GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

DEFINITION: All of the heated mirrors are inoperative on one side of the vehicle.

1

Did you perform the Outside Mirrors System Check ?

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Go to Step 2

Go to Outside Mirrors System Check

2

  1. Disconnect the front door module connector C4 at the malfunctioning location.
  2. Using a digital multimeter (DMM), measure the resistance between the front door module harness connector C4 terminal 4 and terminal 8.

Is the resistance within the specified range?

2.5-20ohms

Go to Step 3

Go to Step 4

3

Replace the malfunctioning front door module. Refer to Door Control Module Replacement .

Is the replacement complete?

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Go to Outside Mirrors System Check

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4

Test CKT 267 (BLK) for an open or a short to ground.

Is the circuit OK?

--

Go to Step 5

Go to Step 6

5

Test CKT 9089 (BLK) for an open.

Is the circuit OK?

--

Go to Step 8

Go to Step 7

6

Repair the open or the short to ground in CKT 267 (BLK). Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Outside Mirrors System Check

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7

Repair the open in CKT 9089 (BLK). Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Outside Mirrors System Check

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8

Replace the malfunctioning power mirror. Refer to Power Mirror Replacement .

Is the repair complete?

--

Go to Outside Mirrors System Check

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