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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 735 (Wiring Systems (General Information)) >> Repair Instructions >> Underhood Electrical Center or Junction Block Replacement >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2002 Chevrolet Malibu. However, it is still accessible from the selected car via links, so may be relevant.
  1. Disconnect the negative battery cable. Refer to BATTERY NEGATIVE CABLE DISCONNECT/CONNECT PRO in Engine Electrical.
  2. Remove the air cleaner assembly.
  3. Remove the nut retaining the positive battery cable lead to the underhood electrical center, then reposition the cable lead away from the electrical center.
  4. Remove the electrical center cover.
  5. Remove all of the fuses and the relays.
    Fig 1: Removing Fuses & Relays
    G01779469Courtesy of GENERAL MOTORS CORP.
  6. Reach under the front of the electrical center and press up on the relief in order to release the retainer tab.
  7. While pressing up, slide the electrical center forward.
    Fig 2: Releasing Electrical Center Retainer Tab
    G01779470Courtesy of GENERAL MOTORS CORP.
  8. Disconnect the electrical cable retainers at the rear of the electrical center.
  9. Release the box retainer next to the electrical cables.
    Fig 3: Disconnecting Electrical Cable Retainers
    G01779471Courtesy of GENERAL MOTORS CORP.
  10. Turn the electrical center upside down and open the lower cover.
    Fig 4: Opening Electrical Center Lower Cover
    G01779472Courtesy of GENERAL MOTORS CORP.
  11. Disconnect the instrument panel (IP) wiring harness individual connectors from the junction block.
    Fig 5: Disconnecting IP Wiring Harness Individual Connectors
    G01779473Courtesy of GENERAL MOTORS CORP.
  12. Loosen the bolts retaining the engine, IP, and forward lamp wiring harness connectors to the junction block.
  13. Disconnect the engine wiring harness connector from the junction block.
    Fig 6: Disconcerting Engine Wiring Harness Connector
    G01779474Courtesy of GENERAL MOTORS CORP.
  14. Disconnect the IP wiring harness connector from the junction block.
    Fig 7: Disconnecting IP Wiring Harness Connector
    G01779475Courtesy of GENERAL MOTORS CORP.
  15. Disconnect the forward lamp wiring harness connector from the junction block.
  16. Remove the electrical center box.
    Fig 8: Removing Electrical Center Box
    G01779476Courtesy of GENERAL MOTORS CORP.
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