For 1990-2009 cars only
Troubleshooting Hints
- Test the Scan Tool operation on a known good vehicle to make certain that the tool is operating properly.
- Inspect the Horn Circuit Breaker to determine if it is open. If an open condition exists, Locate and Repair the cause of the overload and then Replace the circuit breaker.
- Inspect grounds G106, G105 or G410 to make certain that they are clean and tight.
- 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.
