GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Test the C/LTR fuse #7 for an open.

Is the fuse open?

--

Go to Step 2

Go to Step 3

2

Test and repair circuit 840 for a short to ground.

Did you find and correct the condition?

--

Go to Step 8

Go to Step 7

3

  1. Disconnect the cigar lighter connector.
  2. Connect a test light from the cigar lighter connector terminal A to ground.

Does the test light illuminate?

--

Go to Step 4

Go to Step 5

4

  1. With the cigar lighter connector disconnected.
  2. Connect a test light from the cigar lighter connector terminals A to B.

Does the test light illuminate?

--

Go to Step 7

Go to Step 6

5

Repair the open or high resistance in circuit 840.

Is the repair complete?

--

Go to Step 8

--

6

Repair the open or high resistance in circuit 150.

Is the repair complete?

--

Go to Step 8

--

7

Replace the cigar lighter.

Is the repair complete?

--

Go to Step 8

--

8

Operate the system in order to verify the repair.

Did you correct the condition?

--

System OK

Go to Step 1