1. Turn the lights on.
2. Observe the taillamps.

Are the taillamps on?

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Go to Step 3

Go to Step 2

Repair the taillamps before completing this diagnostic table.

Does the center high mounted stop lamp (CHMSL) work after the taillamps are repaired?

--

System OK

Go to Step 3

1. Remove the CHMSL bulb.
2. Check the CHMSL bulb.

Is the lamp bulb defective?

--

Go to Step 4

Go to Step 5

Replace the CHMSL bulb.

Is the repair complete?

--

System OK

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

Is the resistance equal to the specified value?

0 ohms

Go to Step 7

Go to Step 6

Repair the open circuit between ground and the BLK wire in the CHMSL connector.

Is the repair complete?

--

System OK

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Repair the open circuit between the brake switch and the CHMSL.

Is the repair complete?

--

System OK

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