Brake Light Switch: Testing and Inspection

Brake Lights Circuit Diagram:

Brake Light Switch Test
1. If the brake lights do not go on, check the No.37 (20A) fuse in the under-hood main fuse box, the brake light bulbs in the taillight assembly, and the high mount brake light
2. If the fuse and bulbs are OK, disconnect the 2-P or 4-P connector from the brake light switch.





3. Check for continuity between the B and C terminals. There should be continuity with the brake pedal pushed.

- If there is no continuity, replace the switch or adjust pedal height.
- If there is continuity, but the brake lights do not go on, check for:

- Poor ground
- Hatchback: G5221, G601
- Sedan : G621
- An open in the WHT/GRN or GRN/WHT wire.