Exterior Lights Test 1A - Identifying Exterior Lighting System Problems
NOTE:
Perform SYMPTOM ID TEST 1A
before proceeding. For connector terminal ID, see CONNECTOR IDENTIFICATION
and WIRING DIAGRAM. Perform TEST VER-1A
after each repair.
CAUTION:
Always turn ignition switch to OFF position prior to disconnecting any module connector. Ensure all connectors are clean and tight.
Identify problems(s) listed in EXTERIOR LIGHTING SYSTEM DIAGNOSTIC TEST DIRECTORY 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 LIGHTS TEST 2A | |
| Auto Headlights Stay On When: | ||
| Engine Is Running & Switch Is In AUTO | EXTERIOR LIGHTS TEST 3A | |
| Engine Is Running & Switch Is OFF | EXTERIOR LIGHTS TEST 4A | |
| Headlight Delay Inoperative | EXTERIOR LIGHTS TEST 5A | |
| Headlights Will Not Turn Off | EXTERIOR LIGHTS TEST 6A | |
| Foglights Inoperative | EXTERIOR LIGHTS TEST 7A | |