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Home >> Buick >> 2007 >> Lucerne CX >> Repair and Diagnosis >> External Pages >> Different car >> Section 3 (Wiring Systems & Electrical Power Management - Introduction) >> Repair Instructions >> Underhood Electrical Center or Junction Block Replacement >> Installation Procedure

Installation Procedure

WARNING: This page is about a different car, the 2005 Buick LaCrosse and 2005 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.
    NOTE: Refer to Fastener Notice in Cautions and Notices.
    Fig 1: Wiring Junction Block Retainer
    GM321442Courtesy of GENERAL MOTORS CORP.
  1. If accessory wiring junction block retainer installation is necessary, perform the following:
    1. Position the junction block retainer to the strut tower and insert the lower tab on the retainer to the slot on the tower.
    2. Install the junction block retainer to strut tower nut.

      Tighten:  Tighten the underhood accessory wiring junction block retainer to strut tower nut to 3 N.m (27 lb in).

    3. Position the positive battery cable lead end through the slot in the junction block retainer, then secure the cable retainers.
    2. Fig 2: View Of Forward Lamp Wiring Harness & Junction Block
    GM321458Courtesy of GENERAL MOTORS CORP.
  2. Connect the forward lamp wiring harness connector to the junction block.
    3. Fig 3: View Of I/P Wiring Harness Connector & Junction Block
    GM321469Courtesy of GENERAL MOTORS CORP.
  3. Connect the I/P wiring harness connector to the junction block.
    4. Fig 4: View Of Engine Wiring Harness Connector & Junction Block
    GM321473Courtesy of GENERAL MOTORS CORP.
  4. Connect the engine wiring harness connector to the junction block.
  5. Tighten the bolts retaining the engine, I/P and forward lamp wiring harness connectors to the junction block.

    Tighten:  Tighten the wiring harness connectors to underhood accessory wiring junction block retaining bolts to 7 N.m (62 lb in).

    6. Fig 5: View Of I/P Wiring Harness & Junction Block
    GM321477Courtesy of GENERAL MOTORS CORP.
  6. Connect the I/P wiring harness individual connectors to the junction block.
    7. Fig 6: Junction Block To Junction Block Retainer Tabs
    GM321480Courtesy of GENERAL MOTORS CORP.
  7. Position the wiring harnesses and the accessory wiring junction block to the junction block retainer, align the 4 retaining tabs and press into place to secure the junction block.
  8. Secure the coolant recovery tank hose retainer to the junction block.
    9. Fig 7: Remote Positive Battery Cable Stud & Cover
    GM289343Courtesy of GENERAL MOTORS CORP.
  9. Install the positive battery cable lead to the stud on the underhood accessory wiring junction block, then install the cable lead retaining nut.

    Tighten:  Tighten the positive battery cable lead to underhood accessory wiring junction block retaining nut to 10 N.m (89 lb in).

  10. Install the remote positive battery cable stud cover.
  11. Connect the negative battery cable. Refer to Battery Negative Cable Disconnect/Connect Procedure in Engine Electrical.
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