For 1990-2009 cars

Step | Action | Value(s) | Yes | No
--- | --- | --- | --- | ---
1 | Did you perform the Exterior Lights System Check? | -- | Go to Step 2 | Go to Exterior Lights System Check
2 |

1. Disconnect the stoplamp/BTSI connector C2.
2. Measure the voltage between the stoplamp/BTSI switch connector C2 cavity A (ORN) and ground.

Is battery voltage measured?

B+

Go to Step 3

Go to Step 5

3 | Connect a fused jumper between the stoplamp/brake switch connector cavity A (ORN) and cavity B (WHT) Do the stop lamps light? | -- | Go to Step 4 | Go to Step 6
4 | Replace the stoplamp/BTSI switch. Refer to Stop Lamp Switch Replacement in Hydraulic Brakes. Is the repair complete? | -- | Go to Exterior Lights System Check | --
5 | Repair the open or the short to ground in CKT 140 (ORN). Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Exterior Lights System Check | --
6 | Test CKT 17 (WHT) for an open. Refer to Testing for Continuity in Wiring Systems. Is CKT 17 OK? | -- | Go to Step 7 | Go to Step 8
7 | Replace the turn/hazard switch assembly. Is the repair complete? | -- | Go to Exterior Lights System Check | --
8 | Repair the suspect wiring. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Exterior Lights System Check | --