GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Has the Outside Mirrors System Check been performed?

--

Go to Step 2

Go to Outside Mirrors System Check

2

  1. Disconnect connector C501.
  2. Connect a DMM between cavity A of connector C501 and ground.
  3. Place the ignition switch in the RUN position.
  4. Depress the rear defogger switch.

Is there battery voltage?

--

Go to Step 4

Go to Step 3

3

Locate and repair the open in CKT 267 (ORN) between connector C501 and the heated mirror relay. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Outside Mirrors System Check

--

4

Connect a DMM between cavity H of connector C501 and ground.

Is there battery voltage?

--

Go to Step 6

Go to Step 5

5

Locate and repair the open in CKT 150 (BLK) between connector C501 and G202. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Outside Mirrors System Check

--

6

Replace the LH heated mirror. Refer to Outside Rearview Mirror Replacement .

Is the repair complete?

--

Go to Outside Mirrors System Check

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