Exterior Light Test 1A - Identifying Exterior Lighting System Problems
NOTE:
Perform SYMPTOM ID TEST 1A before proceeding with this test. For connector terminal identification and wiring diagrams, see BODY CONTROL COMPUTER INTRODUCTION. Perform VERIFICATION TEST VER-1A after each repair.
CAUTION:
Always turn ignition switch to OFF position prior to disconnecting or connecting any module connector.
Exterior lighting system consists of headlights (with time delay), parking lights and underhood lights. Identify problem(s) listed in EXTERIOR LIGHT 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 45 seconds of ignition switch being turned off. Body Control Module (BCM) will provide a 90-second time delay before turning headlights off.
EXTERIOR LIGHT SYSTEM DIAGNOSTIC TEST DIRECTORY
| Problem | Perform |
|---|---|
| Headlights Will Not Turn On | EXTERIOR LIGHT TEST 2A |
| Headlights Will Not Turn Off | EXTERIOR LIGHT TEST 3A |
| Parking Lights Will Not Turn On | EXTERIOR LIGHT TEST 4A |
| Parking Lights Will Not Turn Off | EXTERIOR LIGHT TEST 5A |
| Underhood Lights Will Not Turn On | EXTERIOR LIGHT TEST 6A |
| Underhood Lights Will Not Turn Off | EXTERIOR LIGHT TEST 7A |