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 cluster illumination lamps are inoperative. Do the instrument cluster illumination lamps operate normally? | -- | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
3 | Are all of the other dimmable instrument panel component lamps operating correctly? | -- | Go to Step 7 | Go to Step 4 |
4 | Move 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 5 | Go to Step 10 |
5 | Test CKT 1220 (GRY) for a 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 short to ground in CKT 1220 (GRY). Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Step 13 | -- |
7 | Test for an open or high resistance in CKT 1220 (GRY) or CKT 1050 (BLK). Refer to Circuit Testing in Wiring Systems. Was a problem found? | -- | Go to Step 8 | Go to Step 9 |
8 | Repair the open or high resistance in CKT 1220 (GRY) or CKT 1050 (BLK). Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Step 13 | -- |
9 | Replace the Instrument Cluster. Refer to Instrument Cluster Replacement in Instrument Panel, Gauges and Console. Is the repair complete? | -- | Go to Step 13 | -- |
10 | 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 11 | Go to Step 12 |
11 | 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 13 | -- |
12 | Replace the Headlamp Switch. Refer to Headlamp Switch Replacement . Is the repair complete? | -- | Go to Step 13 | -- |
13 | Operate the system in order to verify the repair. Did you correct the condition? | -- | System OK | Go to Step 3 |
