Step | Action | Value(s) | Yes | No | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
|
Important: Verify the park brake lever bolts and park brake warning switch screw are tight and NOT corroded. Also, verify that there is proper battery voltage present. | ||||||||||
1 | Did you perform the Hydraulic Brake Diagnostic System Check? | -- | Go to Step 2 | |||||||
2 |
Are all of the modules communicating with the scan tool? | -- | Go to Step 3 | Go to Scan Tool Does Not Communicate with Class 2 Data Line in Data Link Communications | ||||||
3 | Use the scan tool to turn the brake warning lamp on and off. Does the lamp turn on and off? | -- | Go to Step 4 | Go to Step 16 | ||||||
4 | Is the brake warning lamp only inoperative with the park brake engaged? | -- | Go to Step 8 | Go to Step 5 | ||||||
5 | 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 11 | Go to Step 6 | ||||||
6 | 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 16 | Go to Step 7 | ||||||
7 | Is the brake warning lamp completely inoperative? | -- | Go to Step 16 | |||||||
8 | Ground CKT 1134 (LT BLU) at the park brake warning switch connector. Does the brake warning lamp turn ON? | -- | Go to Step 9 | Go to Step 10 | ||||||
9 | Replace the park brake warning switch. Is the repair complete? | -- | -- | |||||||
10 | Repair the open in CKT 1134 (LT BLU) between the park brake warning switch and the BCM. Is the repair complete? | -- | -- | |||||||
11 | Ground CKT 680 (PPL) at the brake pressure warning switch. Does the brake warning lamp turn ON? | -- | Go to Step 12 | Go to Step 15 | ||||||
12 | Verify ground CKT 350 (BLK) at the brake pressure warning switch. Does a ground exist? | -- | Go to Step 13 | Go to Step 14 | ||||||
13 | Replace the brake pressure warning switch. Is the repair complete? | -- | -- | |||||||
14 | Repair the open in CKT 350 (BLK) between the brake pressure warning switch and G102. Is the repair complete? | -- | -- | |||||||
15 | Repair the open in CKT 680 (PPL) between the brake pressure warning switch and the EBCM. Is the repair complete? | -- | -- | |||||||
16 | Replace the instrument cluster. Refer to Instrument Cluster Replacement in Instrument Panel, Gauges and Console. Is the repair complete? | -- | -- | |||||||
