For 1990-2009 cars only
- Inspect circuit breakers number 6, 14, 15, and 16. If the circuit breaker is open, locate and repair the cause of the circuit overload and replace the circuit breaker.
- Inspect G105 to make certain that it is clean and tight.
- Inspect the inoperative lamp for an open or shorted filament. Replace the lamp if it is defective.
- Inspect the DRL OFF Relay, the DRL ON Relay, the Lighting Relay, Lighting High/Low Relay and the DRL Indicator Lamp Relay to make certain that they are all tightly connected.
- Inspect for a broken (or partially broken) conductor inside the insulation which could cause a malfunction but prove GOOD in a system test for continuity or voltage. These circuits may be intermittent or resistive, when loaded, and if possible, should be monitored for a voltage drop when the system is placed under load.
- Inspect for proper installation of aftermarket electronic equipment which might affect the operation of other equipment.
