center of dash) Fuse 30a G203 (behind right kick panel) Hot at all times Lighting control module (lcm) (behind left side of dash) Natural gas vehicle (ngv) module (on front of radiator support) Passive anti- theft module (behind left side of dash) Powertrain control module (pcm) (on left side of firewall) Restraints control module (rcm) (above glove box) S100 S135 S204 S271 (main harn, near breakout to data link connector) S296 (main harn, near breakout to data link connector)
COOLING FAN Cooling Fan Wiring Diagram for Mercury Grand Marquis LS 2001 List of elements for Cooling Fan Wiring Diagram for Mercury Grand Marquis LS 2001: 17 (front of right front fender apron, right side of battery) g111 (in 14290 harness, near breakout to ground, front of right front fender apron, right side of battery) s116 (not used) 87a Battery junction box (in right front of engine compartment, behind battery) Circuit breaker 17 30a Cooling fan (front of engine compartment) Cooling fan high relay Cooling fan low relay Fuse 13 50a High current relay center (right rear of engine compartment, behind battery junction box) Hot at all times Pcm power relay Powertrain control module (pcm) (in engine compartment, on left side of firewall) Red Relay center (left side of engine compartment) Relay ctrl
CRUISE CONTROL Cruise Control Wiring Diagram for Mercury Grand Marquis LS 2001 List of elements for Cruise Control Wiring Diagram for Mercury Grand Marquis LS 2001: 40 Air bag sliding contact Battery junction box (right front of engine compartment) Brake pedal position (bpp) switch (top of brake pedal support) Brake press C238 C254 C283 Central junction box (below dash, left of steering column) Coast Ctrl sw rtn Ctrl sw sig Digital cluster only Fuse 15a G203 (behind right kick panel) Ground Horn relay (in battery junction box) Horn switches Hot at all times Hot in acc or run Ind output Instrument cluster Lighting control module Nca Off Ohms Power Resume S105 S2009 S210 S243 (near breakout to multifunction switch) S247 (behind center of dash) S265 Set/ accel Speed control deac switch (below brake fluid reser- voir) Speed control servo assembly (left rear corner of engine compt) Speed control switch assembly Stop lp sig Vehicle speed sensor (vss) (left rear side of trans) Vss input
DEFOGGERS Defogger Wiring Diagram for Mercury Grand Marquis LS 2001 List of elements for Defogger Wiring Diagram for Mercury Grand Marquis LS 2001: 25 (behind right kick panel) (main harn, near breakout to multi-function switch) 87a Battery junction box C2000 C2026 Central junction box Defogger relay (in battery junction box) Defrost on/off switch Defrost relay fuse 14 40a Fuse 10 10a G203 Heated backlight relay output Heated backlight switch Hidden antenna module (right front of trunk) Hot at all times Interior lights system Lighting control module (behind left side of dash) Nca On ind. Rear window defrost control Rear window defroster grid S153 S207 Switch illum.
ELECTRONIC POWER STEERING Electronic Power Steering Wiring Diagram, with Air Suspension for Mercury Grand Marquis LS 2001 List of elements for Electronic Power Steering Wiring Diagram, with Air Suspension for Mercury Grand Marquis LS 2001: 33 (1999-00) (2001) Air suspension/ evo steering module (above glove box) Battery Battery junction box (behind battery) C215 C216 Central junction box (left of steering column) Evo act ouput + Evo act ouput - Evo actuator (on power steering assembly) Fuse 15a Fuse 30a G203 (behind right kick panel) Ground Hot at all times Hot in run Ignition Mirrors system Nca Red Rot rate input S105 S208 S210 S226 S247 (main harn, near breakout to front control unit) S274 S411 Steering wheel rotation sensor (bottom of steering column) Vehicle speed sensor (vss) (left rear of transmission) Vss input + Vss input - Electronic Power Steering Wiring Diagram, without Air Suspension for Mercury Grand Marquis LS 2001 List of elements for Electronic Power Steering Wiring Diagram, without Air Suspension for Mercury Grand Marquis LS 2001: 28 (1999-00) (2001) 15a Central junction box (left of steering column) Diag input Electronic variable orifice (evo) steering module (above glove box) Evo act ouput + Evo act ouput - Evo actuator (on power steering assembly) Evo test connector (right side of trunk) Fuse G203 (behind right kick panel) Ground Hot in run Ignition Mirrors system Nca Red Rot rate input S105 S208 S210 S226 S247 (main harn, near breakout to front control unit) S274 Steering wheel rotation sensor (bottom of steering column) Vehicle speed sensor (vss) (left rear of transmission) Vss input + Vss input -
ELECTRONIC SUSPENSION Electronic Suspension Wiring Diagram for Mercury Grand Marquis LS 2001 List of elements for Electronic Suspension Wiring Diagram for Mercury Grand Marquis LS 2001: 60 (1999-00) (2001) (body harn, near breakout to malfunction switch) (in main harn, near breakout to front control unit) s247 (near breakout to right rear speaker) s431 Air suspension compressor motor and vent solenoid (below air cleaner assembly) Air suspension indicator Air suspension relay Air suspension switch (left side of trunk) Air suspension test connector (left side of trunk) Air suspension/ evo steering module (above glove box) Analog digital Battery junction box Battery junction box (right front of engine compt, behind battery) C215 C216 C251 c254 Central junction box (below dash, left side of steering column) Comp rly Diag input Door open Driver's door module (in left front door) Evo act ctrl Evo actuator (on power steering assembly) Evo fdbk Fuse 15a Fuse 30a G101 (front of right fender apron) G203 (behind right kick panel) Ground Hot at all times Hot in run Ign on Indicator out Instrument cluster Left rear air spring solenoid (top of left air spring) Lin ht sens Linear height sensor (left rear upper control arm) Lr sol ctrl Mirrors system Nca Pnk Red Right rear air spring solenoid (top of right air spring) Rr sol ctrl S105 S112 S144 S208 S210 S234 S268 (near breakout to air bag diagnostic connector) S274 S406 S411 Serv sw St whl rot Steering wheel rotation sensor (base of steering column) Vehicle speed sensor (left rear side of transmission) Vent sol Vss in
ENGINE PERFORMANCE
4.6L 4.6L, Engine Performance Wiring Diagrams (1 of 4) for Mercury Grand Marquis LS 2001 List of elements for 4.6L, Engine Performance Wiring Diagrams (1 of 4) for Mercury Grand Marquis LS 2001: 73 (behind right kick panel) g203 (near breakout to fuel injector 8) (near breakout to ground at center rear of engine) (rear of left front fender apron) A/c cutout A/c system (a/c cutout sw) Battery junction box (right front of engine compt) Case gnd Central junction box (below dash, left of steering column) Ckp (+) Ckp (-) Coil 1 Coil 3 Coil 4 Coil 5 Coil 6 Cooling fans (fan high rly) Cooling fans (fan low relay) Crankshaft position sensor (lower right front of engine) Crankshaft position sensor shield Cyl temp ind Data link (+) Data link (-) Data link connector (dlc) (behind left side of dash) Ect ind Egr vac reg Egr vacuum regulator solenoid (top center rear of engine) Eprom Fan high rly Fan low rly Fuel flow Fuel gauge Fuel pump Fuse 15a Fuse 25a Fuse 30a G104 G104 (rear of left front fender apron) Hot at all times Hot in run or start Iat sens Ignition coils Instrument cluster Intake air temperature sensor (left front of engine compt) Maf sig rtn Mil Nca Pcm power diode Pcm power relay Powertrain control module (pcm) (in engine compt, on left side of firewall) Pwr gnd Radio noise capacitor (left front of engine, left side of left ignition coil) Red Relay center (left side of engine compt) Rt ho2s 12 S100 S103 S119 S134 S135 (near breakout to front crash sensor) S151 S223 S276 Shft sol a Shft sol b Tcil Tr1 Tr2 Tr4 Trans ctrl sw Trans temp Transmission control switch (bottom of steering column) Vss (-) 4.6L, Engine Performance Wiring Diagrams (2 of 4) for Mercury Grand Marquis LS 2001 List of elements for 4.6L, Engine Performance Wiring Diagrams (2 of 4) for Mercury Grand Marquis LS 2001: 36 (near breakout to right heated oxygen sensor 11) (speedometer/ odometer) vehicle speed input 4r70w transmission Analog C250 C251 C255 C256 Cylinder head temp input Differential pressure feedback egr sensor (right side of intake manifold) Digital Digital transmission range (dtr) sensor (left side of transmission) Electronic pressure control solenoid Engine coolant temp input Engine coolant temperature sender (top right front of engine) Evap canister purge valve (rear center of engine compt) Fuel flow rate input G104 (rear of left front fender apron) G203 (behind right kick panel) Instrument cluster Malfunction indicator input Mass air- flow sensor (behind air cleaner assembly) R n Red S105 S119 S126 S150 S222 (near breakout to inst cluster) Shift solenoids Ssa Ssb Throttle position sensor (left side of throttle body) Torque converter clutch solenoid Transmission control indicator input Transmission fluid temperature sensor 4.6L, Engine Performance Wiring Diagrams (3 of 4) for Mercury Grand Marquis LS 2001 List of elements for 4.6L, Engine Performance Wiring Diagrams (3 of 4) for Mercury Grand Marquis LS 2001: 40 (center rear of trunk) g407 (in trunk, on left support) inertia fuel shutoff switch (near breakout to 12-pin conn at left rear of engine compt) (near breakout to 8-pin conn left rear of engine) (near left rear of engine compt) (near left rear of engine compt) s148 (top of brake pedal support) brake pedal position switch Air conditioning (a/c cutout relay) Battery junction box (right front of engine compt) Camshaft position sensor (left front of engine, below left ignition coil) Central junction box (below dash, left of steering column) Cooling fans (fan high low relays) Cylinder head temperature sensor (top left front of engine) Fuel pump prime connector (left sdie of engine compt, near fender apron) Fuel pump relay Fuel pump/ fuel gauge sender Fuel tank assembly Fuel tank pressure sensor (on upper fuel tank assembly) Fuse 15a Fuse 20a Hot at all times Left heated oxygen sensor 21 (lower left rear of engine, in exhaust manifold) Left heated oxygen sensor 22 (in exhaust, rear of catalyst) Nca Output shaft speed sensor (left rear side of transmission) Red Red/pnk Relay center (left side of engine compt) Right heated oxygen sensor 11 (lower right rear of engine, in exhaust manifold) Right heated oxygen sensor 12 (in exhaust, rear of catalyst) S115 (near breakout to 16-pin conn at left rear of engine compt) S123 S124 S125 S129 S130 S132 S147 S265 S402 4.6L, Engine Performance Wiring Diagrams (4 of 4) for Mercury Grand Marquis LS 2001 List of elements for 4.6L, Engine Performance Wiring Diagrams (4 of 4) for Mercury Grand Marquis LS 2001: 77 (behind right side of dash) air suspension/ evo steering module (behind right side of dash) electronic variable orifice steering module (behind right side of dash) speed chime module (left rear corner of engine compt) speed control servo assembly (left rear side of transmission) vehicle speed sensor (near breakout to 42-pin conn at left rear of eng compt) (near ground at center rear of engine) (rear of vehicle, below left side of trunk) canister vent solenoid A/c cutout sw A/c system (a/c cutout rly) A/c system (a/c cutout sw) A/c wot cutout Batt Battery junction box (right front of engine compt) Brake on/off C204 C214 C216 C234 Cam pos in Can vent sol Cht sensor Coil 2 Coil 7 Coil 8 Dpfe sens Epc sol Evap purge vlve Fuel inj 1 Fuel inj 2 Fuel inj 3 Fuel inj 4 Fuel inj 5 Fuel inj 6 Fuel inj 7 Fuel inj 8 Fuel injectors Fuel press Fuel pump ctrl Fuse 30a G104 (rear of left front fender apron) G203 (behind right kick panel) Heater ctrl Hot at all times Iac sol Idle air control valve (left side of intake manifold) L ho2s Lft ho2s 21 Lft ho2s 22 Maf sens in Oss (+) Power Power gnd Powertrain control module (pcm) (in engine compt, on left side of firewall) Pwr gnd R ho2s Red Red/pnk Ref volt Rt ho2s 11 S100 S105 S109 (near breakout to 12-pin conn at left rear of engine compt) S119 S131 S143 S247 (near breakout to front control unit) Sig rtn Tan Tan/red Tcc sol Tp sens in Tr3 Vss (+) Vss (-) W/ air suspension & evo steering W/ evo steering only
EXTERIOR LIGHTS Back-up Lamps Wiring Diagram for Mercury Grand Marquis LS 2001 List of elements for Back-up Lamps Wiring Diagram for Mercury Grand Marquis LS 2001: 12 (behind right kick panel) g203 Central junction box (below dash, left of steering column) Digital transmission range (dtr) sensor (on left side of transmission) Electronic day/night mirror Fuse 15a Hot in run Left reversing lamp Not used Right reversing lamp S139 S230 (main harn, near breakout to ground g200) S420 Exterior Lamps Wiring Diagram for Mercury Grand Marquis LS 2001 List of elements for Exterior Lamps Wiring Diagram for Mercury Grand Marquis LS 2001: 84 (behind left side of dash) lighting control module (lcm) (dash harn, in breakout to bpp switch) (dash harn, near breakout to horns) s120 (front of right front fender apron) g101 (left rear of luggage compt) (left side of luggage compt) s409 (main harn, in breakout to multi-function sw) (main harn, near breakout to instrument cluster) s257 (right rear of luggage compt) Analog B+ vbat 1 B+ vbat 2 B+ vbat 3 Brake pedal position (bpp) switch (top of brake pedal support) C2027 C2029 C250 C251 C256 C268 C269 Central junction box (below dash, left of steering column) Clock Digital Flasher power input Flasher power output Fuse 15a Fuse 20a G101 (front of right front fender apron) G203 (behind right kick panel) G407 (center rear of luggage compartment) Hazard Head High mount stoplamp assembly Hot at all times Hot in run Instrument cluster Left cornering lamp Left front park/ turn lamp Left front side lamp Left rear park lamp Left rear park/stop/ turn lamp 1 Left rear park/stop/ turn lamp 2 Left turn ind License lamp Lo beams output Main light switch Main light switch input Multi- function switch Nca Normal Off Park Parklamp output Parklamp switch input Right cornering lamp Right front park/ turn lamp Right front side lamp Right rear park lamp Right rear park/stop/ turn lamp 1 Right rear park/stop/ turn lamp 2 Right turn ind S107 S108 S112 S113 S226 S227 S242 (in harness, behind clock) S243 (dash harn, in breakout to multi-function switch) S244 S262 S263 S265 S285 S400 S401 S413 S416 S420 S422 S442 Turn left Turn right
GROUND DISTRIBUTION Ground Distribution Wiring Diagram (1 of 3) for Mercury Grand Marquis LS 2001 List of elements for Ground Distribution Wiring Diagram (1 of 3) for Mercury Grand Marquis LS 2001: 62 (engine harn, near breakout to a/c compressor clutch coil) (near battery) (not used) A/c compressor clutch coil A/c high pressure cutout switch Air suspension compressor motor & vent solenoid Anti-lock brake system module Bare Battery Battery junction box Blend door actuator Blower motor resistor assembly Blower motor speed controller Cooling fan Crankshaft position sensor shield Daytime running lamps module Fuel rail cutoff solenoid Function selector switch assembly G101 (front of right front fender apron) G104 (rear of left front fender apron) G111 g101 (front of right fender apron) G115 (center rear of engine) G203 (behind right kick panel) G407 (center rear of luggage compartment) Gasoline Grand marquis only High current relay center High mounted stoplamp Horn assembly Left cornering lamp Left front park/ turn lamp Left front side marker lamp Left headlamp Left i/p courtesy lamp Mass airflow sensor Natural gas only Natural gas vehicle module Of luggage compartment) Pcm power relay Police power relay Powertrain control module Relay center Right cornering lamp Right front park/ turn lamp Right front side marker lamp Right headlamp S107 (engine harn, near breakout to right cornering lamp) S108 (engine harn, near breakout to right cornering lamp) S113 (engine harn, near breakout to right front brake sensor) S119 (eng compt harn, left rear of eng compt) S156 (engine compt harn, near breakout to fuel rail cutoff solenoid) S157 S206 (dash harn, near glove box lamp) S422 (center rear bare Starter motor relay Stop/luggage compartment lid lamp shield To s204 (diagram 2 of 3) W/ eatc W/ natural gas W/o eatc Windshield washer low fluid switch Windshield washer pump Ground Distribution Wiring Diagram (2 of 3) for Mercury Grand Marquis LS 2001 List of elements for Ground Distribution Wiring Diagram (2 of 3) for Mercury Grand Marquis LS 2001: 63 (digital cluster) instrument cluster Adjustable pedal switch Air suspension/ evo steering module Analog cluster Base radio Brake fluid level switch C2027 C2029 C249 C250 C251 C262 Clock Data link connector Day/ night sensor/ amplifier Digital cluster Electronic automatic temperature control module Electronic varible orifice steering module Engine compartment lamp Engine coolant temperature sender From s206 a (diagram 1 of 3) Front control unit Fuel tank assembly Function selector switch assembly G203 (behind right kick panel) Gasoline I/p cigar lighter Ignition switch In breakout to instrument cluster) Instrument cluster Lighting control Lighting control module Main light switch Message center switch assembly Module Ngv, manual a/c, analog cluster w/eatc, analog cluster w/ premium radio Others Passenger seat weight module Passive anti-theft system module Police option Power point Powertrain control module Premium radio Rear window defrost control Right i/p courtesy lamp S200 (dash harn, behind right side of dash) S203 (dash harn, near right kick panel) S204 (dash harn, right side of dash) S207 (dash harn, near breakout to instrument cluster) Shift lock actuator Speed chime module Speed control servo Traction control switch Vehicle speed sensor W/ air suspension W/ analog cluster W/ digital cluster W/ eatc W/o air suspension W/o eatc Warning lamps module Windshield wiper motor Wiper control module Ground Distribution Wiring Diagram (3 of 3) for Mercury Grand Marquis LS 2001 List of elements for Ground Distribution Wiring Diagram (3 of 3) for Mercury Grand Marquis LS 2001: 85 Air suspension/ evo steering module All others Crown victoria only Driver's power lumbar compressor Driver's safety belt buckle switch Driver's seat control switch Driver,s door module Electronic day/night mirror Electronic varible orifice steering module Emergency flasher relay 1 Emergency flasher relay 2 Emergency flasher relay block Exterior rear view mirror switch Front interior reading lamp Front interior/ reading lamp Fuel tank assembly Fuel tank solenoid valve 1 Fuel tank solenoid valve 2 Fuel tank solenoid valve 3 Fuel tank solenoid valve 4 G203 (behind right kick panel) G407 (center rear of luggage compt) Gasoline Grand marquis only Interior lamp Key pad switch assembly Left front door latch switch Left park/ stop/ turn lamp 1 Left park/ stop/ turn lamp 2 Left rear door latch switch Left rear park lamp Left rear turn signal lamp 1 Left rear turn signal lamp 2 Left rear window control switch Left reversing lamp Left vanity lamp License lamp Luggage comp- artment lid lamp Luggage compartment lid release solenoid/ ajar switch Luggage compartment lid release switch Master window/ lock control switch Natural gas Natural gas only One touch window down module Others Passenger's power lumbar compressor Passenger's seat control switch Police map lamp assembly Police option only Police package Police w/ dual beam interior lamp Rear interior/ reading lamp Right front door latch switch Right front window/ door lock control switch Right park/ stop/ turn lamp 1 Right park/ stop/ turn lamp 2 Right rear door latch switch Right rear park lamp Right rear turn signal lamp 1 Right rear turn signal lamp 2 Right rear window control switch Right reversing lamp Right vanity lamp S208 (dash harn, right side of dash) S304 (body harn, near breakout to safety belt switch) S400 (body harn, left rear of luggage compt) S401 (body harn, right rear of luggage compt) S402 (body harn, left rear of luggage compt) S403 (body harn, center rear of luggage compt lid) S405 (body harn, in breakout to fuel tank solenoid 4) S420 (body harn, rear of luggage compartment) S428 (body harn, left rear of vehicle) S500 (door harn, center of left front door) S503 (door harn, center of left front door) S600 (door harn, front of right front door) Standard production Steering wheel rotation sensor W/ air suspension W/ air suspension only W/ police option W/ power seats W/ rke W/o air suspension W/o police option W/o rke
HEADLIGHTS Headlamps Wiring Diagram, with DRL for Mercury Grand Marquis LS 2001 List of elements for Headlamps Wiring Diagram, with DRL for Mercury Grand Marquis LS 2001: 90 "lamps on" adjustment (main harn, near glove box lamp breakout) s290 (main harness, near breakout at right kick panel) s269 A analog cluster Acc Aut0lamp enable Autolamp delay Autolamp on/off B digital cluster B+ (vbat 2) B+ (vbat 3) Bat pwr Battery junction box (in right front of engine compt, behind battery) Brake fluid level switch Brake ind C2004 C2026 C2027 C2029 C250 C256 C262 Central junction box Central junction box (below dash, left of steering column) Day/night sensor amplifier Daytime running lamps module (on front of upper radiator support) Demand lighting out Dimmer switch Early Exit delay rheostat Flash -to- pass Fuse 10a Fuse 15a Fuse 20a G101 (front of right front fender apron) G200 (behind left kick panel) G203 (behind right kick panel) Gnd Ground Head Headlamp input Hi beam in Hi beam indicator Hot at all times Hot in acc or run Hot in run Hot in run or start Ign (run) Ign acc or run Ign start or run Ignition switch In breakout to electronic crash sensor) Instrument cluster Interior lights system Late Left headlamp Lighting control module (behind left side of dash) Lo beam in Lo beams output Lock Low Main light switch Max Min Multi- function switch Off Park Park lamp input Parking brake switch (behind left side of dash, on top of parking brake assembly) Pass Right headlamp Run S112 S113 S138 (eng compt harn, near breakout to realy center) S190 (engine harn, near breakout to horn) S2009 S203 S204 S207 S210 S226 S262 S276 S277 (dash harn, near breakout to lighting control module) S285 Start W/ analog cluster W/ digital cluster Warning lamps module Headlamps Wiring Diagram, without DRL for Mercury Grand Marquis LS 2001 List of elements for Headlamps Wiring Diagram, without DRL for Mercury Grand Marquis LS 2001: 59 "lamps on" adjustment A analog cluster Aut0lamp enable Autolamp delay Autolamp on/off B digital cluster B+ (vbat 2) C2026 C2027 C2029 C250 C256 C262 Central junction box Central junction box (below dash, left of steering column) Day/night sensor amplifier Dimmer switch Dmnd lghtng out Early Exit delay rheostat Flash -to- pass Fuse 10a Fuse 15a Fuse 20a G101 (front of right front fender apron) G203 (behind right kick panel) Head Headlamp input Hi beam indicator Hot at all times Hot in acc or run Hot in run or start Ign acc or run Ign start or run Instrument cluster Late Left headlamp Lighting control module (behind left side of dash) Lo beams output Main light switch Max Min Multi- function switch Off Park Park lamp input Pass Right headlamp S112 S113 S138 (eng compt harn, near horn assy breakout) S2009 S204 S210 S262 S269 (main harness, near breakout at right kick panel) S276 S277 S290 (main harn, near glove box lamp breakout) Lighting Control Module Wiring Diagram for Mercury Grand Marquis LS 2001 List of elements for Lighting Control Module Wiring Diagram for Mercury Grand Marquis LS 2001: 72 (police only) A except police All doors lock in Autolamp delay pot Autolamps on/off Autolmp enab or pwr B police C2026 C2027 C2029 C255 C286 Central junction box (below dash, left of steering column) Computer data lines system Courtesy lamps out Data link connector Day/night sensor/ amplifier (on top left side of dash above instrument cluster) Decklid ajar sw Defogger system Demand lighting out Dome lamp sw Door ajar out Door handle sws Door lock system (keyless entry circuit) Door locks system Driver door ajar sw Exterior lights system Flasher out Flasher power in Fuse 15a Fuse 20a G203 (behind right right kick panel) Ground Hazard warn indic Headlamp sw Headlights system Horn relay out Horns system Hot at all times Hot in acc or run Hot in run or start Instrument cluster Instrument cluster system Interior lights system Key-in-ignition sw Lighting control module (lcm) (behind left side of dash) Low beams out Panel dim down sw Panel dim up sw Panic alarm in Parklamp out Parklamp sw Pass door ajar sw Power (battery) Power (ignition) Pulse width dim out Rear defog relay Rear defog sw Restrnts cntrl module S2009 S204 S207 S227 S262 S276 S285 Seat belt indic out Tone request Trunk, tailgate, fuel doors system Variable volt dimming Warning systems Wiper/washer system
HORN Horn Wiring Diagram for Mercury Grand Marquis LS 2001 List of elements for Horn Wiring Diagram for Mercury Grand Marquis LS 2001: 19 (front of right fender apron) g101 87a Battery junction box Battery junction box (behind battery) C2026 C234 Clockspring assembly Control switch return Cruise control system Fuse 15a Horn Horn assembly (behind left center of grille) Horn relay Hot at all times Lighting control module (lcm) (behind left side of dash) Nca S112 Speed control servo assembly (left rear corner of engine compartment) Switches
INSTRUMENT CLUSTER Analog Cluster Wiring Diagram for Mercury Grand Marquis LS 2001 List of elements for Analog Cluster Wiring Diagram for Mercury Grand Marquis LS 2001: 181 "air bag" "anti-lock" "fail-safe cooling" "traction (1999- (2001) (1999-00) (2001) (behind left (behind left side (behind left side of dash) (behind right (behind right side of dash, (below dash, (body harn, behind (body harness, behind (check engine) (engine harn, (in engine compt, (in right (left side of (main (main harn, (main harn, left (on brake (on front of upper (on left front of upper (on left rear side (on lower left (on rear of (on top right front (qty. 6) 00) 10a 15a 30a Above glove box) Above oil filter) Acc Air Air suspension Air suspension/evo steering module Airbag indicator Anti-lock brake module Anti-slosh Assembly Assist" At all Battery Behind Behind battery) Belts indicator Box Brake Brake assembly) Brake fluid C2029 C215 C250 C251 C261 C277 C459 Center of dash) Central Charge Column) Control Daytime running Dimming output Ect sensor in Electronic Electronic crash sensor Engine compt) Engine compt, Engine coolant Engine oil Engine oil pressure Exterior Fail-safe cooling Fasten Firewall) Fluid Front of Fuel Fuel injector 1) Fuel level in Fuel tank) Fuse Fuse 8 G200 G203 G203 (behind right Gauge Generator Gnd Guage Harn, Headlights system Hi beam Hot Hot in Ignition switch Illumination lamps In run Indicator Indicator control Indicator out Indicator output Instrument cluster Junction Kick panel) Lamps (drl) module Left of Left rear of Left side Left turn Level switch Lighting control module Lights Lock Low Low fuel Malfunction Mil output Module Module (pcm) Nca Normal Odometer Of dash) Of dash, on top Of engine, near Of parking Of transmission) Off Ohms On left side of Or run Park brake Powertrain control Pressure switch Radiator support) Reservoir) Restraints control module Right side Right side of dash) Right turn Run S105 S144 S202 S204 S207 S209 S210 S222 S231 S234 S276 S287 Sensor Side of dash) Side of engine, Speed Speedometer/ Start Steering Suspension Switch System Tank Tcil Temperature Temperature sender Test connector Times Traction ind out Transmission Trunk) Vehicle Voltmeter Electronic Cluster Wiring Diagram (2 of 2) for Mercury Grand Marquis LS 2001 List of elements for Electronic Cluster Wiring Diagram (2 of 2) for Mercury Grand Marquis LS 2001: 62 "a" pillar) (behind left side of dash) (behind right (behind right side of dash, (body harn, (body harn, near (left front door) (main harn, (main harn, near Above glove box) Air suspension Airbag diagnostic Ajar Ajar lamp output Ajar switch Behind left Breakout to C2026 C2027 C2029 C216 C518 Closed Connector) Decklid jar Door Door ajar Driver's ajar switch Driver's door Evo steering module Front G203 Input Kick panel) Latch Left Lid Lid release Lighting control module Lighting ctrl Luggage compt Module Module) Nca Near right Pass. ajar switch Rear Right S259 S268 S273 S277 S304 S403 S500 S600 Seat belt Seatbelt ind out Seatbelt switch Solenoid/ Switch Tone request Electronic Cluster Warning Lamps Wiring Diagram for Mercury Grand Marquis LS 2001 List of elements for Electronic Cluster Warning Lamps Wiring Diagram for Mercury Grand Marquis LS 2001: 37 (1999-00) (1999-00) (2001) (2001) 1999-00 Acc Air bag ind Anti- lock ind Anti-lock brake module (on left front of upper radiator support) Anti-lock brake system (abs) module (on left front of upper radiator support) Brake fluid level switch Brake indicator C162 C2026 C261 Central junction box Daytime running lamps (drl) module (on front of upper radiator support) Fuse 15a G200 (behind left kick panel) G203 (behind right kick panel) Gnd Ground Hazard warning indicator Hot in start or run Ignition switch Lighting control module (behind left side of dash) Lock Off Parking brake switch (behind left side of dash, on top of parking brake assembly) Restraints control module (rcm) (behind right side of dash, above glove box) Run S203 S207 S209 (body harn, behind right side of dash) S276 Start Traction assist ind Warning lamps module
INTERIOR LIGHTS Courtesy Lamps Wiring Diagram for Mercury Grand Marquis LS 2001 List of elements for Courtesy Lamps Wiring Diagram for Mercury Grand Marquis LS 2001: 65 (behind right kick panel) (body harn, near right "c" pillar) s259 (body harn, right side of dash) s238 (main harn, behind right side of dash) s236 (main harn, near glove box lamp breakout) (near park brake switch breakout) s295 (roof harn, near center of right "c" pillar) (roof harn, near front interior/ reading lamp breakout) s900 All others B (+) C2026 C2027 C2029 C262 Central junction box Demand out Door ajar Engine compartment lamp (ngv & police option) Exterior lights system Front interior/ reading lamp Fuse 15a Fuse 20a G203 G203 (behind right kick panel) Glove box lamp Grand marquis only Handle sw Headlights system Hot at all times Interior lamp Lamps out Left front door handle switch Left front door latch switch Left i/p courtesy lamp Left rear door latch switch Left vanity lamp (except police option w/ dual beam interior lamp) Lighting control module (lcm) (behind left side of dash) Luggage compartment lid lamp Luggage compartment lid solenoid/ ajar switch Main light switch Nca Police map lamp assembly (center of windshield header) Police option Police option w/o dual beam interior lamp Rear interior/ reading lamp (grand marquis only) Right front door handle switch Right front door latch switch Right i/p courtesy lamp Right rear door latch switch Right vanity lamp (except police option w/ dual beam interior lamp) S204 S206 S208 S216 (near brake pedal position switch breakout) S227 S262 S500 S901 S902 Standard production & police w/o dual beam interior lamp Switch input Trunk ajar Trunk lid release solenoid/ ajar switch W/o keyless entry Warning systems Instrument Illumination Wiring Diagram for Mercury Grand Marquis LS 2001 List of elements for Instrument Illumination Wiring Diagram for Mercury Grand Marquis LS 2001: 68 (behind right kick panel) (body harn, right side of dash) (digital) (analog) (main harn, near clock breakout) (main harn, near eatc control module breakout) s287 A/c-heater mode switch illumination Adjustable pedal switch B (+) C2026 C2027 C2029 C227 C228 C232 C249 C255 C256 c250 C262 Central junction box Clock Cluster/ prndl illumination Digital cluster only Dim dn input Dim down Dim up Dim up input Dimming out Electronic automatic temperature control (eatc) module Electronic automatic temperature control (eatc) module (behind center of dash) Front control unit Fuse 15a G203 G203 (behind right kick panel) Grd Head Headlamp dimmer switch Headlite sw in Hot at all times Illumination Instrument cluster Led switch illum Left rear window control switch Lighting control module (lcm) (behind left side of dash) Main light switch Master window/ door lock control switch Message center switch assembly Nca Off Others Park Park lt sw in Police option Rear window defrost control Right front window/ door lock control switch Right rear window control switch S204 S207 S208 S227 S233 S262 S285 S288 S503 S600 Traction control switch W/ eatc W/o eatc
POWER DISTRIBUTION Power Distribution Wiring Diagram (1 of 4) for Mercury Grand Marquis LS 2001 List of elements for Power Distribution Wiring Diagram (1 of 4) for Mercury Grand Marquis LS 2001: 70 (dash harn, behind left side of dash) s283 (dash harness, in breakout to blend door actuator) s245 (engine compt harn, near breakout to fuse box) s100 (near breakout to clock) s213 (rear harn, near breakout to right rear speaker) Adjustable pedal switch Air suspension compressor motor/ vent solenoid Air suspension relay Air suspension/ evo steering module Battery Battery junction box C216 C251 C520 Cd changer Circuit breaker 7 20a Cooling fan high relay Customer use Data link connector Driver's door module Driver's lumbar switch Driver's seat control switch From a fuse 4 (diagram 1 of 4) Front control unit Fuel pump prime connector Fuel pump relay or fuel valve relay Fuse 15a Fuse 20a Fuse 25a Fuse 30a Fuse 50a Generator High current relay center Horn relay Instrument cluster (analog) Left rear air spring solenoid Luggage compartment lid release switch Luggage compartment lid release switch 2 Master window/ door lock control switch Natural gas vehicle module Nca Ngv Passenger's lumbar switch Passenger's seat control switch Pcm power relay Police option fuse holder Police power relay Powertrain control module Red Relay center Right front window/ door lock control switch Right rear air spring solenoid S114 (right side of engine compartment) S124 (engine harn, near breakout to fuel pump prime) S144 (engine compt harn, near breakout to fuse box) S155 S250 (dash harn, behind left side of dash) S282 (dash harn, behind left side of dash) S406 (rear harn, near breakout to rear air spring solenoid) S411 Starter/ motor solenoid Subwoofer amplifier (lux radio) To fuse 15 (diagram 2 of 4) To fuse 8 (diagram 1 of 4) W/ keyless entry W/ police W/ power lumbar W/o keyless entry W/o police W/o power lumbar Power Distribution Wiring Diagram (2 of 4) for Mercury Grand Marquis LS 2001 List of elements for Power Distribution Wiring Diagram (2 of 4) for Mercury Grand Marquis LS 2001: 53 (dash harness, near breakout to instrument cluster) s294 (dash harness, near breakout to lighting control module) s227 (dash harness, near breakout to lighting control module) s228 Anti-lock brake system (abs) module Battery junction box C2029 C227 C249 C255 C262 Central junction box Circuit breaker 30a Clock Cooling fan low relay Dash cigar lighter Day/ night sensor amplifier Daytime running lamps module Electronic automatic temperature control module Emergency flasher relay 1 Emergency flasher relay 2 Emergency flasher relay block From circuit breaker 7 (diagram 1 of 4) Fuse 10a Fuse 15a Fuse 20a Fuse 40a G203 (right kick panel, near door sill) Hidden antenna module Instrument cluster Left spot light Lighting control module Lighting control module (lcm) Main light switch Master window/ door lock control switch Multi- function switch Nca Passive anti-theft system module Police option Power mirror switch Power point Rear window defrost control Rear window defrost relay Right front window/door lock control switch Right spot light S153 (near engine compartment fuse box) S206 S252 (main harn, near breakout to multi- function switch) S262 (dash harn, near breakout to lighting control module) S285 (dash harn, near breakout to main light switch) S426 (trunk harn, near breakout to relay center) To fuse 2 (diagram 3 of 4) W/police option W/remote keyless entry Power Distribution Wiring Diagram (3 of 4) for Mercury Grand Marquis LS 2001 List of elements for Power Distribution Wiring Diagram (3 of 4) for Mercury Grand Marquis LS 2001: 70 (analog) (dash harn, near breakout to day/night sensor amplifier) s226 (dash harn, near breakout to ignition switch) s219 (dash harn, near breakout to ignition switch) s263 (dash harness, near breakout to ignition switch) (digital) A/c wot cutout relay Acc Air suspension/ evo steering module Anti-lock brake system (abs) module Battery junction box Blend door actuator Blower motor Brake pedal position switch C216 C251 C255 C256 C261 Central junction box Daytime running lamps module Digital transmission range sensor Electronic automatic temperature control module Electronic day/night mirror Electronic variable orifice (evo) steering module Evo steering module From fuse 14 (diagram 2 of 4) Function selector switch assembly Fuse 10a Fuse 15a Fuse 20a Fuse 30a Fuse 50a Gasoline Generator Ignition switch Instrument cluster Lock Multi- function switch Nca Off Passenger air bag deactivated indicator Passenger seat weight module Red Relay center Restraints control module Run S139 S229 S231 (dash harn, near clock) S265 (near brake pedal position switch) S270 S272 (dash harness, near breakout to ignition switch) S274 (dash harn, near breakout to evo steering module) Shift lock actuator Speed chime module Speed control deac switch Start Starting/ charging system Steering wheel rotation sensor To fuse 13, 15, 17 & 28 (diagram 4 of 4) To fuse 6 & 8 (diagram 4 of 4) Traction control switch W/ air suspension W/ drl W/ eatc W/o air suspension W/o eatc W/o police W/police Power Distribution Wiring Diagram (4 of 4) for Mercury Grand Marquis LS 2001 List of elements for Power Distribution Wiring Diagram (4 of 4) for Mercury Grand Marquis LS 2001: 63 (body harn, near breakout to transmission range sensor) s218 (dash harn, near breakout to ignition switch) s221 (dash harn, near breakout to multifunction switch) s2009 (dash harn, near breakout to trunk lid release switch) s211 (engine harn, near breakout to camshaft position sensor) s103 (front of right fender) s151 Battery junction box C2026 C2027 C229 C232 C249 C250 C251 C262 C520 Central junction box Clock Digital cluster Driver's door module Except police From ignition switch (diagram 3 of 4) Front control unit Fuse 15a Fuse 20a Fuse 25a Fuse 30a Fuse 5a Ignition coil 1 Ignition coil 2 Ignition coil 3 (gasoline) Ignition coil 3 (ngv) Ignition coil 4 (gasoline) Ignition coil 4 (ngv) Ignition coil 5 (gasoline) Ignition coil 5 (ngv) Ignition coil 6 (ngv) Ignition coil 7 Ignition coil 8 Ignition coil 8 (gasoline) Instrument cluster (analog) Lighting control module Luggage compt lid release switch 1 Main light switch Master window/ door lock control switch One touch window down module Passive anti- theft system control module Pcm power diode Police Police only Police power relay Radio noise capacitor Relay center S223 (left side of dash) Speed control servo assembly Transmission control switch W/ keyless entry W/ police W/o keyless entry W/o police Warning lamps module Windshield wiper motor Wiper control module
POWER DOOR LOCKS Door Lock Wiring Diagram for Mercury Grand Marquis LS 2001 List of elements for Door Lock Wiring Diagram for Mercury Grand Marquis LS 2001: 23 (body harn, behind left kick panel) s260 (body harn, near breakout to bpp switch) s261 (body harn, near breakout to right rear door grommet) s291 Battery junction box (in right front of engine compt, behind battery) C2029 Circuit breaker 7 20a Door lock in G203 (behind right kick panel) Hot at all times Interior lights system Left front door lock motor Left rear door lock motor Lighting control module (behind left side of dash) Lock Master window/door lock control switch Right front door lock motor Right front window/door lock control switch Right rear door lock motor S208 S245 S503 S600 Unlock Keyless Entry Wiring Diagram for Mercury Grand Marquis LS 2001 List of elements for Keyless Entry Wiring Diagram for Mercury Grand Marquis LS 2001: 66 (body harn, left side of dash) (body harn, near breakout to left exterior heated mirror) s506 1/2 3/4 5/6 7/8 9/0 Battery junction box (in right front of engine compt, behind battery) C2026 C2027 C2029 C518 C519 C520 Central junction box (below dash, left of steering column) Circuit breaker 7 20a Door ajar Door handle Door hndl sw Door lock Door unlock Driver's door module (left front door) Fuse 15a G203 (behind right kick panel) Hot at all times Interior lights system Keypad illum Keypad sw a Keypad sw b Keypad sw c Keypad switch assembly Left front door lock motor Left rear door lock motor Lf door unlck Lighting control module (behind left side of dash) Lock Luggage compartment lid release solenoid/ ajar switch Luggage compartment lid release switch Master window/ door lock control switch Nca Panic Panic out Right front door lock motor Right front window/door lock control switch Right rear door lock motor S208 S228 S235 S245 S260 (body harn, behind left kick panel) S261 (body harn, near breakout to park boo switch) S291 (body harn, near breakout to right rear door grommet) S304 S403 S500 S502 (door harn, center of left front door) S503 S510 (body harn, near breakout to left front door) S600 Seat Seat switch Start input Starting/charging system Trunk Trunk lid Unlock
POWER MIRRORS Power Mirror Wiring Diagram for Mercury Grand Marquis LS 2001 List of elements for Power Mirror Wiring Diagram for Mercury Grand Marquis LS 2001: 24 (body harn, near breakout to brake pedal position switch) Air suspension/ evo steering module (behind right side of dash) C214 C216 Central junction box (below dash, left of steering column) Digital transmission range (dtr) sensor (left side of transmission) Electronic day/night mirror Electronic variable orifice steering module (behind right side of dash) Exterior lights system Fuse 15a G203 (behind right kick panel) Ground Hot in run Nca Power Reverse S139 S208 S215 S226 S274 Sense W/air suspension W/o air suspension Power Mirrors Wiring Diagram for Mercury Grand Marquis LS 2001 List of elements for Power Mirrors Wiring Diagram for Mercury Grand Marquis LS 2001: 18 (1999 & 2000) (2001) Central junction box (below dash, left of steering column) Direc- tional control switch Down Exterior rear view mirror switch Fuse 15a G203 (behind right kick panel) Hot at all times L/r motor Left Left exterior rear view mirror Nca Red Right Right exterior rear view mirror S228 S500 Up/dn motor
POWER SEATS 6-Way Recliner & Lumbar Power Seat Wiring Diagram for Mercury Grand Marquis LS 2001 List of elements for 6-Way Recliner & Lumbar Power Seat Wiring Diagram for Mercury Grand Marquis LS 2001: 37 red Battery junction box (in right front of engine compt, behind battery) Driver lumbar air bladder Driver lumbar switch Driver power lumbar compressor (under front of left front seat) Driver power seat motor Driver recliner motor Driver seat control switch Entire seat Front height motor Front of seat Fuse 20a Fwd Fwd/ rwd motor G203 (behind right kick panel) Hot at all times Inflate Nca Nca Passenger lumbar air bladder Passenger lumbar switch Passenger power lumbar compressor (under right of right front seat) Passenger power seat motor Passenger recliner motor Passenger seat control switch Rear height motor Rear of seat Red Rwd S208 S245 S304 S500 S600 Seat back Up Vent Adjustable Pedal Wiring Diagram for Mercury Grand Marquis LS 2001 List of elements for Adjustable Pedal Wiring Diagram for Mercury Grand Marquis LS 2001: 12 (police) (exc police) Adjustable pedal motor (below left side of dash) Adjustable pedal switch Battery junction box (right front of eng compt, behind battery) Circuit breaker 20a G203 (behind right kick panel) Hot at all times Interior lights system Nca Red S207 S250 s245 Driver Power Seat Wiring Diagram for Mercury Grand Marquis LS 2001 List of elements for Driver Power Seat Wiring Diagram for Mercury Grand Marquis LS 2001: 18 Battery junction box (in right front of engine compt, behind battery) Driver power seat motor Driver seat control switch Entire seat Front height motor Front of seat Fuse 20a Fwd Fwd/ rwd motor G203 (behind right kick panel) Hot at all times Nca Rear height motor Rear of seat Red Rwd S245 S304
POWER WINDOWS Power Window Wiring Diagram for Mercury Grand Marquis LS 2001 List of elements for Power Window Wiring Diagram for Mercury Grand Marquis LS 2001: 48 (2 led's per switch) (near break- out to brake pedal pos switch) s264 (near breakout to air suspension/evo strng module) s288 C298 C518 C520 Central junction box (below dash, left of steering column) Circuit breaker 20a Door lock control switch Driver door module (w/ keyless entry) (center of left Driver door) Entry Front driver door) G203 (behind right kick panel) Hot in acc or run Ign Interior lights system Keyless Left Left front Left front window motor Left front window motor (police only) Left rear Left rear window motor Master window/ door lock control switch Nca One touch window down module (w/o keyless entry) (center of Others Police Rear window control switch Right Right front Right front window motor Right rear Right rear window motor S208 S218 S500 S503 S504 (near breakout to left front door speaker) S600 Solid state W/ keyless entry W/o W/o keyless entry Window lock switch Wndw dn Wndw up
RADIO Radio Wiring Diagrams, with Amplifier for Mercury Grand Marquis LS 2001 List of elements for Radio Wiring Diagrams, with Amplifier for Mercury Grand Marquis LS 2001: 68 (behind right kick panel) g203 (center rear of luggage compartment) Acc Antenna Audio (+) Audio (-) Audio mute Audio network Audio shield Audio system on Battery junction box (right front of engine compt, behind battery) C224 C230 C232 C401 C499 Cd changer Cd left sig in Cd left sig out Cd right sig in Cd right sig out Central junction box (below dash, left of steering column) Front control unit Fuse 20a Fuse 25a Fuse 5a Fused ignition G203 (behind right kick panel) G407 G407 (center rear of luggage compartment) Ground Hot at all times Hot in run or acc Ignition switch Illum power Interior lights L front spkr (+) L front spkr (-) L rear spkr (+) L rear spkr (-) Left front speaker Left rear speaker Lock Nca Off Power R front spkr (+) R front spkr (-) R rear spkr (+) R rear spkr (-) Right front speaker Right rear speaker Run S127 S204 S213 S267 (main harn, near breakout to ignition switch) S446 Sta Start Start feed Starting system, door locks system Sub speaker Subwoofer (+) Subwoofer (-) Subwoofer amplifier Subwoofer mute Tan Radio Wiring Diagrams, without Amplifier for Mercury Grand Marquis LS 2001 List of elements for Radio Wiring Diagrams, without Amplifier for Mercury Grand Marquis LS 2001: 31 (behind right kick panel) g203 Antenna Battery junction box (right front of engine compt, behind battery) C232 Central junction box (below dash, left of steering column) Front control unit Fuse 25a Fuse 5a Fused ignition G203 (behind right kick panel) Ground Hot at all times Hot in run or acc Illum power Interior lights system L front spkr (+) L front spkr (-) L rear spkr (+) L rear spkr (-) Left front speaker Left rear speaker Nca Power R front spkr (+) R front spkr (-) R rear spkr (+) R rear spkr (-) Right front speaker Right rear speaker S204 S213
SHIFT INTERLOCKS Shift Interlock Wiring Diagram for Mercury Grand Marquis LS 2001 List of elements for Shift Interlock Wiring Diagram for Mercury Grand Marquis LS 2001: 14 (2000) (2001) Brake pedal position (bpp) switch (top of brake pedal support) Central junction box (below dash, left of steering column) Fuse 1 fuse 22 15a Fuse 5 fuse 16 15a G200 (behind left kick panel) Hot at all times Hot in run S203 S226 S243 (near breakout to multi-function switch) S265 Shift lock actuator (at bottom of steering column) Solid state
STARTING/CHARGING Charging Wiring Diagram for Mercury Grand Marquis LS 2001 List of elements for Charging Wiring Diagram for Mercury Grand Marquis LS 2001: 24 (99-00) (2001) (not used) Battery Battery junction box (right front of engine compt, behind battery) C251 C251 c256 C256 Central junction box (below dash, left of steering column) Charge indicator Fuse 10a Fuse 30a Fuse link (12 ga- gray) (at battery junction box) G101 (front of right front fender apron) G111 (near battery) Generator Hot in run Instrument cluster Red S106 S114 S231 Starter motor/ solenoid W/ analog cluster W/ digital cluster Starting Wiring Diagram for Mercury Grand Marquis LS 2001 List of elements for Starting Wiring Diagram for Mercury Grand Marquis LS 2001: 27 87a Acc Battery Battery junction box (right front of engine compt, behind battery) Charging circuit Digital transmission range (dtr) sensor (left side of transmission) Door locks (driver's door module) Fuse 30a Fuse link (12 ga- gray) (at battery junction box) G101 (front of right front fender apron) G111 (near battery) High current relay center (right rear of engine compt) Hold Ignition switch Lock Off Pull in Red Run S113 S114 S127 S267 (main harn, near breakout to ignition switch) Sta Start Starter motor relay Starter motor/ solenoid
SUPPLEMENTAL RESTRAINTS Supplemental Restraint Wiring Diagram for Mercury Grand Marquis LS 2001 List of elements for Supplemental Restraint Wiring Diagram for Mercury Grand Marquis LS 2001: 79 (analog) (analog) (digital) (behind right kick panel, near door sill) g203 (digital) (in 14401 harness, near breakout to day/night sensor/amplifier) s276 (in 14401 harness, near breakout to glove box lamp) s256 (in 14a005 harness, between splice near gray 8 cavity connector center right "c" pillar & splice near black 42 cavity connector behind right side of dash) s200 (in 14a005 harness, near breakout to adjustable pedal motor) s229 Air bag ign 2 feed Air bag ign 2 rtn Air bag indicator Air bag sliding contact (at base of steering column) C124 C2004 C2026 C250 C251 C260 C261 Central junction box (behind dash left of steering column) Data link connector Data link connector (dlc) (partial) (behind left side of dash) Driver air bag 1 Driver air bag 2 Driver buckle switch Driver igniter 1 feed Driver igniter 1 rtn Driver pretensioner Driver safety belt buckle switch Driver safety belt pretensioner Driver seat track position sensor Feed Frnt crash sens feed Frnt crash sens rtn Front crash sensor (on left front side of upper radiator support) Fuse 10a Fuse 15a G201 (behind right side of dash) Gas Ground Hot in run or start Ignition Ignitor 1 Ignitor 2 Instrument cluster power Instrument cluster warning lamps module Lighting control module (behind left side of dash) Natural gas vehicle (ngv) module (on front of radiator support) Nca Ngv Ngv analog cluster Pass belt sw input Pass ign 1 feed Pass igniter 1 rtn Passenger air bag 1 Passenger air bag 2 Passenger air bag deactivated indicator Passenger safety belt buckle switch Passenger safety belt pretensioner Passenger seat weight module (beneath front passenger seat) Passenger seat weight sensor (under front passenger seat) Pin shorting bars engaged when module connector is disconnected from harness (shorting bars are connected between pins: 11-12 & 20-21 conn. c260 2-3, 5-6 & 9-10 conn. c261 Pretensioner feed Pretensioner return Restraints control module Restraints control module (behind right side of dash, above glove box) Return S214 (in 14a005 harness, near breakout to gray 14 cavity in-line connector under left front seat assembly) S241 (in 14a005 harness, near left front door grommet) S299 (in 14401 harness, near breakout to instrument cluster connector c250) S301 (in 14a699 harness, in or near breakout to gray 14 cavity in-line connector under left front seat assembly) Seat track sens feed Sensor/buckle rtn Shorting bar Vehicle id Warning chime Warning lamp Weight module feed Weight module rtn
TRANSMISSION A/T Wiring Diagram for Mercury Grand Marquis LS 2001 List of elements for A/T Wiring Diagram for Mercury Grand Marquis LS 2001: 119 (behind air cleaner assembly) mass air- flow (maf) sensor (dash harn, near breakout to data link connector) (engine compt harn, lower left of engine) (engine compt harn, near front crash sensor) (engine compt harn, right rear of engine) (engine harn, left rear corner of engine compt) (engine harn, left rear of engine compt) (engine harn, left rear of engine compt) s129 (left side of trans- mission) (left side of trans- mission) output shaft speed (oss) sensor (left side of transmission) digital transmission range sensor (rear of left front fender apron) (rear of left front fender g101 apron) (trans harn, left rear of engine compartment) (trans harn, left rear of trans) 4r70w transmission A/c cutout Abs module, Analog Anti-theft system, Battery junction box (right front of engine compt) Bpp switch Brake pedal position (bpp) switch (top of brake pedal support) C220b Central junction box (below dash, left of steering column) Cht sens Cylinder head Data link + Data link - Data link connector Data link connector (partial) (behind left side of dash) Data link power Digital Eatc module Elect press Electronic pressure control solenoid Engine controls system Exterior lights Floor shifter (5 pass- enger vehicle) Fuse 15a Fuse 25a Fuse 30a G101 G101 (rear of left front fender apron) G201 (behind Ground Hot at all times Hot in run or start Ignition coils, radio noise capacitor Ignition power Instrument cluster Instrument cluster, cruise control, electronic suspension Intake air Intake air temp Kapwr Lighting control module, instrument cluster Maf return Maf sensor sig Multi- function switch Ngv module Output shaft Overdrive cancel switch (6 passenger vehicle) Passive anti-theft system control module Pcm power diode Pcm power relay Powertrain control module (pcm) (left side of firewall) R p Red Red red Ref votage Relay center box 1 (left side of engine compt) Right kick panel) S100 S105 S115 S119 S123 S125 S126 S132 S134 S135 S147 S148 S155 S223 S263 S265 S276 S296 S297 Shift sol a Shift sol b Shift solenoids Signal control Speed control deactivator switch Ss a Ss b System Tci lamp Temperature (cht) sensor (top left front of engine) Temperature (iat) sensor (left front of engine) compt) Throttle position (tp) sensor (left side of throtle body) To a/c Torque conv Torque converter clutch (tcc) solenoid Tps signal Tr1 Tr2 Tr3 Tr4 Trans cntrl sw Trans control indicator lamp Trans temp Transmission fluid temperature sensor Vehicle speed sensor Vss (-) Vss signal Warning lamps module,
TRUNK, TAILGATE, FUEL DOOR Trunk, Tailgate, Fuel Door Wiring Diagrams, with Keyless Entry for Mercury Grand Marquis LS 2001 List of elements for Trunk, Tailgate, Fuel Door Wiring Diagrams, with Keyless Entry for Mercury Grand Marquis LS 2001: 30 (behind left kick panel, near connector bracket) (main harn, near breakout to 16 pin in-line conn, behind left kick panel) (near beakout to park brake switch) (near bpp switch) Battery junction box C2027 C2029 C254 C519 C520 Circuit breaker 20a Decklid ajar switch Demand lighting output Driver's door module (in center of left front door) G203 (behind right kick panel) Hot at all times Instrument cluster (digital only) Lighting control module (lcm) (behind left side of dash) Luggage compt lid lamp Release out Release sw S216 S245 S295 S403 S500 S506 (body harn, near breakout to left heated mirror) Trunk ajar input Trunk lid release solenoid/ajar switch (center rear of trunk lid, part of latch assembly) Trunk lid release switch Trunk, Tailgate, Fuel Door Wiring Diagrams, without Keyless Entry for Mercury Grand Marquis LS 2001 List of elements for Trunk, Tailgate, Fuel Door Wiring Diagrams, without Keyless Entry for Mercury Grand Marquis LS 2001: 30 (behind left kick panel, near connector bracket) (near bpp switch) (police only) Battery junction box (right front of engine compt, behind battery) C2027 C2029 C254 Central junction box (below dash, left of steering column) Circuit breaker 20a Decklid ajar switch Demand lighting output Fuse 20a G203 (behind right kick panel) Hot at all times Hot in acc or run Instrument cluster (digital only) Lighting control module (lcm) (behind left side of dash) Luggage compt lid lamp Near connector bracket) S205 (behind right side of dash) S216 S245 S273 (main harn, near breakout to 16 pin in-line conn, behind left kick panel) S295 (near beakout to park brake switch) S403 Trunk ajar input Trunk lid release solenoid/ajar switch (center rear of trunk lid, part of latch assembly) Trunk lid release switch Trunk lid release switch (1) Trunk lid release switch (2)
WARNING SYSTEMS Warning System Wiring Diagrams for Mercury Grand Marquis LS 2001 List of elements for Warning System Wiring Diagrams for Mercury Grand Marquis LS 2001: 100 (behind right kick panel) g203 (body harness, under left front seat assembly) s214 (police only) (w/ police) (w/o police) Ajar lamp output Analog Autolamp delay Autolamp enable Autolamp on/off B+ to module C2026 C2027 C2029 C255 C260 C261 C262 Central junction box (behind dash, left of steering column) Circuit breaker 20a Computer data lines system Courtesy lps out Day/night sensor amplifier (on top left side of dash above instru- ment cluster) Decklid ajar Def relay output Defogger system Demand lt out Digital Dimming out Dimming output Dlc Dome lamp sw Door handle sw Door locks input Door locks system Driver safety belt buckle switch Driver seat track position sensor Driver's ajar sw Exterior lights system Fasten belts input c251 c256 Flasher output Flasher pwr in Fuse 10a Fuse 15a G203 (behind right kick panel) Ground Hazard ind Head Headlamp sw Headlamp switch assembly Headlights system Heated backlt sw Horn relay output Horns system Hot at all times Hot in run or accy Hot in run or start Ignition Instrument cluster Instrument cluster system Interior lights system Key in Key warning switch Left front door latch switch Left rear door latch switch Lighting control module (lcm) (behind left side of dash) Low beams out Nca Off Panel dim down Panel dim up Panic alarm Park Parklamp output Parklamp sw Pass. ajar sw Passenger safety belt buckle switch Passenger seat weight module (beneath front passenger seat) Passenger seat weight sensor (under fornt passenger seat) Restraints control module (behind right side of dash, above glove box) Right front door latch switch Right rear door latch switch S2009 S207 S227 S229 S259 (body harn, near right "a" pillar) S276 S285 S301 (front seat harn, under left front seat assembly) S500 S600 Seatbelt ind Seatbelt sw Sound tone output Tone req Trunk, tailgate, fuel doors system W/ police W/o police Wiper/washer system
WIPER/WASHER Wiper/Washer Wiring Diagram for Mercury Grand Marquis LS 2001 List of elements for Wiper/Washer Wiring Diagram for Mercury Grand Marquis LS 2001: 32 (behind left side of dash) (behind right kick panel) 100k ohms 3.3k ohms 4.08k 7.25k C2027 Central junction box (below dash, left of steering column) Fuse 30a G101 (front of right fender) G203 Hot in acc or run Int max Int min Lighting control module (behind left side of dash) Multi- function switch Off Off 36.27k ohms Ohms Parked Parking Red Run S112 S203 S207 S253 S266 Wash Windshield washer pump (in fluid reservoir) Windshield wiper motor (top center of firewall) Wiper control module (behind center of of dash, above warning lamp module)
