The Buick Regal, manufactured from 1988 to1993, exemplifies Buick’s blend of luxury and performance in the mid-size sedan category. The vehicle’s electrical system includes critical components such as the fuse box and relays.
The fuse box in the Buick Regal 1988–1993 houses fuses designed to protect electrical circuits from overloads and short circuits, safeguarding components like headlights, taillights, and power windows. Relays, functioning as electrically operated switches, manage the flow of electricity to systems such as the starter motor, fuel pump, and cooling fans, ensuring reliable operation.
Additional electrical components in the Buick Regal of this era likely include climate control systems, power-adjustable seats, and audio systems. These features rely on a robust electrical infrastructure to provide comfort, convenience, and entertainment for occupants.
Understanding the layout and function of the fuse box and relays is crucial for maintaining and troubleshooting the Buick Regal 1988–1993’s electrical systems. Regular inspection and maintenance of these components help ensure the vehicle’s reliability and performance, preserving its legacy as a sophisticated and reliable sedan in Buick’s lineup during that period.
(1988–1993) Buick Regal fuse box and relay with Diagram
WARNING
- Never replace a fuse with one that has a higher amperage rating.
- A fuse with a too-high amperage could damage the electrical part and cause a fire.
- On no account should fuses be repaired (e.g. patched up with tin foil or wire) as this may cause serious damage elsewhere in the electrical circuit or cause a fire.
- If a fuse blows repeatedly, do not keep replacing it. Instead, have the cause for the repeated short circuit or overload tracked and fixed.
- Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.
Buick Regal 1988–1993 fuse assignment
Year of production: 1988, 1989, 1990, 1991, 1992, 1993
Fuses and Circuit Breakers
This fuse panel is inside the glove box. Pull the cover down for access. Some spare fuses and a fuse puller are included.
| Fuses | Amp | Usage |
| 1 | 10A | Radio & Clock |
| 2 | 15A | Radio & Clock; Instrument Cluster; Passive Restraint Timer |
| 3 | 15A | Courtesy, Glove Box, Underhood, Trunk, Header Lights; Cigarette Lighter; Lighted Inside Rearview Mirror; Power Door Locks; Power Mirrors |
| 4 | 25A | Windshield Wiper & Washer |
| 5 | 10A | Cruise Control: DRL Module; Instrument Cluster; HVAC |
| 6 | 15A | Brake Lights; ABS Control Module; Chime Module |
| 7 | 15A | Engine Control Module |
| 8 | 20A | Taillights; DRL Module |
| 9 | 15A | Hazard Warning Flasher |
| 10 | 10A | Rear Defogger Timer Relay: Instrument Cluster; Chime Module; Cruise Control; DRL Module; Lamp Driver Module; ABS Lamp Driver |
| 11 | 5A | Instrument Panel. Console, Switch Lights |
| 12 | 25A | Blower Motor |
| 13 | 10A | Turn Signals |
| 14 | Not Used | |
| 15 | 10A | ABS Control Module |
| 16 | Not Used | |
| 17 | Not Used | |
| 18 | Not Used |
Electrical Center Driver Side – Underhood
| Mini Fuse | Amp | Usage |
| 1 | Not Used | |
| 2 | Not Used | |
| 3 | Not Used | |
| 4 | Not Used | |
| 5 | Not Used | |
| 6 | Not Used | |
| 7 | Not Used | |
| 8 | 5A | ABS Control Module |
| 9 | 15A | Fog Lights |
| 10 | 10A | Horn |
| 11 | Not Used | |
| 12 | Not Used | |
| 13 | 60A | ABS Controller |
| 14 | 50A | Exterior Lights |
| Relay | Amp | Usage |
| 15 | Horn | |
| 16 | Fog Lamps | |
| 17 | ABS |
If your car has anti-lock brakes, there is an ABS electrical center under the hood on the driver’s side.
Electrical Center Passenger Side – Underhood
| Fuse | Amp | Usage |
| 18 | 20A | Fuel Injectors (3.8L) |
| 19 | 15A | Trunk Release |
| 20 | 20A | ECM; Fuel Pump |
| 21 | 10A | ECM (3.8L) |
| 22 | 3A | Cooling Fan Relay (3.8L) |
| 23 | Not Used | |
| 24 | 10A | Direct Ignition System |
| 25 | 10A | Fuel Injectors (3.1 L) |
| 26 | Not Used | |
| 27 | 15A | Ignition |
| 28 | 10A | TCC; Primary Cooling Fan (3.1 L) |
| Relay | Amp | Usage |
| 29 | Fuel Pump | |
| 30 | Cooling Fan Control (3.8L) | |
| 31 | Cooling Fan Control (3.8L) Secondary Cooling Fan | |
| 32 | Primary Cooling Fan | |
| 33 | A/C Clutch Coil |
| Fusible Elements | Amp | Usage |
| 34 | 60A | Starter Solenoid |
| 35 | 60A | Cooling Fan |
| 36 | 60A | Blower Motor |
| 37 | 60A | Cooling Fan |
| 38 | 30A | Fuse Block |
Conclusion
For owners and enthusiasts of classic Buick Regal models from 1988–1993, understanding the fuse box and relay systems is essential for vehicle maintenance. Regular inspection and maintenance of these components helped ensure the vehicle’s longevity and reliability, preserving its status as a symbol of Buick’s craftsmanship and innovation in the automotive industry during that era.
