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TEST ACTION APPLICABILITY 4 Disconnect the Brake Lamp Switch harness connector. t in Inputs/Outputs, read the Brake Lamp Switch state. Connect and disconnect a jumper wire between the Brake Lamp Switch Ground and t display PRESSED and RELEASED? All Yes → Replace the Brake Lamp Switch in accordance with the Service No → 5 Disconnect the CAB harness connector. All Yes → Repair the Brake Lamp Switch Sense circuit for a short to voltage No → Replace the Controller Antilock Brake in accordance with the 11 BRAKES (CAB) BRAKE LAMP SWITCH CIRCUIT — Continued |