The Buick Roadmaster of 1993 represented a culmination of luxury and performance in the full-size sedan segment, characteristic of Buick’s tradition of craftsmanship and comfort. This model incorporated various sophisticated electrical components, including the fuse box and relays, which were pivotal in managing and safeguarding the vehicle’s electrical systems.
The fuse box in the Buick Roadmaster 1993 housed multiple fuses designed to protect electrical circuits from overloads and short circuits. These fuses played a critical role in safeguarding components such as headlights, brake lights, power windows, and the stereo system. Understanding the location and function of each fuse is important for diagnosing and resolving electrical issues effectively.
Relays in the Buick Roadmaster 1993 served as electrically operated switches that controlled the flow of electricity to specific components. These relays were integral to systems such as the starter motor, fuel pump, and cooling fans, ensuring reliable operation and optimal performance. Regular inspection and maintenance of relays were necessary to maintain the vehicle’s functionality and reliability.
In addition to these components, the Buick Roadmaster 1993 likely featured advanced electrical technologies for its time, including power-adjustable seats, climate control systems, and advanced audio systems. These amenities relied on a robust electrical infrastructure to provide enhanced comfort and convenience to occupants.
(1993) Buick Skyhawk 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 Skyhawk 1993 fuse assignment
Year of production: 1993
Fuses and Circuit Breakers
Fuse Usage (Wagon)
| Fuse | Ampere rating [A] | Usage |
| 1 | 15A | Horn Relay, Underhood Lamp, Interior Courtesy Lighting, Power Antenna Relay, Power Door Lock Switches, Power Mirror Switch, Vanity Mirrors Lamps, Rear Glass Release Relay, Rear Glass Release/Tailgate Lock Switch, Rear Glass Interlock/Push Button Switch |
| 2 | 15A | Audio Alarm Module, Cigar Lighter, I/P Compartment Lamp, Rear Wiper Motor Module, Radio, Instrument Cluster, Low Oil Module |
| 3 | 10A | Electronic A/C Control Assembly (C68), Rear Deffoger Relay (C68) |
| 4 | 25A | Electronic Level Control Compressor Assembly, Height Sensor Assembly |
| 5 | 7,5A | Interior Dimmer Lighting |
| 6 | 20A | Generator, Electronic A/C Control Assembly, Solenoid Module, A/C Control Relay, Heater and A/C Control Assembly |
| 7 | 30A | Electronic A/C Power Module (C68) |
| 8 | 15A | Rear Window Wiper/Washer Switch |
| 9 | 10A | Radio |
| 10 | 25A | Windshield Wiper/Washer Switch, Washer Fluid Level Switch |
| 11 | 7,5A | Fuel Injectors |
| 12 | 10A | Arming Sensor, Diagnostic Energy Reserve Module (DERM) |
| 13 | 10A | Engine Control Module, Knock Sensor Module, Emission Control Solenoids, Instrument Cluster, Vehicle Speed Sensor Module |
| 14 | 15A | Park/Marker/Tail Lights |
| 15 | 30A | Rear Defogger |
| 16 | 7,5A | Heated Mirrors |
| 17 | 15A | Audio Alarm Module, Defogger Relay/Timer, Diagnostic Energy Reserve Module (DERM), Electronic Compass , Low Coolant Module, Fluid Warning Center, Headlight Switch ilumination Lamp, Height Sensor Assembly, Instrument Cluster Keyless Entry Receiver, Torque Converter Clutch/Cruise Release Switch, Twilight Sentinel Module, Daytime Running Lights Module |
| 18 | 15A | Backup Lights, Turn Signal Flasher, Cruise Control, Electronic Brake Control Module |
| 19 | 20A | Brake Light, Hazard Flasher |
| 20 | 5A | Diagnostic Energy Reserve Module (DERM), Engine Control Module (EMC) |
| Circuit Breaker | Ampere rating [A] | Usage |
| A | 30A | Keyless Entry Module, Power Seat Switches, Power Door Lock Relay |
| C | 30A | Master Power Window Switch, Window Lockout Switch |
Fuse Usage (Sedan)
| Fuse | Ampere rating [A] | Usage |
| 1 | 15A | Underhood Lamp, Interior Courtesy Lighting, Power Antenna Relay, Power Door Lock, Power Mirror, Vanity Mirrors |
| 2 | 15A | Audio Alarm Module, Cigar Lighter, I/P Compartment Lamp, Luggage Compartment Lamp, Radio Module, Trunk Lid Release Relay, Low Oil Module |
| 3 | 10A | Electronic A/C Control Assembly, Rear Deffoger Relay |
| 4 | 25A | Electronic Level Control Compressor Assembly, Height Sensor Assembly |
| 5 | 7,5A | Interior Dimmer Lighting |
| 6 | 20A | Generator, Electronic Heater and Air Conditioning Control, Daytime Running Lamghts, Variable Effort Steering Controller, A/C Control Relay |
| 7 | 30A | Electronic A/C Power Module |
| 8 | 25A | Trunk Lid Pull-Down Unit, Horn Relay |
| 9 | 10A | Radio |
| 10 | 25A | Windshield Wiper/Washer Switch, Washer Fluid Level Switch |
| 11 | 7,5A | Fuel Injectors |
| 12 | 10A | Arming Sensor, Diagnostic Energy Reserve Module (DERM) |
| 13 | 10A | Engine Control Module, Knock Sensor Module, Emission Control Solenoids, Instrument Cluster, Vehicle Speed Sensor Module |
| 14 | 15A | Park/Marker/Tail, Interior Lights |
| 15 | 30A | Rear Defogger |
| 16 | 7,5A | Heated Mirrors |
| 17 | 15A | Audio Alarm Module, Defogger Relay/Timer, Diagnostic Energy Reserve Module (DERM), Electronic Compass , Height Sensor Assembly, Instrument Cluster Keyless Entry Receiver, Torque Converter Clutch/Cruise Release Switch, Twilight Sentinel Module or Daytime Running Lights Module, Headlight Switch Illumination Lamp, Low Coolant Module, Fluid Warning Center, Instrument Cluster |
| 18 | 15A | Backup Lights, Turn Signal Flasher, Cruise Control, Electronic Brake Control Module |
| 19 | 20A | Brake Light, Hazard Flasher |
| 20 | 5A | Diagnostic Energy Reserve Module (DERM), Engine Control Module |
| Circuit Breaker | Ampere rating [A] | Usage |
| A | 30A | Power Seat Switches, Power Door Lock Relay, Keyless Enetry Receiver |
| C | 30A | Master Power Window Switch, Window Lockout Switch |
Conclusion
For owners and enthusiasts of the Buick Roadmaster 1993, familiarity with the fuse box and relay systems is crucial for vehicle maintenance. Regular inspection and replacement of fuses and relays helped ensure the vehicle’s longevity and reliability, preserving its status as a luxurious and dependable mode of transportation during its production year.
