Step | Action | Value(s) | Yes | No | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
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Important: Verify the park brake lever bolts and park brake indicator switch screw are tight and NOT corroded. Also, verify that there is proper battery voltage present. | ||||||||||
1 | Did you review the brake warning system operation and perform the necessary inspections? | -- | Go to Step 2 | Go to Symptoms | ||||||
2 | Verify that the brake warning indicator is inoperative. Is the brake warning indicator operating normally? | -- | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 | ||||||
3 |
Are all of the modules communicating with the scan tool? | -- | Go to Step 4 | Go to Scan Tool Does Not Communicate with Class 2 Device in Data Link Communications | ||||||
4 | Use the scan tool to turn the brake warning lamp on and off. Does the lamp turn on and off? | -- | Go to Step 5 | Go to Step 17 | ||||||
5 | Is the brake warning lamp only inoperative with the park brake engaged? | -- | Go to Step 9 | Go to Step 6 | ||||||
6 | Is the brake warning lamp only inoperative when the hydraulic brake system has low brake pressure in the front or rear brakes? | -- | Go to Step 12 | Go to Step 7 | ||||||
7 | Is the brake warning lamp only inoperative during the instrument cluster bulb test with the ignition switch in off, run or start positions? | -- | Go to Step 17 | Go to Step 8 | ||||||
8 | Is the brake warning lamp completely inoperative? | -- | Go to Step 17 | Go to Step 18 | ||||||
9 | Ground CKT 1134 (LT BLU) at the park brake indicator switch connector. Does the brake warning lamp turn ON? | -- | Go to Step 10 | Go to Step 11 | ||||||
10 | Replace the park brake indicator switch. Is the repair complete? | -- | Go to Step 18 | -- | ||||||
11 | Repair the open in CKT 1134 (LT BLU) between the park brake indicator switch and the BCM. Is the repair complete? | -- | Go to Step 18 | -- | ||||||
12 | Ground CKT 680 (PPL) at the brake pressure differential switch. Does the brake warning lamp turn ON? | -- | Go to Step 13 | Go to Step 16 | ||||||
13 | Verify ground CKT 350 (BLK) at the brake pressure differential switch. Does a ground exist? | -- | Go to Step 14 | Go to Step 15 | ||||||
14 | Replace the brake pressure differential switch. Is the repair complete? | -- | Go to Step 18 | -- | ||||||
15 | Repair the open in CKT 350 (BLK) between the brake pressure differential switch and G102. Is the repair complete? | -- | Go to Step 18 | -- | ||||||
16 | Repair the open in CKT 680 (PPL) between the brake pressure differential switch and the EBCM. Is the repair complete? | -- | Go to Step 18 | -- | ||||||
17 | Replace the instrument cluster. Refer to Instrument Cluster Lens Replacement in Instrument Panel, Gauges and Console. Is the repair complete? | -- | Go to Step 18 | -- | ||||||
18 | Operate the system in order to verify the repair. Did you correct the condition? | -- | System OK | Go to Step 3 | ||||||
