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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 >> Removal Procedure

Removal 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.
    Fig 1: Remote Positive Battery Cable Stud & Cover
    GM289343Courtesy of GENERAL MOTORS CORP.
  1. Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnect/Connect Procedure in Engine Electrical.
  2. Release and reposition the remote positive battery cable stud cover.
  3. Remove the nut retaining the positive battery cable lead to the underhood accessory wiring junction block, then reposition the cable lead away from the junction block.
    4. Fig 2: Junction Block To Junction Block Retainer Tabs
    GM321480Courtesy of GENERAL MOTORS CORP.
  4. Release the coolant recovery tank hose retainer from the junction block.
  5. Release the 4 tabs retaining the junction block to the junction block retainer and reposition the junction block.
    6. Fig 3: View Of I/P Wiring Harness & Junction Block
    GM321477Courtesy of GENERAL MOTORS CORP.
  6. Disconnect the instrument panel (I/P) wiring harness individual connectors from the junction block.
    7. Fig 4: View Of Engine Wiring Harness Connector & Junction Block
    GM321473Courtesy of GENERAL MOTORS CORP.
  7. Loosen the bolts retaining the engine, I/P and forward lamp wiring harness connectors to the junction block.
  8. Disconnect the engine wiring harness connector from the junction block.
    9. Fig 5: View Of I/P Wiring Harness Connector & Junction Block
    GM321469Courtesy of GENERAL MOTORS CORP.
  9. Disconnect the I/P wiring harness connector from the junction block.
    10. Fig 6: View Of Forward Lamp Wiring Harness & Junction Block
    GM321458Courtesy of GENERAL MOTORS CORP.
  10. Disconnect the forward lamp wiring harness connector from the junction block.
    11. Fig 7: Wiring Junction Block Retainer
    GM321442Courtesy of GENERAL MOTORS CORP.
  11. If accessory wiring junction block retainer removal is necessary, perform the following:
    1. Release the positive battery cable lead retainers from the junction block retainer, then reposition the cable lead away from the retainer.
    2. Remove the nut retaining the junction block retainer to the strut tower.
    3. Lift the junction block retainer to release the lower tab and remove the retainer from the vehicle.
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