GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Did you perform the Outside Mirrors System Check?

--

Go to Step 2

Go to Outside Mirrors System Check

2

Are both mirrors inoperative?

--

Go to Step 3

Go to Step 13

3

Is the fuse blown?

--

Go to Step 18

Go to Step 4

4

  1. Disconnect the outside rear view folding mirror switch.
  2. Turn the ignition switch to the RUN position.
  3. Connect a test lamp from CKT 1301 (DK GRN) cavity A at the outside rear view folding mirror switch connector to ground.

Does the test lamp light?

--

Go to Step 5

Go to Step 8

5

Connect a test lamp from CKT 1301 (DK GRN) cavity A to CKT 1850 (BLK) at the outside rear view folding mirror switch connector to ground.

Does the test lamp light?

--

Go to Step 6

Go to Step 9

6

  1. Reconnect the outside rear view folding mirror switch.
  2. Disconnect Connector C501.
  3. Place the outside rear view folding mirror switch to the EXTEND position.
  4. Connect a test lamp from connector C501 terminal H, CKT 190 (YEL) to ground.

Does the test lamp light?

--

Go to Step 7

Go to Step 10

7

  1. Place the outside rear view folding mirror switch to the RETRACT position.
  2. Connect a test lamp from connector C501 terminal K, CKT 191 (LT BLU) to ground.

Does the test lamp light?

--

Go to Step 12

Go to Step 11

8

Locate and repair the open in CKT 1301 (DK GRN) between the outside rear view folding mirror switch and the IP fuse block.

Is the repair complete?

--

Go to Outside Mirrors System Check

--

9

Locate and repair the open in CKT 1850 (BLK) between the outside rear view folding mirror switch and G202.

Is the repair complete?

--

Go to Outside Mirrors System Check

--

10

Locate and repair the open in CKT 190 (YEL) between the outside rear view folding mirror switch and connector C501 terminal H.

Is the repair complete?

--

Go to Outside Mirrors System Check

--

11

Locate and repair the open in CKT 191 (LT BLU) between the outside rear view folding mirror switch and connector C501 terminal K.

Is the repair complete?

--

Go to Outside Mirrors System Check

--

12

Replace the outside rear view switch.

Is the repair complete?

--

Go to Outside Mirrors System Check

--

13

  1. Disconnect the appropriate outside rear view mirror.
  2. Turn the ignition switch to the RUN position.
  3. Place the outside rear view folding mirror switch to the EXTEND position.
  4. Connect a test lamp from CKT 190 (YEL) cavity J at the outside rear view mirror connector to ground.

Does the test lamp light?

--

Go to Step 14

Go to Step 15

14

  1. Place the outside rear view folding mirror switch to the RETRACT position.
  2. Connect a test lamp from CKT 191 (LT BLU) cavity K at the outside rear view mirror connector to ground.

Does the test lamp light?

--

Go to Step 17

Go to Step 16

15

Locate and repair the open in CKT 190 (YEL) between the outside rear view mirror and connector C501 terminal H.

Is the repair complete?

--

Go to Outside Mirrors System Check

--

16

Locate and repair the open in CKT 191 (LT BLU) between the outside rear view mirror and connector C501 terminal K.

Is the repair complete?

--

Go to Outside Mirrors System Check

--

17

Replace the appropriate rear view mirror.

Is the repair complete?

--

Go to Outside Mirrors System Check

--

18

Locate and repair the short to ground in the following circuits:

    • CKT 1301 (DK GRN)
    • CKT 190 (YEL)
    • CKT 191 (LT BLU)

--

Go to Outside Mirrors System Check

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