GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Did you perform the Exterior Lights System Check?

--

Go to Step 2

Go to Exterior Lights System Check

2

Inspect the LR PRK LP fuse in the underhood fuse block.

Is the fuse open?

--

Go to Step 3

Go to Step 4

3

Locate and repair short to ground in CKT 2509 (BRN ) and/or CKT 2209 (BRN).

Is the repair complete?

--

Go to Exterior Lights System Check

--

4

Connect a test lamp between ground and terminal B of the tail lamp socket.

Does the test lamp light?

--

Go to Step 6

Go to Step 5

5

Locate and repair the open in CKT 2509 (BRN) and/or CKT 2209 (BRN).

Is the repair complete?

--

Go to Exterior Lights System Check

--

6

With the bulb removed, connect a test lamp between terminal G and terminal B of the tail lamp socket.

Does the test lamp light?

--

Go to Step 8

Go to Step 7

7

Locate and repair the open in CKT 1350 (BLK) between the tail/stop lamp and ground G450.

Is the repair complete?

--

Go to Exterior Lights System Check

--

8

Replace the inoperative bulb.

Is the repair complete?

--

Go to Exterior Lights System Check

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