Circuit/System Testing
- Ignition/vehicle OFF, all vehicle systems OFF, disconnect the K67 Trailer Brake Control Module.
- Verify a test lamp illuminates between ground circuit terminal 9 and B+.
- If the test lamp does not illuminate.
- Repair the open/high resistance on the ground circuit or ground connection.
- Go to next step: If the test lamp illuminates.
- Test circuit 2224 for a short to ground.
- If a short to ground is found, repair the fault on the circuit.
- Go to next step: If a short to ground is not found.
- Test circuit 2224 for an open/high resistance.
- If an open/high resistance is found, repair the fault on the circuit.
- Go to next step: If an open/high resistance is not found.
- Test circuit 2224 for a short to voltage.
- If a short to voltage is found, repair the fault on the circuit.
- Go to next step: If a short to voltage is not found.
- Replace the K67 Trailer Brake Control Module.
- Ignition ON/vehicle in service mode, verify the DTC does not reset.
- If the DTC resets, replace the K160 Brake System Control Module
- Go to next step: If the DTC does not reset
- All OK.