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

The location of the fuses in the passenger compartment: Buick Terraza (2006–2008)

It is located on the passenger’s side of the instrument panel, behind the cover.

Fuse box diagram

buick terraza fuse box instrument panel 1
buick terraza fuse box instrument panel 1
FusesUsage
1Trunk, Door Locks
2Electronic Level Control
3Rear Wiper
4Radio, DVD Player
5Interior Lamps
6OnStar®
7Keyless Entry Module
8Cluster, Heating, Ventilation, Air Conditioning
9Cruise Switch
10Steering Wheel Illumination
11Power Mirror
12Stoplamp, Turn Lamps
13Heated Seats
14Blank
15Electronic Level Control
16Heated Mirror
17Center High-Mounted Stoplamp, Back-up Lamps
18Blank
19Canister Vent Solenoid
20Park Lamps
21Power Sliding Door
22Blank
23Blank
24Left Power Sliding Door
25Right Power Sliding Door
RelaysUsage
26Blank
27Blank
28Park Lamps, Taillamps
29Retained Accessory Power
30Rear Defog
PLR Fuse Puller
Circuit BreakerUsage
31Power Seats
32Power Window

Engine compartment

Fuse Box Location

The location of the fuses in the engine compartment: Buick Terraza (2006–2008)

Fuse box diagram

buick terraza fuse box engine compartment 1
buick terraza fuse box engine compartment 1

Assignment of the fuses and relays in the engine compartment

FusesUsage
1Right High-Beam
2Fuel Pump
3Diode
BLANKNot Used
BLANKNot Used
4Left High-Beam
BLANKNot Used
BLANKNot Used
BLANKNot Used
5Not Used
6Air Conditioning Clutch
7Horn
8Left Low-Beam
9Powertrain Control Module, Electronic Throttle Control
10Not Used
11Transmission Solenoid
12Right Low-Beam
13Anti-lock Brake System
14Powertrain Control Module Ignition
15Electronic Ignition
16Fuel Injector
17Climate Control, RPA, Cruise Control
18Electronic Throttle Control
19Engine Sensor, Evaporator
20Airbag
21Not Used
22Not Used
23Auxiliary Power
24Front Windshield Washer
25AC/DC Inverter
26Rear Blower
27Front Blower
28Front Windshield Wiper
J-Case  FusesUsage
PLR Fuse Puller
29Fan 1
30Starter Solenoid
31Anti-lock Brake System Motor
32Blank
33Fan 2
34Front Blower High
35Battery Main 3
36Rear Defogger
37Battery Main 2
38Spare
RelaysUsage
RUN RLYStarter
LO BEAMLow-Beam
FUEL PUMPFuel Pump
HORNHorn
AC/CLTCHAir Conditioning Clutch
HI BEAMHigh-Beam
PWR/TRNPowertrain
WPR2Wiper 2
WPR1Wiper 1
FAN 1Fan 1
CRNKCrank
IGN MAINIgnition Main
FAN2Fan 2
FAN3Fan 3
BLANKNot 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.

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