GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Did you perform the Defogger System Check?

--

Go to Step 2

Go to Defogger System Check in Stationary Windows

2

Is the HTDMIR fuse in the underhood fuse block blown?

--

Go to Step 3

Go to Step 4

3

Repair the short to ground in CKT 2267 (ORN).

Is the repair complete?

--

Go to Defogger System Check in Stationary Windows

--

4

Are both mirrors inoperative?

--

Go to Step 5

Go to Step 6

5

Repair the open in CKT 2267 (ORN) between connector C501 terminal A8 (4 door) or C500 terminal P (2 door) and the underhood fuse block.

Is the repair complete?

--

Go to Defogger System Check in Stationary Windows

--

6

  1. Disconnect the appropriate outside rear view mirror.
  2. Turn the Ignition to the run position.
  3. Turn on the defoggers.
  4. Connect the J 39200 digital multimeter (DMM) between CKT 2267 (ORN) at cavity A of the appropriate outside rear view mirror connector and ground.

Is battery voltage present?

--

Go to Step 7

Go to Step 8

7

Connect the J 39200 DMM between CKT 2267 (ORN) at cavity A and CKT 1850 (BLK) at cavity H of the appropriate outside rear view mirror connector.

Is battery voltage present?

--

Go to Step 10

Go to Step 9

8

Locate and repair the open in CKT 2267 (ORN) between the outside rear view mirror and connector C500 (2 door) or C501 (4 door).

Is the repair complete?

--

Go to Defogger System Check in Stationary Windows

--

9

Locate and repair the open in CKT 1850 (BLK) at the LH outside rear view mirror and G202 or CKT 1050 (BLK) at the RH outside rear view mirror and G205.

Is the repair complete?

--

Go to Defogger System Check in Stationary Windows

--

10

Replace the appropriate rear view mirror.

Is the repair complete?

--

Go to Defogger System Check in Stationary Windows

--