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FUSES & CIRCUIT BREAKERS Fuses & Circuit Breakers 1988-93 Buick
Buick Regal Custom 1993 - FUSES & CIRCUIT BREAKERS
The fuse box is located behind a panel in the glove box. The electrical centers are located under the hood. For fuse identification of models and years not shown, refer to Fuse Usage chart on fuse panel cover.
Buick Regal Custom 1993 - ELECTRICAL COMPONENT LOCATIONS
Fig. 1: Buick Regal Custom 1993 - Component Locations - Electrical Component Locations (Typical)
Buick Regal Custom 1993 - FUSE PANEL IDENTIFICATION
Fig. 2: Buick Regal Custom 1993 - Component Locations - Fuse Panel Identification (1988-90)
Buick Regal Custom 1993 - Fuse and Circuit Breaker Identification
- 1 - 10 Amp: Radio, Power Antenna
- 2 - 15 Amp: Radio, Instrument Cluster
- 3 - 15 Amp: ECM
- 4 - 25 Amp: Wiper/Washer
- 5 - 5 Amp: Instrument Panel Lights
- 6 - Not Used
- 7 - 15 Amp: Horns, Horn Relay
- 8 - 10 Amp: Turn Signals, Parking Light Relay
- 9 - 10 Amp: Heater/Air Conditioner, Instrument Cluster, Cruise Control
- 10 - 20 Amp: Stoplights/Hazard Flashers, Chime Module
- 11 - 10 Amp: Indicator Lights, Rear Defogger Relay, Converter Clutch, Chime Module, Headlight Switch Light
- 12 - Not Used
- 13 - 20 Amp: Side Marker Lights, Parking Lights, Tail Lights, Fog Light Relay
- 14 - 15 Amp: Cigar Lighter, Interior Lamps, Power Mirrors, Door Lock Relay
- 15 - 25 Amp: Low/Medium Blower Motor Relay
- 16 - 10 Amp: Passive Restraint Belts
- 17 - 5 Amp: Instrument Cluster
- 18 - 10 Amp: Air Conditioning Solenoid
Buick Regal Custom 1993 - Component Center Identification
Fig. 3: Buick Regal Custom 1993 - Component Locations - Component Center Identification (1988-90)
- 1 - Defogger Timer Relay
- 2 - Air Conditioning Blower Relay
- 3 - Air Conditioning Blower Relay
- 4 - Rear Defogger Circuit Breaker (30 Amp)
- 5 - Power Accessories Circuit Breaker (30 Amp)
- 6 - Power Windows Circuit Breaker (30 Amp)
- 7 - Headlight Circuit Breaker (20 Amp)
- 8 - Not Used
- 9 - Chime Module
- 10 - Hazard Flasher
Buick Regal Custom 1993 - Driver-Side Underhood Electrical Center ID (1988-90)
- 1 - Fuel Pump Relay
- 2 - ECM & Fuel Pump Fuse (20 Amp)
Buick Regal Custom 1993 - Forward Light Electrical Center Identification
Fig. 5: Buick Regal Custom 1993 - Component Locations - Forward Light Electrical Center (1988-90)
- A - Foglight Relay Fuse (15 Amp)
- B - Foglight Relay
- C - Horn Relay
- D - Park-Turn Module
Buick Regal Custom 1993 - Passenger-Side Underhood Electrical Center ID (1988-90)
WARNING: Always disconnect battery ground cable before servicing "high-current" fuses. It is recommended that "high-current" fuses be replaced by a qualified technician.
Buick Regal Custom 1993 - Fuse & Circut Breaker Identification
- 1 - 20 Amp: Fuel Injectors (3.8L)
- 2 - 15 Amp: Trunk Release, Back-Up Lights (1993)
- 3 - 20 Amp: ECM, Fuel Pump
- 4 - 10 Amp: ECM (3.8L)
- 5 - 3 Amp: Cooling Fan Relay (3.8L)
- 6 - Not Used
- 7 - 10 Amp: Direct Ignition System
- 8 - 10 Amp: Fuel Injectors
- 9 - Not Used
- 10 - 15 Amp: Ignition, Back-Up Lights, A/C Coil, Secondary Cooling Fan, Generator, Digital EGR, Purge Canister, Back-Up Lights
- 11 - 10 Amp: TCC, Primary Cooling Fan (3.1L)
- 12 - Relay: Fuel Pump
- 13 - Relay: Cooling Fan Control (3.8L)
- 14 - Relay: Secondary Cooling Fan
- 15 - Relay: Primary Cooling Fan
- 16 - Relay: A/C Clutch Coil
- 17 - 60 Amp: Starter Solenoid
- 18 - 60 Amp: Cooling Fan
- 19 - 60 Amp: Blower Motor
- 20 - 60 Amp: Cooling Fan
- 21 - 30 Amp Fuse Block
Buick Regal Custom 1993 - Fuse Panel Identification (1991)
Fig. 7: Buick Regal Custom 1993 - Component Locations - Fuse Panel Identification (1991)
Buick Regal Custom 1993 - Fuse & Circuit Breaker Identification
- 1 - 10 Amp: Radio, Power Antenna
- 2 - 15 Amp: Radio, Instrument Cluster
- 3 - 15 Amp: Horns, Horn Relay
- 4 - 25 Amp: Wiper/Washer
- 5 - 5 Amp: Instrument Panel Lights
- 6 - 15 Amp: Courtesy, Power Options, Cigarette Lighter
- 7 - 15 Amp: ECM
- 8 - 10 Amp: Turn Signals, Parking Light Relay
- 9 - 15 Amp: Stoplight
- 10 - 20 Amp: Stoplights/Hazard Flashers, Chime Module, Instrument Cluster, Cruise Control
- 11 - 5 Amp: Instrument Panel Lights
- 12 - 10 Amp: Anti-Lock Brakes
- 13 - 20 Amp: Side Marker Lights, Parking Lights, Tail Lights, Fog Light Relay, Chime
- 14 - 10 Amp: Tail Lights
- 15 - 20 Amp: Air Conditioning
- 16 - 10 Amp: Passive Restraint Belts
- 17 - 5 Amp: Instrument Cluster
- 18 - 10 Amp: Air Conditioning Solenoid
Buick Regal Custom 1993 - Component Center Identification (1991)
Fig. 8: Buick Regal Custom 1993 - Component Locations - Component Center Identification (1991)
- 1 - Defogger Timer Relay
- 2 - Air Conditioning Blower Relay
- 3 - Air Conditioning Blower Relay
- 4 - Rear Defogger Circuit Breaker (30 Amp)
- 5 - Power Accessories Circuit Breaker (30 Amp)
- 6 - Power Windows Circuit Breaker (30 Amp)
- 7 - Headlight Circuit Breaker (20 Amp)
- 8 - Not Used
- 9 - Chime Module
- 10 - Hazard Flasher
Buick Regal Custom 1993 - Driver-side Underhood Electrical Center Identification (1991)
- 1 - Fuel Pump Relay
- 2 - ECM & Fuel Pump Fuse (20 Amp)
Buick Regal Custom 1993 - Forward Light Electrical Center Identification (1991)
Fig. 10: Buick Regal Custom 1993 - Component Locations - Forward Light Electrical Center (1991)
- A - Foglight Relay Fuse (15 Amp)
- B - Foglight Relay
- C - Horn Relay
- D - Park/Turn Module
Buick Regal Custom 1993 - Passenger-Side Underhood Electrical Center Identification (1991)
WARNING: Always disconnect battery ground cable before servicing "high-current" fuses. It is recommended that "high-current" fuses be replaced by a qualified technician.
Buick Regal Custom 1993 - Fuse and Circuit Breaker Identification
- 1 - 20 Amp: Fuel Injectors (3.8L)
- 2 - 15 Amp: Trunk Release, Back-Up Lights (1993)
- 3 - 20 Amp: ECM, Fuel Pump
- 4 - 10 Amp: ECM (3.8L)
- 5 - 3 Amp: Cooling Fan Relay (3.8L)
- 6 - Not Used
- 7 - 10 Amp: Direct Ignition System
- 8 - 10 Amp: Fuel Injectors
- 9 - Not Used
- 10 - 15 Amp: Ignition, Back-Up Lights, A/C Coil, Secondary Cooling Fan, Generator, Digital EGR, Purge Canister, Back-Up Lights
- 11 - 10 Amp: TCC, Primary Cooling Fan (3.1L)
- 12 - Relay: Fuel Pump
- 13 - Relay: Cooling Fan Control (3.8L)
- 14 - Relay: Secondary Cooling Fan
- 15 - Relay: Primary Cooling Fan
- 16 - Relay: A/C Clutch Coil
- 17 - 60 Amp: Starter Solenoid
- 18 - 30 Amp: Cooling Fan (Primary & Secondary)
- 19 - 60 Amp: Blower Motor
- 20 - 60 Amp: Cooling Fan
- 21 - 30 Amp: Fuse Block
Buick Regal Custom 1993 - Fuse Panel Identification (1992-93)
Fig. 12: Buick Regal Custom 1993 - Component Locations - Fuse Panel Identification (1992-93)
- 1 - 10 Amp: Radio, Clock
- 2 - 10 Amp: Radio, Clock, Instrument Cluster, Passive Restraint Lockout, Passive Restraint Timer, Trip Computer & Light Monitor
- 3 - 15 Amp: Door Lock, Courtesy/Glove Box/Underhood/Trunk/Header Lights, Cigarette Lighter, Door Handle, Visor Mirror, Lighted Inside Rearview Mirror, Outside Power Mirrors, Dome Light
- 4 - 25 Amp: Windshield Wiper/Washer
- 5 - 10 Amp: Temp Door Motor, DRL Module, HVAC, Rear Defogger, Instrument Cluster, HUD Dimmer, HUD Module, Compass, Cruise Control, Light Monitor Module
- 6 - 15 Amp: Brakelights, ABS Control Module, Chime Module
- 7 - 15 Amp: Engine Control Module
- 8 - 20 Amp: Taillights, Radio/Clock, HVAC, Chime Module, DRL Module, Compass, Light Monitor, Foglight Relay
- 9 - 15 Amp: Hazard Warning Flasher
- 10 - 10 Amp: Rear Defogger Timer Relay, Instrument Cluster, Chime Module, Cruise Control, DRL Module, Light Driver Module, ABS Light Driver
- 11 - 5 Amp: Instrument Panel, Console, Switch Lights
- 12 - 25 Amp: Blower Motor, SOL Box
- 13 - 10 Amp: Turn Signals, Flasher
- 14 - Not Used
- 15 - 10 Amp: ABS Control Module
- 16 - Not Used
- 17 - Not Used
- 18 - Not Used
Buick Regal Custom 1993 - Component Center Identification (1992-93)
Fig. 13: Buick Regal Custom 1993 - Component Locations - Component Center Identification (1992-93)
- 1 - Defogger Timer Relay
- 2 - Air Conditioning Blower Relay
- 3 - Air Conditioning Blower Relay
- 4 - Rear Defogger Circuit Breaker (30 Amp)
- 5 - Power Accessories Circuit Breaker (30 Amp)
- 6 - Power Windows Circuit Breaker (30 Amp)
- 7 - Headlight Circuit Breaker (20 Amp)
- 8 - Blank
- 9 - Chime Module
- 10 - Hazard Flasher
Buick Regal Custom 1993 - Anti-Lock Brake Power Center Identification
Fig. 14: Buick Regal Custom 1993 - Component Locations - Anti-Lock Brake Power Center Identification
- 1 - Front Enable Relay
- 2 - Rear Enable Relay
- 3 - Pump Motor Fusible Element (30 Amp)
- 4 - Electronic Brake Valve Fusible Element (30 Amp)
- 5 - Controller Fuse (10 Amp)
- 6 - Electronic Brake Valve Fuse (15 Amp)
Buick Regal Custom 1993 - Driver-Side Underhood Electrical Center Identification (Typical 1992-93)
WARNING: Always disconnect battery ground cable before servicing "high-current" fuses. It is recommended that "high-current" fuses be replaced by a qualified technician.
Buick Regal Custom 1993 - Fuse & Circuit Breaker Identification
- 1 - Not Used
- 2 - Not Used
- 3 - Not Used
- 4 - Not Used
- 5 - Not Used
- 6 - Not Used
- 7 - Not Used
- 8 - 5 Amp: ABS Control Module
- 9 - 15 Amp: Foglights
- 10 - 10 Amp: Horn
- 11 - Not Used
- 12 - Not Used
- 13 - 60 Amp: ABS Controller
- 14 - 50 Amp: Exterior Lights
- 15 - Relay: Horn
- 16 - Relay: Foglights
- 17 - Relay: ABS
Buick Regal Custom 1993 - Passenger-Side Underhood Electrical Center (1992-93)
WARNING: Always disconnect battery ground cable before servicing "high-current" fuses. It is recommended that "high-current" fuses be replaced by a qualified technician.
Buick Regal Custom 1993 - Fuse & Circuit Breaker Identification
- 1 - 20 Amp: Fuel Injectors (3.8L)
- 2 - 15 Amp: Trunk Release, Back-Up Lights (1993)
- 3 - 20 Amp: ECM, Fuel Pump
- 4 - 10: ECM (3.8L)
- 5 - 3 Amp: Cooling Fan Relay (3.8L)
- 6 - Not Used
- 7 - 10 Amp: Direct Ignition System
- 8 - 10 Amp: Fuel Injectors
- 9 - Not Used
- 10 - 15 Amp: Ignition, Back-Up Lights, A/C Coil, Secondary Cooling Fan, Generator, Digital EGR, Purge Canister, Back-Up Lights
- 11 - 10 Amp: TCC, Primary Cooling Fan (3.1L)
- 12 - Relay: Fuel Pump
- 13 - Relay: Cooling Fan Control (3.8L)
- 14 - Relay: Secondary Cooling Fan
- 15 - Relay: Primary Cooling Fan
- 16 - Relay: A/C Clutch Coil
- 17 - 60 Amp: Starter Solenoid
- 18 - 60 Amp: Cooling Fan
- 19 - 60 Amp: Blower Motor
- 20 - 60 Amp: Cooling Fan
- 21 - 30 Amp: Fuse Block
Buick Regal Custom 1993 - BATTERY SPECIFICATIONS
CAUTION: When battery is disconnected, vehicles equipped with computers may lose memory data. When battery power is restored, driveability problems may exist on some vehicles. These vehicles may require a relearn procedure. See the COMPUTER RELEARN PROCEDURES article in the GENERAL INFORMATION section.
Buick Regal Custom 1993 - CAUTIONS & WARNINGS ANTI-LOCK BRAKE SYSTEM
The anti-lock brake system contains electronic equipment that can be susceptible to interference caused by improperly installed or high output radio transmitting equipment. Since this interference could cause the possible loss of the anti-lock braking capability, such equipment should be installed by qualified professionals.
On models equipped with anti-lock brake systems, ALWAYS observe the following cautions:
- DO NOT attempt to bleed hydraulic system without first referring to the appropriate ANTI-LOCK BRAKE SYSTEM article in the BRAKES Section.
- DO NOT mix tire sizes. As long as tires remain close to the original diameter, increasing the width is acceptable. Rolling diameter must be identical for all 4 tires. Some manufacturers recommend tires of the same brand, style and type. Failure to follow this precaution may cause inaccurate wheel speed readings.
- Use ONLY recommended brake fluids. DO NOT use silicone brake fluids in an ABS-equipped vehicle.
Buick Regal Custom 1993 - REPLACING BLOWN FUSES
Before replacing a blown fuse, remove ignition key, turn off all lights and accessories to avoid damaging the electrical system. Be sure to use fuse with the correct indicated amperage rating. The use of an incorrect amperage rating fuse may result in a dangerous electrical system overload.
Buick Regal Custom 1993 - BATTERY WARNING
WARNING: When battery is disconnected, vehicles equipped with computers may lose memory data. When battery power is restored, driveability problems may exist on some vehicles. These vehicles may require a relearn procedure. See COMPUTER RELEARN PROCEDURES article in GENERAL INFORMATION section.
Buick Regal Custom 1993 - BRAKE PAD WEAR INDICATOR
Indicator will cause a squealing or scraping noise, warning that brake pads need replacement.
Buick Regal Custom 1993 - CATALYTIC CONVERTER
To prevent catalytic converter overheating, DO NOT allow engine to idle for more than 20 minutes.
Buick Regal Custom 1993 - COOLANT (DEX-COOL 1995-96 MODELS)
CAUTION: Some 1995 build-out and all 1996 models have DEX-COOL engine coolant installed at the factory. DEX-COOL coolant is a silicate-free coolant that is orange in color.
It should not be mixed with regular ethylene-glycol coolant. To avoid possible damage to vehicle cooling system, visually check engine coolant color before adding and/or changing engine coolant. Vehicle should have an identification label placed under the hood stating what type coolant is installed.
Buick Regal Custom 1993 - COOLANT (PROPYLENE-GLYCOL FORMULATIONS)
CAUTION: To avoid possible damage to vehicle use only ethylene-glycol based coolants with a mixture ratio from 44-68% anti-freeze. DO NOT use 100% anti-freeze as it will cause the formation of cooling system deposits. This results in coolant temperatures of over 300? F (149?C) which can melt plastics. 100% anti-freeze has a freeze point of only -8? F (-22?C).
CAUTION: Propylene-Glycol Mixtures has a smaller temperature range than Ethylene-Glycol. The temperature range (freeze-boil) of a 50/50 Anti-Freeze/Water Mix is as follows: Propylene-Glycol -26? F (-32?C) - 257? F (125?C) Ethylene-Glycol -35? F (-37?C) - 263? F (128?C)
CAUTION: Propylene-Glycol/Ethylene-Glycol Mixtures can cause the destabilization of various corrosion inhibitors. Also Propylene-Glycol/Ethylene-Glycol has a different specific gravity than Ethylene-Glycol coolant, which will result in inaccurate freeze point calculations.
Buick Regal Custom 1993 - ELECTROSTATIC DISCHARGE SENSITIVE (ESD) PARTS
WARNING: Many solid state electrical components can be damaged by static electricity (ESD). Some will display a warning label, but many will not. Discharge personal static electricity by touching a metal ground point on the vehicle prior to servicing any ESD sensitive component.
Buick Regal Custom 1993 - FUEL SYSTEM SERVICE
WARNING: Relieve fuel system pressure prior to servicing any fuel system component.
Buick Regal Custom 1993 - HALOGEN BULBS
WARNING: Halogen bulbs contain pressurized gas which may explode if overheated. DO NOT touch glass portion of bulb with bare hands. Eye protection should be worn when handling or working around halogen bulbs.
Buick Regal Custom 1993 - METHANOL GASOLINE
CAUTION: Fuel that is more than 5% methanol should not be used in this vehicle. It can corrode metal parts in the fuel system, and damage plastic and rubber parts. Even at 5% methanol or less, solvents and corrosion preventers must be used with this fuel to avoid these problems.
Buick Regal Custom 1993 - RADIATOR CAP
CAUTION: Always disconnect the fan motor when working near the radiator fan. The fan is temperature controlled and could start at any time even when the ignition key is in the OFF position. DO NOT loosen or remove radiator cap when cooling system is hot.
Buick Regal Custom 1993 - RADIATOR FAN
WARNING: Keep hands away from radiator fan. Fan is controlled by a thermostatic switch which may come on or run for up to 15 minutes even after engine is turned off.
Buick Regal Custom 1993 - SPARK PLUGS
NOTE: Allow engine to cool before removing spark plugs from aluminum cylinder heads.