Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Does the vehicle have P/B booster fluid flow alarm? | -- | ||
2 |
Does the brake indicator remain on? | -- | ||
3 | Disconnect the brake pressure differential switch connector. Does the brake indicator remain on? | -- | ||
4 | Is the park brake warning switch properly adjusted? | -- | -- | |
5 | Disconnect electronic brake control module connector C1. Does the brake indicator remain lit? | -- | ||
6 | Refer to Brake System Testing for diagnosis of the hydraulic brake system. Does the brake indicator run correctly? | -- | System OK | -- |
7 | Disconnect the daytime running lamp control module slide board connector. Does the brake indicator remain on? | -- | ||
8 | Refer to Diagnostic System Check . Does the brake indicator run correctly? | -- | System OK | -- |
9 |
Does the test lamp light? | -- | ||
10 |
Does the test lamp light? | -- | ||
11 | Repair the short to ground in the TAN/WHT (33) wire between the instrument cluster and the daytime running lamp control module. Does the brake indicator turn off? | -- | System OK | -- |
12 | Replace the instrument cluster printed circuit. Does the brake indicator turn off? | -- | System OK | -- |
13 |
Does the test lamp light? | -- | ||
14 |
Does the brake indicator turn off? | -- | System OK | -- |
15 |
Does the brake indicator turn off? | -- | System OK | -- |
16 |
Does the test lamp light? | -- | ||
17 |
Does the brake indicator turn off? | -- | System OK | -- |
18 |
Does the test lamp light? | -- | ||
19 | Locate and repair short to ground in the TAN/WHT (33) wire between the daytime running lamp control module and the park brake warning switch. Does the brake indicator turn off? | -- | System OK | -- |
20 | Replace the daytime running lamp control module. Does the brake indicator turn off? | -- | System OK | -- |
21 |
Does the brake indicator turn off? | -- | ||
22 | Measure the P/B booster fluid pressure and flow. Refer to Power Steering System Test in Power Steering System. Is the P/B booster fluid flow or pressure low? | -- | ||
23 | Refer to Power Steering System Flushing in Power Steering System. Does the brake indicator turn off? | -- | System OK | -- |
24 | With the engine still running, connect an unpowered test lamp from connector C217 pin A to B+. Does the test lamp light? | -- | ||
25 |
Does the test lamp light? | -- | ||
26 | Replace the daytime running lamp control module. Does the brake indicator turn off? | -- | System OK | -- |
27 |
Does the test lamp light? | -- | ||
28 |
Does the brake indicator turn off? | -- | System OK | -- |
29 |
Does the test lamp light? | -- | ||
30 | Replace the P/B booster fluid flow alarm switch. Does the brake indicator turn off? | -- | System OK | -- |
31 |
Does the test lamp light? | -- | ||
32 |
Does the brake indicator turn off? | -- | System OK | -- |
33 | Repair the short to ground in the LT GRN (966) wire between P/B booster fluid pressure alarm switch and the P/B booster fluid flow and pressure alarm delay module. Does the brake indicator turn off? | -- | System OK | -- |
34 | Replace the instrument cluster printed circuit. Does the brake indicator turn off? | -- | System OK | -- |
35 | Replace the park brake warning switch. Does the brake indicator run correctly? | -- | System OK | -- |
36 | Properly adjust the park brake warning switch. Does the brake indicator run correctly? | -- | System OK | -- |
