Important: The following steps must be completed before using the symptom tables.
- Perform
Diagnostic System Check - Lighting Systems
before using the Symptom Tables in order to verify
that all of the following are true:
• | The control module(s) can communicate via the serial data link. |
- Review the system operation and circuit descriptions that apply
to the customer complaint in order to familiarize yourself with the system
functions. Refer to the following list:
Visual/Physical Inspection
• | Inspect the easily accessible or visible system components for
obvious damage or conditions which could cause the symptom. |
Intermittent
Faulty electrical connections or wiring may be the cause of intermittent
conditions. Refer to
Testing for Intermittent Conditions and Poor Connections
in Wiring Systems.
Symptom List
Refer to a symptom diagnostic procedure from the following list in order
to diagnose the symptom: