The Buick Terraza, released in 2005, represents Buick’s entry into the minivan market, offering a blend of comfort, versatility, and practicality. This model year of the Terraza incorporates various essential electrical components, including the fuse box and relay, which are pivotal in managing and safeguarding the vehicle’s electrical systems.
The fuse box in the Buick Terraza 2005 houses a series of fuses that serve as protective devices against electrical overloads. Each fuse is designed to break or “blow” if the circuit it protects experiences a power surge, thereby preventing damage to the electrical components. These fuses are crucial for ensuring the smooth operation of systems such as the headlights, power windows, and interior electronics.
Similarly, the relay in the Buick Terraza 2005 acts as a switch that controls the flow of electricity to specific components, such as the starter motor or the fuel pump. Relays are essential for managing high-current circuits efficiently and are often located in the engine compartment or under the dashboard.
Understanding the location and function of the fuse box and relay in the Buick Terraza 2005 is essential for both maintenance and troubleshooting. Regular inspection and replacement of blown fuses, as well as testing and potentially replacing faulty relays, can prevent electrical issues and ensure the vehicle operates reliably.
Beyond the fuse box and relay, the Buick Terraza 2005 may also feature advanced electrical components aimed at enhancing driver and passenger comfort and safety. These may include features like power sliding doors, a rear-seat entertainment system, and climate control.
(2005) 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 2005 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
| № | Description |
|---|---|
| 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 |
| PLR | Fuse Puller |
| Circuit Breakers | |
| 31 | Power Seats |
| 32 | Power Window |
| Relays | |
| 26 | Blank |
| 27 | Blank |
| 28 | Park Lamps, Taillamps |
| 29 | Retained Accessory Power |
| 30 | Rear Defog |
Engine compartment
Fuse Box Location
Fuse box diagram
Assignment of the fuses and relays in the engine compartment
| № | Description |
|---|---|
| 1 | Right High-Beam |
| 2 | Fuel Pump |
| 3 | Diode |
| BLANK | Not Used |
| 4 | Left High-Beam |
| 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 | 2004-2005: Emission, All-Wheel Drive 2006-2008: Not Used |
| 23 | Auxiliary Power |
| 24 | Front Windshield Washer |
| 25 | AC/DC Inverter |
| 26 | Rear Blower |
| 27 | Front Blower |
| 28 | Front Windshield Wiper |
| PLR | Fuse Puller |
| J-Case Fuses | |
| 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 | 2004-2005: Battery Main 1 2006-2008: Spare |
| Relay name | |
| 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 2005, familiarizing oneself with these electrical components can empower effective maintenance practices. This knowledge contributes to the longevity and reliability of the vehicle, ensuring it continues to meet the demands of modern family transportation while upholding Buick’s commitment to quality and innovation in the automotive industry.
