Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Was the Headlights System Check performed? | -- | Go to Step 2 | Go to Headlight System Check |
2 |
Does the twilight sentinel enable switch operate properly? | -- | Go to Step 3 | Go to Step 7 |
3 |
Is the twilight photo value near 255 counts? | -- | Go to Step 4 | Go to Step 6 |
4 | Expose the ambient light sensor to bright sunlight or a very bright incandescent light. Is the twilight photo value near 0 counts? | -- | Go to Step 5 | Go to Step 6 |
5 |
Is the IPC replacement complete? | -- | Go to Headlight System Check | -- |
6 | Inspect CKT 279 (BLK) for an open or short to voltage. Refer to Testing for Continuity in Wiring Systems. Is CKT 279 OK? | -- | Go to Step 11 | Go to Step 13 |
7 |
Is the twilight enable switch input on? | -- | Go to Step 9 | Go to Step 8 |
8 | Inspect CKT 151 (BLK/WHT) for an open between the headlamp switch and S216. Refer to Testing for Continuity in Wiring Systems. Is CKT 151 OK? | -- | Go to Step 10 | Go to Step 13 |
9 | Repair the open in CKT 1784 (YEL/BLK). Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Headlight System Check | -- |
10 | Replace the headlamp switch. Refer to Headlamp Switch Replacement . Is the headlamp switch replacement complete? | -- | Go to Headlight System Check | -- |
11 | Inspect CKT 278 (WHT) for an open or short to ground. Refer to Testing for Continuity or Testing for Short to Ground in Wiring Systems. Is CKT 278 OK? | -- | Go to Step 12 | Go to Step 13 |
12 | Replace the ambient light sensor. Refer to Sunload and Twilight Sentinel Sensor Replacement in Instrument Panel, Gauges and Console. Is the ambient light sensor replacement complete? | -- | Go to Headlight System Check | -- |
13 | Repair the suspect wiring. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Headlight System Check | -- |
