OEM Buick Terraza Fuse Box

Buick Terraza Fuse Box Parts and Q&A

• Junction Block
  25906446
  Q: How to replace the underhood fuse box on Buick Terraza?

  A:

  The first step to replace an underhood electrical center or junction block starts with opening the hood for support and negative Battery Cable disconnection. The first step starts with removing the accessory wiring junction block assembly base cover followed by disconnecting the positive Battery Cable through its nut and cable from the positive terminal. The operator should open the two base locking tabs before carefully lifting both sides of the accessory wiring junction block assembly to free it from the three main body harness connectors. This action reveals the connectors at the lower end. The technician should separate the underhood accessory wiring junction block assembly from its installation position in the vehicle. A hook-type tool should be used to properly fit the three lower harness connectors into the base before installing the new underhood accessory wiring junction block assembly. Apply the hook tool to raise each connector so the base features secure connector insertion. The installation process requires checking that each of the three connectors has secure base attachment through gentle downward force and complete tab locking both sides. Place the new underhood accessory wiring junction block assembly over the base and use locator pins to align it before securing it with downward force. Verify the lower base locking by inspecting the 2 outer locking tabs. Secure the positive Battery Cable to its stud by using the retaining nut and tighten it to 10 n.m (89 lb in). The power sliding door re-initialization procedure should be performed after you attach the underhood electrical center cover to its base and reconnect the negative Battery Cable while closing the hood.