Step | Action | Value(s) | Yes | No | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1 | Did you perform the Lighting Systems Diagnostic System Check? | -- | Go to Step 2 | |||||||||||||
2 | Verify that the instrument panel lamps are inoperative. Do the IP lamps operate normally? | -- | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 | ||||||||||||
3 | Turn the Headlamp Switch to PARK or HEAD Do the Park Lamps operate normally? | -- | Go to Step 4 | |||||||||||||
4 | Listed are all of the instrument panel and door panel lamps that are not dimmable.
Are any or all of the above lamps inoperative? | -- | Go to Step 5 | Go to Step 8 | ||||||||||||
5 | Test CKT 2409 (BRN) for an open, high resistance and short to ground. Refer to Circuit Testing in Wiring Systems. Was a problem found? | -- | Go to Step 6 | Go to Step 7 | ||||||||||||
6 | Repair the open, high resistance or short to ground in CKT 2409 (BRN). Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Step 17 | -- | ||||||||||||
7 | Replace the inoperative component or lamp. Is the repair complete? | -- | Go to Step 17 | -- | ||||||||||||
8 | With the Park Lamps ON, turn the rheostat from low to high and use a test lamp to ground to check for voltage at the ILLUM fuse 12 in the IP Fuse Block. Refer to Circuit Testing in Wiring Systems. Does the test lamp illuminate from dim to bright at one or more of the fuse test points? | -- | Go to Step 9 | Go to Step 14 | ||||||||||||
9 | Test CKT 1220 (GRY) for a short to ground. Refer to Circuit Testing in Wiring Systems. Was a problem found? | -- | Go to Step 10 | Go to Step 11 | ||||||||||||
10 | Repair the short to ground in CKT 1220 (GRY). Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Step 17 | -- | ||||||||||||
11 | Test for an open or high resistance in CKT 1220 (GRY) and the ground circuit to the inoperative component or lamp. Refer to Circuit Testing in Wiring Systems. Was a problem found? | -- | Go to Step 12 | Go to Step 13 | ||||||||||||
12 | Repair the open or high resistance in CKT 1220 (GRY) or the ground circuit. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Step 17 | -- | ||||||||||||
13 | Replace the inoperative component or lamp. Is the repair complete? | -- | Go to Step 17 | -- | ||||||||||||
14 | Move the rheostat from low to high and use a test lamp to ground to check for voltage at terminal K of the Headlamp Switch. Refer to Circuit Testing in Wiring Systems. Does the test lamp illuminate from dim to bright? | -- | Go to Step 15 | Go to Step 16 | ||||||||||||
15 | Repair the open or high resistance in CKT 44 (DK GRN). Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Step 17 | -- | ||||||||||||
16 | Replace the Headlamp Switch. Refer to Headlamp Switch Replacement . Is the repair complete? | -- | Go to Step 17 | -- | ||||||||||||
17 | Operate the system in order to verify the repair. Did you correct the condition? | -- | System OK | Go to Step 3 |
