For 1990-2009 cars

Step | Action | Yes | No
--- | --- | --- | ---
1 |

1. Press the brake pedal.
2. Observe the stop lamps.

Are the stop lamps ON?

Go to Step 3

Go to Step 2

2 | Repair the stop lamps before completing this diagnostic table. Does the center high-mounted stop lamp (CHMSL) work after the tail lamps are repaired? | System OK | Go to Step 3
3 |

1. Remove the CHMSL bulb.
2. Test the CHMSL bulb.

Is the lamp bulb defective?

Go to Step 4

Go to Step 5

4 | Replace the CHMSL bulb. Refer to High Mount Stop Lamp Replacement . Is the repair complete? | System OK | --
5 |

1. Disconnect the CHMSL connector.
2. Use an ohmmeter to measure the resistance between ground and the BK wire in the CHMSL connector.

Does the ohmmeter indicate continuity?

Go to Step 7

Go to Step 6

6 | Repair the open circuit between ground and the BK wire in the CHMSL connector. Is the repair complete? | System OK | --
7 | Repair the open circuit between the brake switch and the CHMSL. Is the repair complete? | System OK | --