Exterior Lighting Test 1A - Identifying Exterior Lighting System Problems
NOTE:
Perform SYMPTOM ID TEST 1A
before proceeding with this test. For connector terminal identification, refer to CONNECTOR IDENTIFICATION
. For wiring diagrams, refer to WIRING DIAGRAMS
. After each repair, perform TEST VER-1A
.
CAUTION:
Always turn ignition switch to OFF position prior to disconnecting any module connector. Ensure all connectors are clean and tight.
Identify problem(s) listed in EXTERIOR LIGHTING SYSTEM DIAGNOSTIC TEST DIRECTORY table and perform indicated test(s).
NOTE:
Headlight time delay will only operate when ignition switch is turned off while headlights are still on, and headlight switch is turned to OFF position within 30 seconds of ignition switch being turned off. Body Control Module (BCM) provides a 90-second time delay before turning headlights off.
EXTERIOR LIGHTING SYSTEM DIAGNOSTIC TEST DIRECTORY
| Problem | Perform | |
|---|---|---|
| Auto Headlights Inoperative | EXTERIOR LIGHTING TEST 2A | |
| Auto Headlights Stay On When: | ||
| Engine Is Running & Switch Is In AUTO | EXTERIOR LIGHTING TEST 3A | |
| Engine Is Running & Switch Is OFF | EXTERIOR LIGHTING TEST 4A | |
| Headlight Delay Inoperative | EXTERIOR LIGHTING TEST 5A | |
| Headlights Will Not Turn Off | EXTERIOR LIGHTING TEST 6A | |
| Foglights Inoperative | EXTERIOR LIGHTING TEST 7A | |