GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Did you perform the Lighting Systems Diagnostic System Check?

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Go to Step 2

Go to Diagnostic System Check - Lighting Systems

2

Disconnect the stoplamp/BTSI switch connector C1.

Do the stoplamps turn off?

--

Go to Step 3

Go to Step 4

3

Replace the stoplamp/BTSI switch. Refer to Stop Lamp Switch Replacement in Brakes.

Is the stoplamp/BTSI switch replacement complete?

--

Go to Step 5

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4

Repair the short to battery positive voltage (B+) in CKT 17 (WHT). Refer to Wiring Repairs in Wiring Systems.

Is the circuit repair complete?

--

Go to Step 5

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5

Operate the system in order to verify the repair.

Did you correct the condition?

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System OK.

Go to Step 2