Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
DEFINITION: The red brake indicator lamp remains lit with the ignition ON beyond the 3-5 second Lamp Check. | ||||
1 | Did you review the brake warning system operation and perform the necessary inspections? | -- | Go to Step 2 | Go to Symptoms |
2 | Verify the red brake indicator is lit. Does the brake warning system operate normally? | -- | Go to Testing for Intermittent Conditions and Poor Connections | Go to Step 3 |
3 | Does the vehicle have RPO UJ1 (P/B booster fluid flow alarm)? | -- | Go to Step 4 | Go to Step 7 |
4 |
Does the brake indicator turn off? | -- | Go to Step 5 | Go to Step 7 |
5 | Measure the P/B booster fluid pressure and flow. Refer to Power Steering System Test in Steering. Is the P/B booster fluid flow or pressure low? | -- | Go to Step 6 | Go to Step 16 |
6 | Refer to Power Steering System Test in Steering for information on diagnosis and repair. Does the brake indicator turn off? | -- | Go to Step 33 | Go to Step 3 |
7 |
Does the brake indicator remain on? | -- | Go to Step 8 | Go to Step 28 |
8 | Disconnect the brake pressure differential switch. Does the brake indicator remain on? | -- | Go to Step 9 | Go to Step 19 |
9 | Disconnect electronic brake control module connector C1. Does the brake indicator remain on? | -- | Go to Step 10 | Go to Step 20 |
10 | Disconnect the daytime running lamps control module slide board connector. Does the brake indicator remain on? | -- | Go to Step 11 | Go to Step 12 |
11 |
Does the test lamp light? | -- | Go to Step 21 | Go to Step 29 |
12 | Connect a J 35616-200 unpowered test lamp between daytime running lamps control module connector cavity H for CKT 150 (BLK) and B+. Refer to Circuit Testing in Wiring Systems. Does the test lamp light? | -- | Go to Step 13 | Go to Step 22 |
13 | Connect a J 35616-200 unpowered test lamp between daytime running lamps control module connector cavity F for CKT 33 (TAN/WHT) and B+. Refer to Circuit Testing in Wiring Systems. Does the test lamp light? | -- | Go to Step 23 | Go to Step 14 |
14 | Connect a J 35616-200 unpowered test lamp between daytime running lamps control module connector cavity B for CKT 1134 (LT BLU) and B+. Refer to Circuit Testing in Wiring Systems. Does the test lamp light? | -- | Go to Step 24 | Go to Step 15 |
15 |
Does the test lamp light? | -- | Go to Step 25 | Go to Step 30 |
16 | With the engine still running, connect a J 35616-200 unpowered test lamp between connector C217 cavity A for CKT 33 (TAN/WHT) and B+. Refer to Circuit Testing in Wiring Systems. Does the test lamp light? | -- | Go to Step 30 | Go to Step 17 |
17 |
Does the test lamp light? | -- | Go to Step 18 | Go to Step 26 |
18 |
Does the test lamp light? | -- | Go to Step 27 | Go to Step 32 |
19 | Refer to Brake System Diagnosis . Does the brake indicator operate correctly? | -- | Go to Step 33 | Go to Step 3 |
20 | Refer to Diagnostic Starting Point in ABS. Does the brake indicator operate correctly? | -- | Go to Step 33 | Go to Step 3 |
21 | Repair the short to ground in CKT 33 (TAN/WHT) between the instrument cluster and the daytime running lamps control module or between the daytime running lamps control module and C217 (With UJ1). Refer to Wiring Repairs in Wiring Systems. Does the brake indicator turn off? | -- | Go to Step 33 | Go to Step 3 |
22 | Repair the open in CKT 150 (BLK) between the daytime running lamps control module and ground G201. Refer to Wiring Repairs in Wiring Systems. Does the brake indicator turn off? | -- | Go to Step 33 | Go to Step 3 |
23 | Repair the short to ground in CKT 33 (TAN/WHT) or CKT 680 (PPL) between the daytime running lamps control module and the brake pressure differential switch or electronic brake control module. Refer to Wiring Repairs in Wiring Systems. Does the brake indicator turn off? | -- | Go to Step 33 | Go to Step 3 |
24 | Repair the short to ground in CKT 1134 (LT BLU) between the daytime running lamps control module and the ignition switch. Refer to Wiring Repairs in Wiring Systems. Does the brake indicator turn off? | -- | Go to Step 33 | Go to Step 3 |
25 | Repair the short to ground in CKT 1134 (LT BLU) between the daytime running lamps control module and the park brake warning switch. Refer to Wiring Repairs in Wiring Systems. Does the brake indicator turn off? | -- | Go to Step 33 | Go to Step 3 |
26 | Repair the short to ground in CKT 849 (PNK) between the P/B booster fluid flow and pressure alarm delay module and the P/B booster fluid pressure alarm switch. Refer to Wiring Repairs in Wiring Systems. Was a short to ground located and repaired? | -- | Go to Step 33 | Go to Step 31 |
27 | Repair the short to ground in CKT 1471 (BLK/YEL). Refer to Wiring Repairs in Wiring Systems. Was a short to ground located and repaired? | -- | Go to Step 33 | Go to Step 32 |
28 | Replace the park brake warning switch. Refer to Parking Brake Indicator Switch Replacement in Park Brake. Does the brake indicator run correctly? | -- | Go to Step 33 | Go to Step 3 |
29 | Replace the instrument cluster printed circuit. Refer to Instrument Cluster Replacement in IP, Gauges and Console. Does the brake indicator turn off? | -- | Go to Step 33 | Go to Step 3 |
30 | Replace the daytime running lamps control module. Refer to Daytime Running Lights (DRL) Control Module Replacement in Lighting Systems. Does the brake indicator turn off? | -- | Go to Step 33 | Go to Step 3 |
31 |
Does the brake indicator turn off? | -- | Go to Step 33 | Go to Step 3 |
32 | Replace the P/B booster fluid flow alarm. Does the brake indicator turn off? | -- | Go to Step 33 | Go to Step 3 |
33 | Operate the system in order to verify the repair. Did you correct the condition? | -- | System OK | Go to Step 3 |
