GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

  1. Disconnect the cigar lighter connector.
  2. Connect a test lamp between terminal A of the cigar lighter or the auxilary power outlet connector and ground.

Does the test lamp light?

--

Go to Step 2

Go to Step 3

2

Connect a test lamp between terminal A and terminal C of the cigar lighter or auxilary power outlet connector.

Does the test lamp light?

--

Go to Step 4

Go to Step 5

3

Backprobe the underhood wiring harness junction block connector C3 with a test lamp between terminal A1 and ground.

Does the test lamp light?

--

Go to Step 6

Go to Step 7

4

Replace the cigar lighter or auxilary power outlet. Refer to Cigar Lighter Housing Replacement in Instrument Panel, Gauges and Console.

Is the repair complete?

--

System OK

--

5

Repair the open in CKT 250 between the cigar lighter or the auxilary power outlet and ground splice pack G203. Refer to Wiring Repairs .

Is the repair complete?

--

System OK

--

6

Repair the open in CKT 40 between the underhood wiring harness junction block and the cigar lighter or the auxilary power outlet. Refer to Wiring Repairs .

Is the repair complete?

--

System OK

--

7

Replace the underhood wiring harness junction block. Refer to Underhood Fuse Block Replacement in Engine Electrical.

Is the repair complete?

--

System OK

--