"C", "G" & "K" Series (Except Sierra & Silverado)
- Disconnect BTSI solenoid harness connector. Measure voltage between battery positive terminal and ground circuit (Black wire) at BTSI solenoid harness connector. If battery voltage is present, go to step 3. If battery voltage is not present, go to next step.
- Repair open in ground circuit (Black wire) between BTSI solenoid and chassis ground.
- Place gear selector in Park. Turn ignition on. Measure voltage between ground and ignition feed circuit (Dark Green/White wire) at BTSI solenoid harness connector. If battery voltage is present, go to next step. If battery voltage is not present, go to step 5.
- Adjust or replace BTSI solenoid.
- Disconnect brakelight switch harness connector. Check for continuity in ignition feed circuit (Dark Green/White wire) between brakelight switch circuit and BTSI solenoid. If continuity is present, go to step 7. If continuity is not present, go to next step.
- Repair open in ignition feed circuit (Dark Green/White wire) between brakelight switch and BTSI solenoid.
- Measure voltage between ground and ignition feed circuit (Light Green wire) at brakelight switch harness connector. If battery voltage is present, go to next step. If battery voltage is not present, go to step 9.
- Replace brakelight switch.
- Disconnect PNP switch harness connector. Check for continuity in ignition feed circuit (Light Green wire) between PNP switch and brakelight switch. If continuity is present, go to step 11. If continuity is not present, go to next step.
- Repair open in ignition feed circuit (Light Green wire) between PNP switch and brakelight switch.
- Measure voltage between ground and ignition feed circuit (Pink wire) at PNP switch harness connector. If battery voltage is present, go to step 13. If battery voltage is not present, go to next step.
- Repair open in ignition feed circuit (Pink wire) between PNP switch and TURN/BU (20-amp) fuse located in instrument panel fuse block.
- Adjust or replace PNP switch.