LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Cadillac >> 2007 >> Escalade EXT >> Repair and Diagnosis >> External Pages >> Different car >> Section 1344 (Lighting Systems) >> Diagnostic Information and Procedures >> Stop Lamps Malfunction >> Circuit/System Testing >> Brake Switch Circuit Test
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Brake Switch Circuit Test

WARNING: This page is about a different car, the 2009 GMC Sierra, 2009 GMC Cab & Chassis Sierra, 2009 Chevrolet Silverado, and 2009 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the harness connector at the stop lamp switch.
  2. Ignition ON, test for B+ between the ignition supply circuit terminal B and ground.
    • If less than the specified range, test the ignition supply circuit for a short to ground or an open/high resistance.
  3. Verify the scan tool TCM Brake Switch parameter is Released.
    • If not the specified value, test the signal circuit terminal A for a short to voltage.
  4. Install a 3A fused jumper wire between the signal circuit terminal B and the ignition supply circuit terminal A. Verify the scan tool Brake Switch parameter is Applied.
    • If not the specified value, test the signal circuit for an open/high resistance.
  5. If all circuits test normal, test or replace the stop lamp switch.
scientia non olet · About LEMON Manuals