Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Did you perform the Lighting Systems Diagnostic System Check? | -- | Go to Step 2 | |
2 | Does the twilight sentinel delay feature operate properly? | -- | Go to Step 3 | Go to Step 15 |
3 |
Does the twilight sentinel enable switch operate properly? | -- | Go to Step 4 | Go to Step 8 |
4 |
Does the twilight photo value change? | -- | Go to Step 5 | Go to Step 7 |
5 | Expose the ambient light sensor to bright sunlight or a very bright incandescent light. Does the twilight photo value change? | -- | Go to Step 6 | Go to Step 7 |
6 |
Is the IPC replacement complete? | -- | Go to Step 25 | -- |
7 | 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 12 | Go to Step 14 |
8 |
Is the twilight enable switch input on? | -- | Go to Step 9 | Go to Step 10 |
9 | 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 11 | Go to Step 14 |
10 | Repair the open in CKT 1784 (YEL/BLK). Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Step 25 | -- |
11 | Replace the headlamp switch. Refer to Headlamp Switch Replacement in Lighting Systems. Is the headlamp switch replacement complete? | -- | Go to Step 25 | -- |
12 | 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 13 | Go to Step 14 |
13 | 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 Step 25 | -- |
14 | Repair the suspect wiring. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Step 25 | -- |
15 |
Does the twilight delay value change? | -- | Go to Step 16 | Go to Step 18 |
16 |
Does the twilight delay value change? | -- | Go to Step 17 | Go to Step 18 |
17 |
Is the repair complete? | -- | Go to Step 25 | -- |
18 |
Is the voltage within the specified value? | 4.4 - 4.8V | Go to Step 19 | Go to Step 21 |
19 | Slide the twilight delay switch to the extreme negative position. Is the voltage within the specified value? | 0.2 - 0.6V | Go to Step 20 | Go to Step 21 |
20 | Replace the instrument panel cluster (IPC). Refer to Instrument Cluster Replacement in Instrument Panel, Gauges and Console. Is the repair complete? | -- | Go to Step 25 | -- |
21 | Inspect CKT 1783 (PPL) for an open or short to ground. Refer to Testing for Continuity or Testing for Short to Ground in Wiring System. Is the CKT 1783 OK? | -- | Go to Step 22 | Go to Step 24 |
22 | Inspect CKT 470 (BLK) for an open. Refer to Testing for Continuity in Wiring systems. Is CKT 470 OK? | -- | Go to Step 23 | Go to Step 24 |
23 | Replace the headlamp switch. Refer to Headlamp Switch Replacement in Lighting Systems. Is the repair complete? | -- | Go to Step 25 | -- |
24 | Repair the suspect wiring. Refer to Wiring Repairs in Wiring Systems | -- | Go to Step 25 | -- |
25 | Operate the system in order to verify the repair. Did you correct the condition? | -- | System OK. | Go to Step 2 |
