ELECTRICAL COMPONENT LOCATOR 1991 HONDA ELECTRICAL COMPONENTS

Honda Prelude 2.0 Si 1991 - BUZZERS, RELAYS & TIMERS

Honda Prelude 2.0 Si 1991 BUZZERS, RELAYS & TIMERS LOCATION

Component	Location
ABS Motor Relay
Fuse & Relay Block	Right side of engine compartment in relay box. See Fig. 1 .
ABS Component Location	Right side of engine compartment in relay box. See Fig. 2 .
ABS Fail Safe Relay (Front & Rear)
Fuse & Relay Block	Right side of engine compartment in relay box. See Fig. 1 .
ABS Component Location	Right side of engine compartment in relay box. See Fig. 2 .
A/C Comp. Clutch Relays "A" & "B"	In right front corner of engine compartment, on battery tray. See Fig. 3 .
Antenna Retractor Relay	In right side of trunk, near antenna.
Cigarette Lighter Relay	Behind left side of dash, below cruise control unit
Condenser Fan Relay	In engine compartment fuse/relay block. See Fig. 1 .
Cooling Fan Timer Unit	Below right side of dash, below kick panel. See Fig. 4 .
Dimmer Relay	In engine compartment fuse/relay block. See Fig. 1 .
Foglight Relay	Behind left kick panel, on relay holder. See Fig. 5 .
Headlight Retractor Relays
Left	In left front corner of engine compartment. See Fig. 6 .
Right	In right front corner of engine compartment. See Fig. 7 .
Lighting Relay	In engine compartment fuse/relay block. See Fig. 1 .
PGM-FI Main Relay	Behind left side of dash, next to fuse block. See Fig. 8 .
Power Window Relay	Behind left kick panel, on relay holder. See Fig. 5 .
Radiator Fan Relay	In engine compartment fuse/relay block. See Fig. 1 .
Rear Window Defogger Relay	Behind left kick panel, on relay holder. See Fig. 5 .
Seat Belt Warning Chime	Center of windshield header.
Starter Relay	Behind left side of dash, above cruise control unit. See Fig. 5 .
Sun Roof Relays (Open & Close)	Behind left kick panel, on relay holder. See Fig. 5 .
Turn Signal/Hazard Relay	Behind left kick panel, on relay holder. See Fig. 5 .

Honda Prelude 2.0 Si 1991 - CIRCUIT PROTECTION DEVICES

Honda Prelude 2.0 Si 1991 CIRCUIT PROTECTION DEVICES LOCATION

Component	Location
Passenger Compartment Fuse Block	Under left side of dash. See Fig. 8 .
Passenger Compartment Relay Block	Below left side of dash at kick panel. See Fig. 5 .
Engine Compartment Fuse/Relay Block	In front of right wheelwell. See Fig. 1 .

Honda Prelude 2.0 Si 1991 - CONTROL UNITS

Honda Prelude 2.0 Si 1991 CONTROL UNITS LOCATION

Component	Location
ABS Control Unit	Below center of dash. See Fig. 2 .
A/C Compressor Control Unit	Behind right side of dash, right of glove box.
Automatic Transmission Control Unit
2.0L	Behind center of dash.
2.1L	Under passenger side footwell, by ECU control unit.
Cruise Control Unit	Behind left side of dash. See Fig. 5 .
Dash Light Brightness Control Unit	Behind dash lower left panel. See Fig. 9 .
Electronic Control Unit (ECU)	On passenger side footwell, under carpet.
Ignitor Unit (EFI)
View of Ignitor Unit	Near under-hood relay block. See Fig. 10 .
2.0L EFI	Near under-hood relay block. See Fig. 11 .
Integrated Control Unit	Behind center of dash, near heater unit. See Fig. 12 .
Retractable Headlight Control Unit	Behind right side of dash, right of glove box.
Power Door Lock Control Unit	In passenger door, above speaker.

Honda Prelude 2.0 Si 1991 - SENDING UNITS & SENSORS

Honda Prelude 2.0 Si 1991 SENDING UNITS & SENSORS LOCATION

Component	Location
ABS Speed Sensors	On each wheel hub assembly. See Fig. 2 .
Atmospheric Pressure Sensor	On passenger side floorboard, by ECU.
Auto. Trans. Speed Pulser	On right side of transmission.
Brakelight Failure Sensors	In each taillight.
Coolant Temperature Gauge Sender	On top right front of engine.
Coolant Temperature Sensor	At right front of engine, near thermostat housing. See Fig. 11 .
Cooling Fan Temperature Sensor	On bottom right corner of radiator.
Cylinder Sensor	In distributor. See Fig. 11 .
EGR Valve Lift Sensor	On top of EGR valve. See Fig. 11 .
Evaporator Sensor	Behind dash, on evaporator.
Intake Air Temperature Sensor	On intake manifold chamber. See Fig. 11 .
MAP Sensor	In control box.
TDC/Crank Sensor	In distributor. See Fig. 11 .
Throttle Angle Sensor	On top of throttle body. See Fig. 11 .
Vehicle Speed Sensor	On top of power steering speed sensor on transaxle.

Honda Prelude 2.0 Si 1991 - MOTORS

Honda Prelude 2.0 Si 1991 MOTORS LOCATION

Component	Location
ABS Motor	Lower right of engine compartment, below battery tray. See Fig. 2 .
A/C-Heater Blower Motor	Under right side of dash.
A/C Condenser Fan Motor	Behind left side of radiator.
Cruise Control Actuator Motor	In left front corner of engine compartment.
Headlight Retractor Motors	Behind each headlight assembly.
Heater Function Control Motor	Behind center of dash, to left of heater case.
Heater Recirculation Control Motor	On blower heater case.
Radiator Cooling Fan Motor	Behind radiator.
Sun Roof Motor	Center rear of roof.
Power Antenna Motor	In right side of trunk.
Washer Motor	Behind left front bumper, below washer fluid reservoir.
Wiper Motor	In left rear corner of engine compartment.

Honda Prelude 2.0 Si 1991 - SOLENOIDS & SOLENOID VALVES

Honda Prelude 2.0 Si 1991 SOLENOIDS & SOLENOID VALVES LOCATION

Component	Location
ABS Modulator Solenoid	Lower right front of engine compartment, under control box. See Fig. 2 .
By-Pass Control Solenoid Valve (2.0L EFI)	In control box.
EGR Valve Control Solenoid	In control box.
Electronic Air Control Valve	On top of engine. See Fig. 11 .
Key Interlock Solenoid	Attached to ignition switch assembly.
Lock-Up Control Solenoid Valve (A & B)	On right front of transaxle.
Purge Cut-Off Solenoid Valve
2.0L EFI	Below control box. See Fig. 11 .
2.1L EFI	In control box.
Seat Belt Retractor Solenoids	In each seat belt retractor.
Shift Control Solenoid Valve (A/T)	On right front side of transmission.
Shift Lock Solenoid	Below right front side of console.

Honda Prelude 2.0 Si 1991 - SWITCHES

Honda Prelude 2.0 Si 1991 SWITCHES LOCATION

Component	Location
ABS Pressure Switch	Lower right front engine compartment, below battery tray. See Fig. 2 .
A/C Pressure Switch	On receiver-drier.
Back-Up Light Switch (M/T)	On top right side of transmission.
Brake Fluid Level Switch	On brake fluid reservoir cap.
Brakelight Switch	On top of brake pedal support.
Clutch Switch	On top of clutch pedal support.
Coolant Temperature Switch "A"	In radiator, near cooling fan.
Coolant Temperature Switch "B"	On thermostat housing.
Key Interlock Switch	Attached to ignition switch assembly.
Neutral Safety Switch (A/T)	Under center console, near gear selector lever.
Oil Pressure Switch	Rear of engine, above oil filter.
Power Steering Oil Pressure Switch	On left rear of engine compartment. See Fig. 11 .
Seat Belt Switches	In each seat belt buckle assembly.
Shift Position Switch	Under center console, near gear selector lever.

Honda Prelude 2.0 Si 1991 - MISCELLANEOUS

Honda Prelude 2.0 Si 1991 MISCELLANEOUS LOCATION

Component	Location
A/C Diodes	At right front of vehicle, behind bumper.
Blower Resistor	On blower housing.
Control Box	In right rear of engine compartment. See Fig. 11 .
Fuel Injector Resistor
View of Fuel Injector Resistor	At center of firewall. See Fig. 13 .
2.0L EFI	At center of firewall. See Fig. 11 .
Ignition Timing Check Connector	Behind ignition coil.
Radio Noise Condenser	In right rear of engine compartment, on ignition coil.
Speed Pulser (A/T)	On right side of transmission, near starter.