GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Was the entire Exterior Lights System Check performed?

--

Go to Step 2

Go to Exterior Lights System Check

2

Check the rear junction block DIMR Fuse for an open.

Is the DIMR Fuse OK?

--

Go to Step 3

Go to Step 4

3

Replace the rear junction block. Refer to Rear Junction Block Replacement.

Is the rear junction block replacement complete?

--

Go to Exterior Lights System Check

--

4

Repair the short to ground in CKT 32 (YEL). Refer to Wiring Repairs in Wiring Systems.

Is the circuit repair complete?

--

Go to Step 5

--

5

Replace the DIMR Fuse in the rear junction block. Refer to Wiring Repairs in Wiring Systems.

Is the fuse replacement complete?

--

Go to Exterior Lights System Check

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