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Home >> GMC >> 2006 >> Sierra 1500 HD, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1578 (Power Seat System) >> Diagnostic Information and Procedures >> Power Seat Inoperative (With Memory A45) >> Component Testing

Component Testing

WARNING: This page is about a different car, the 2010 GMC Sierra, 2010 GMC Cab & Chassis Sierra, 2010 Chevrolet Silverado, and 2010 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

Seat Adjuster Switch

  1. Ignition OFF, disconnect the harness connector at the seat adjuster switch.
  2. Test for infinite resistance between each seat direction signal terminal listed below and the B+ terminal E with the switch in the open position.
    • Front vertical upward switch terminal A
    • Front vertical downward switch terminal K
    • Rear vertical upward switch terminal F
    • Rear vertical downward switch terminal J
    • Horizontal forward switch terminal D
    • Horizontal rearward switch terminal C
    • Recline forward switch terminal H
    • Recline rearward switch terminal G
    • If not the specified value, replace the seat adjuster switch.
  3. Test for less than 1 Ω between each seat direction signal terminal listed below and the B+ terminal E with the switch in the closed position.
    • Front vertical upward switch terminal A
    • Front vertical downward switch terminal K
    • Rear vertical upward switch terminal F
    • Rear vertical downward switch terminal J
    • Horizontal forward switch terminal D
    • Horizontal rearward switch terminal C
    • Recline forward switch terminal H
    • Recline rearward switch terminal G
    • If greater than the specified range, replace the adjuster switch switch.