Headlamps - Low Beams On with Headlamp Switch Off DeVille
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Was the Headlight Lights System Check performed? | -- | Go to Step 2 | Go to Headlight System Check |
2 | Are the park lamps also on? | -- | Go to Step 3 | Go to Step 13 |
3 |
Does the headlamp switch operate properly? | -- | Go to Step 4 | Go to Step 10 |
4 | Disconnect the instrument cluster (IPC) connector C3. Do the headlamps and park lamps turn off? | -- | Go to Step 5 | Go to Step 6 |
5 | Replace the instrument cluster (IPC). Refer to Instrument Cluster Replacement in Instrument Panel, Gauges and Console. Is the IPC replacement complete? | -- | Go to Headlight System Check | -- |
6 | Disconnect the body control module (PZM) connector C2. Do the headlamps and park lamps turn off? | -- | Go to Step 7 | Go to Step 8 |
7 | Replace the body control module (PZM). Refer to Body Control Module Replacement in Body Control Systems. Is the body control module replacement complete? | -- | Go to Headlight System Check | -- |
8 | Inspect CKT 10 (YEL) for a short to ground. Refer to Testing for Short to Ground in Wiring Systems. Is CKT 10 OK? | -- | Go to Step 9 | Go to Step 18 |
9 | Repair the short to voltage in CKT 352 (WHT). Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Headlight System Check | -- |
10 | Disconnect the headlamp switch connector C1. Do the park lamps turn off? | -- | Go to Step 11 | Go to Step 12 |
11 | Replace the headlamp switch. Refer to Headlamp Switch Replacement . Is the headlamp switch replacement complete? | -- | Go to Headlight System Check | -- |
12 | Inspect CKT 10 (YEL) for a short to ground. Refer to Testing for Short to Ground in Wiring Systems. Is CKT 10 OK? | -- | Go to Step 5 | Go to Step 18 |
13 | Remove the headlamp relay from the underhood relay center. Do the headlamps turn off? | -- | Go to Step 14 | Go to Step 15 |
14 | Replace the headlamp relay. Is the headlamp relay replacement complete? | -- | Go to Headlight System Check | -- |
15 | Remove the DRL relay from the underhood relay center. Do the headlamps turn off? | -- | Go to Step 16 | Go to Step 17 |
16 | Replace the DRL relay. Is the DRL relay replacement complete? | -- | Go to Headlight System Check | -- |
17 | Repair the short to voltage in CKT 12 (TAN). Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Headlight System Check | -- |
18 | Repair the suspect wiring. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Headlight System Check | -- |
Headlamps - Low Beams On with Headlamp Switch Off Eldorado
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Was the Headlight Lights System Check performed? | -- | Go to Step 2 | Go to Headlight System Check |
2 | Are the park lamps also on? | -- | Go to Step 3 | Go to Step 13 |
3 |
Does the headlamp switch operate properly? | -- | Go to Step 4 | Go to Step 10 |
4 | Disconnect the instrument cluster (IPC) connector C3. Do the headlamps and park lamps turn off? | -- | Go to Step 5 | Go to Step 6 |
5 | Replace the instrument cluster (IPC). Refer to Instrument Cluster Replacement in Instrument Panel, Gauges and Console. Is the IPC replacement complete? | -- | Go to Headlight System Check | -- |
6 | Disconnect the body control module (PZM) connector C2. Do the headlamps and park lamps turn off? | -- | Go to Step 7 | Go to Step 8 |
7 | Replace the body control module (PZM). Refer to Body Control Module Replacement in Body Control Systems. Is the body control module replacement complete? | -- | Go to Headlight System Check | -- |
8 | Inspect CKT 10 (YEL) for a short to ground. Refer to Testing for Short to Ground in Wiring Systems. Is CKT 10 OK? | -- | Go to Step 9 | Go to Step 16 |
9 | Repair the short to voltage in CKT 352 (WHT). Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Headlight System Check | -- |
10 | Disconnect the headlamp switch connector C1. Do the park lamps turn off? | -- | Go to Step 11 | Go to Step 12 |
11 | Replace the headlamp switch. Refer to Headlamp Switch Replacement . Is the headlamp switch replacement complete? | -- | Go to Headlight System Check | -- |
12 | Inspect CKT 10 (YEL) for a short to ground. Refer to Testing for Short to Ground in Wiring Systems. Is CKT 10 OK? | -- | Go to Step 5 | Go to Step 16 |
13 | Remove the headlamp relay from the underhood relay center. Do the headlamps turn off? | -- | Go to Step 14 | Go to Step 15 |
14 | Replace the headlamp relay. Is the headlamp relay replacement complete? | -- | Go to Headlight System Check | -- |
15 | Repair the short to voltage in CKT 12 (TAN). Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Headlight System Check | -- |
16 | Repair the suspect wiring. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Headlight System Check | -- |
