GM Service Manual Online
For 1990-2009 cars only

Diagnostic Aids

If there are several other symptoms, including an inoperative radiator fan, the windshield washer pump, or the turn signal lamps, check ground G102 and G104.

Step

Action

Values

Yes

No

1

Check fuses Ef24, Ef18, Ef17, and F14.

Are any fuses blown?

--

Go to Step 2

Go to Step 4

2

  1. Check for a short circuit and repair it, if necessary.
  2. Replace the fuse.

Is the repair complete?

--

Go to Step 3

--

3

Turn the low beam headlamps on.

Do the low beam headlamps work?

--

Go to Step 6

Go to Step 4

4

Check the low beam headlamps system. Refer to Headlamps Inoperative - Low Beams .

Is any problem found?

--

Go to Step 5

--

5

Repair the problem.

Is the repair complete?

--

Go to Step 6

--

6

Turn the high beam headlamps on.

Do the high beam headlamps work?

--

System OK

Go to Step 7

7

Check the high beam headlamps system. Refer to Headlamps Inoperative - High Beams .

Is any problem found?

--

Go to Step 8

--

8

Repair the problem.

Is the repair complete?

--

System OK

--