Diagnosis & Testing: Notes

WARNING: This page is about a different car, the 1989 Cadillac Fleetwood and 1989 Cadillac DeVille. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Many intermittent problems are due to poor electrical connections. Diagnosis of intermittent problems should begin with visual and physical check of all connectors and wiring involved in the circuit before replacing any component of that particular system.

For system or component tests see the DFI SYS/COMPONENT TESTS article in this section. For basic trouble shooting by symptom procedures, refer to the DFI TESTS W/O CODES article in this section.