LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Cadillac >> 2009 >> Escalade Base, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 249 (Power Seat System) >> Diagnostic Information and Procedures >> Lumbar Support Inoperative (Without Memory A45) >> Circuit/System Testing
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Circuit/System Testing

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2010 GMC Yukon XL, 2010 GMC Yukon, 2010 Chevrolet Tahoe, 2010 Chevrolet Suburban, and 2010 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the harness connector at the lumbar switch.
  2. Test for less than 5 ohms between the ground circuit terminal E and ground.
    • If greater than the specified value, test the ground circuit for an open/high resistance.
  3. Ignition ON, verify that a test lamp illuminates between the B+ circuit terminal G and ground.
    • If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
  4. Ignition OFF, connect the harness connector at the lumbar switch and disconnect the harness connector at the lumbar adjuster motor assembly.
  5. Ignition ON, verify that the test lamp illuminates between the appropriate control circuits listed below while pressing the lumbar switch in both directions.
    • Lumbar horizontal motor terminal C and terminal D
    • Lumbar vertical motor terminal A and terminal B
    • If the test lamp does not illuminate for both directions, test the control circuits for a short to ground or an open/high resistance. If the circuits test normal, test or replace the lumbar switch.
  6. If all circuits test normal, test or replace the lumbar adjuster assembly.
scientia non olet · About LEMON Manuals