For 1990-2009 cars only
- Inspect the CIG/AUX circuit breaker to determine if the circuit breaker is open. If an open condition exists, locate and repair the overload condition and replace the circuit breaker.
- Test for B+ at the AUX power outlet (if equipped). This outlet shares the same power supply as the lighter.
- Inspect for broken (or partially broken) wire inside the insulation. This condition could cause system malfunction but prove to test good in a continuity or voltage test with the system disconnected. These circuits may be intermittent or resistive when in operation. If possible test for a voltage drop when the system is operational.
- Inspect for proper installation of aftermarket electronic equipment which may affect the integrity of other systems.
