GM Service Manual Online
For 1990-2009 cars only

Step

Action

Values

Yes

No

1

Was the Exterior Lights System Check performed?

--

Go to Step 2

Go to Exterior Lights System Check

2

  1. Turn the light switch to the PARK position.
  2. Backprobe connector C8 of the junction block with a test lamp from cavity 2 to ground.

Does the test lamp light?

--

Go to Step 3

Go to Step 4

3

Repair the open in the RED/YEL wire between S405 and the junction block. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Exterior Lights System Check

--

4

Test for an open in the RED/YEL wire between the junction block and S204.

Was an open found?

--

Go to Step 6

Go to Step 5

5

Replace the junction block.

Is the repair complete?

--

Go to Exterior Lights System Check

--

6

Repair the open. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Exterior Lights System Check

--