For 1990-2009 cars

Step | Action | Value(s) | Yes | No
--- | --- | --- | --- | ---
1 | Were you sent here from the Exterior Lights System Check? | -- | Go to Step 2 | Go to Exterior Lights System Check
2 |

1. Apply pressure to the brake pedal, to activate the stoplamp switch.
2. Using a test lamp, backprobe the stoplamp switch cavity 1 to ground.

Does the test lamp illuminate?

--

Go to Step 3

Go to Step 6

3 |

1. Connect a fused jumper wire on the stoplamp switch connector between cavity 2 and cavity 1.
2. Using a test lamp, backprobe the junction block 1, C6 cavity 8 to ground.

Does the test lamp illuminate?

--

Go to Step 4

Go to Step 5

4 | Using a test lamp, backprobe the junction block 1 C5 cavity 7 to ground. Does the test lamp illuminate? | -- | Go to Step 9 | Go to Step 10
5 | Repair the open in the GRN/WHT wire between the stoplamp switch cavity 1 and the junction block 1, C6 cavity 6. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Exterior Lights System Check | --
6 | Using a test lamp, backprobe the stoplamp switch cavity 2 to ground. Does the test lamp illuminate? | -- | Go to Step 7 | Go to Step 8
7 | Replace the stoplamp switch. Refer to Stop Lamp Switch Replacement in Hydraulic Brakes. Is the replacement complete? | -- | Go to Exterior Lights System Check | --
8 | Repair the open in the RED/WHT wire between the stoplamp switch and the junction block 2, C3 cavity 7. Refer to Wiring Repairs in Wiring Systems. Is the replacement complete? | -- | Go to Exterior Lights System Check | --
9 | Repair the open in the GRN/WHT wire between the junction block 1, C5 cavity 7 and SP450. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Exterior Lights System Check | --
10 | Replace the junction block 1. Is the replacement complete? | -- | Go to Exterior Lights System Check | --