Test Description

The numbers below refer to the step numbers in the diagnostic procedures.

1. 1
   
   The System Check must be performed before proceeding with this diagnostic test. Failure to perform the System Check will result in misdiagnosis.
2. 3
   
   This step tests the AF ECM fuses for opens and also tests the voltage supply to the fuses.
3. 5
   
   This step tests the battery positive and switched ignition voltage circuits to the AF ECM.
4. 6
   
   This step tests the AF ECM ground circuits.
5. 7
   
   This step inspects for proper operation of the FIL. If the FIL illuminates then the ignition relay is ON.
6. 9
   
   This step inspects the ignition relays ability to turn OFF.
7. 12
   
   This step tests the Ignition Relay coils ground circuit. If the test lamp illuminates then the Ignition relay must be faulty.
8. 13
   
   This step indicates the components or circuits that may have caused a fuse to blow. Some components may require they be turned ON in order to blow the fuse. An example would be depressing the fuel gauge select switch in order to test the select switch circuit for a short.