GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Did you perform the Outside Mirror System Check?

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Go to Step 2

Go to Outside Mirrors System Check

2

Using a digital multimeter (DMM) in order to backprobe the outside rear view mirror switch connector from terminal H (ORN) to ground.

Is the voltage within the specified range?

10-15 V

Go to Step 3

Go to Step 9

3

Using a DMM in order to backprobe the outside rear view mirror switch connector from terminal H (ORN) to terminal A (BLK).

Is the voltage within the specified range?

10-15 V

Go to Step 4

Go to Step 10

4

Using a DMM in order to backprobe the outside rear view mirror switch connector from terminal H (ORN) to terminal C (TAN/WHT).

Is the voltage within the specified range?

10-15 V

Go to Step 5

Go to Step 11

5

Using a DMM in order to backprobe the outside rear view mirror switch connector from terminal H (ORN) to terminal B (BRN).

Is the voltage within the specified range?

10-15 V

Go to Step 6

Go to Step 11

6

Using a DMM in order to backprobe the outside rear view mirror switch connector from terminal H (ORN) to the memory mirror module (MMM) connector terminal F8 (TAN/WHT).

Is the voltage within the specified range?

10-15 V

Go to Step 7

Go to Step 12

7

Using a DMM in order to backprobe the outside rear view mirror switch connector from terminal H (ORN) to the MMM connector terminal E8 (BRN).

Is the voltage within the specified range?

10-15 V

Go to Step 8

Go to Step 13

8

Replace the MMM. Refer to Memory Mirror Module Replacement .

Is the repair complete?

--

Go to Outside Mirrors System Check

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9

Repair the open in CKT 1740 (ORN) between S505 and the outside rear view mirror switch. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Outside Mirrors System Check

--

10

Repair the open in CKT 50 (BLK) between S200 and the outside rear view mirror switch. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Outside Mirrors System Check

--

11

Replace the power mirror switch. Refer to Front Side Door Window Switch Replacement .

Is the repair complete?

--

Go to Outside Mirrors System Check

--

12

Repair the open in CKT 299 (TAN/WHT) between the outside rear view mirror switch and the MMM. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Outside Mirrors System Check

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13

Repair the open in CKT 303 (BRN) between the outside rear view mirror switch and the MMM. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Outside Mirrors System Check

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