The Buick Terraza, produced from 2006 to 2008, represented Buick’s foray into the minivan market, offering a blend of comfort, utility, and family-friendly features. Understanding the electrical components, including the fuse box and relay, is crucial for maintaining and troubleshooting these models.
The fuse box in the Buick Terraza (2006–2008) houses various fuses that protect electrical circuits from overloads. These fuses are essential for safeguarding critical systems such as the headlights, power windows, and interior electronics. Regular inspection and replacement of blown fuses are necessary to ensure uninterrupted operation of these components.
Relays in the Buick Terraza (2006–2008) act as switches that control the flow of electricity to specific components like the starter motor or fuel pump. Proper functioning of relays is vital for efficient operation of high-current circuits. These relays are typically located in the engine compartment or under the dashboard for accessibility and ease of maintenance.
In addition to the fuse box and relays, the Buick Terraza (2006–2008) incorporates advanced electrical features aimed at enhancing convenience and safety. These may include power sliding doors, a rear-seat entertainment system, and automatic climate control. Understanding how these components interact with the fuse box and relays can aid in diagnosing and resolving electrical issues.
(2006–2008) Buick Terraza 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 Terraza 2006–2008 fuse assignment
Passenger compartment fuse box
Fuse Box Location
It is located on the passenger’s side of the instrument panel, behind the cover.
Fuse box diagram
| Fuses | Usage |
| 1 | Trunk, Door Locks |
| 2 | Electronic Level Control |
| 3 | Rear Wiper |
| 4 | Radio, DVD Player |
| 5 | Interior Lamps |
| 6 | OnStar® |
| 7 | Keyless Entry Module |
| 8 | Cluster, Heating, Ventilation, Air Conditioning |
| 9 | Cruise Switch |
| 10 | Steering Wheel Illumination |
| 11 | Power Mirror |
| 12 | Stoplamp, Turn Lamps |
| 13 | Heated Seats |
| 14 | Blank |
| 15 | Electronic Level Control |
| 16 | Heated Mirror |
| 17 | Center High-Mounted Stoplamp, Back-up Lamps |
| 18 | Blank |
| 19 | Canister Vent Solenoid |
| 20 | Park Lamps |
| 21 | Power Sliding Door |
| 22 | Blank |
| 23 | Blank |
| 24 | Left Power Sliding Door |
| 25 | Right Power Sliding Door |
| Relays | Usage |
| 26 | Blank |
| 27 | Blank |
| 28 | Park Lamps, Taillamps |
| 29 | Retained Accessory Power |
| 30 | Rear Defog |
| PLR | Fuse Puller |
| Circuit Breaker | Usage |
| 31 | Power Seats |
| 32 | Power Window |
Engine compartment
Fuse Box Location
Fuse box diagram
Assignment of the fuses and relays in the engine compartment
| Fuses | Usage |
| 1 | Right High-Beam |
| 2 | Fuel Pump |
| 3 | Diode |
| BLANK | Not Used |
| BLANK | Not Used |
| 4 | Left High-Beam |
| BLANK | Not Used |
| BLANK | Not Used |
| BLANK | Not Used |
| 5 | Not Used |
| 6 | Air Conditioning Clutch |
| 7 | Horn |
| 8 | Left Low-Beam |
| 9 | Powertrain Control Module, Electronic Throttle Control |
| 10 | Not Used |
| 11 | Transmission Solenoid |
| 12 | Right Low-Beam |
| 13 | Anti-lock Brake System |
| 14 | Powertrain Control Module Ignition |
| 15 | Electronic Ignition |
| 16 | Fuel Injector |
| 17 | Climate Control, RPA, Cruise Control |
| 18 | Electronic Throttle Control |
| 19 | Engine Sensor, Evaporator |
| 20 | Airbag |
| 21 | Not Used |
| 22 | Not Used |
| 23 | Auxiliary Power |
| 24 | Front Windshield Washer |
| 25 | AC/DC Inverter |
| 26 | Rear Blower |
| 27 | Front Blower |
| 28 | Front Windshield Wiper |
| J-Case Fuses | Usage |
| PLR | Fuse Puller |
| 29 | Fan 1 |
| 30 | Starter Solenoid |
| 31 | Anti-lock Brake System Motor |
| 32 | Blank |
| 33 | Fan 2 |
| 34 | Front Blower High |
| 35 | Battery Main 3 |
| 36 | Rear Defogger |
| 37 | Battery Main 2 |
| 38 | Spare |
| Relays | Usage |
| RUN RLY | Starter |
| LO BEAM | Low-Beam |
| FUEL PUMP | Fuel Pump |
| HORN | Horn |
| AC/CLTCH | Air Conditioning Clutch |
| HI BEAM | High-Beam |
| PWR/TRN | Powertrain |
| WPR2 | Wiper 2 |
| WPR1 | Wiper 1 |
| FAN 1 | Fan 1 |
| CRNK | Crank |
| IGN MAIN | Ignition Main |
| FAN2 | Fan 2 |
| FAN3 | Fan 3 |
| BLANK | Not Used |
Conclusion
For owners and enthusiasts of the Buick Terraza (2006–2008), familiarity with the location and function of the fuse box and relay is essential for proactive maintenance. This knowledge ensures the vehicle operates reliably and safely, upholding Buick’s reputation for quality craftsmanship and innovation in the automotive industry.