Test the rear window defogger.

Does the rear window defogger work?

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Go to Step 4

Go to Step 2

Repair the rear window defogger before proceeding with the outside rearview mirror diagnosis.

Is the repair complete?

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Go to Step 3

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Test the outside rearview mirror defoggers.

Does the repair of the rear window defogger system also fix the problem with the outside rearview mirror defoggers?

--

System OK

Go to Step 4

Inspect fuse F18.

Is fuse F18 open?

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Go to Step 5

Go to Step 6

1. Inspect for a short circuit and repair it, if necessary.
2. Replace the fuse.

Is the repair complete?

--

System OK

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1. On the side of the vehicle which has the malfunctioning outside rearview mirror defogger, remove the black plastic escutcheon from the trim panel side of the door.
2. Disconnect the outside rearview mirror electrical connector.
3. Turn the ignition ON.
4. Turn on the defogger.
5. Use a voltmeter to backprobe terminal 3 (ORN) at the outside rearview mirror electrical connector.

Does the voltmeter indicate the specified value?

11-14 V

Go to Step 8

Go to Step 7

Repair the open circuit between fuse F18 and the outside rearview mirror connector.

Is the repair complete?

--

System OK

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1. Turn the ignition OFF.
2. Disconnect the outside rearview mirror electrical connector.
3. Use an ohmmeter to measure the resistance between terminal 8 (BK) of the outside rearview mirror connector and ground.

Does the ohmmeter indicate the specified value?

0 ohms

Go to Step 10

Go to Step 9

Repair the open ground circuit for the outside rearview mirror.

Is the repair complete?

--

System OK

--

Replace the defective outside rearview mirror.

Is the repair complete?

--

System OK

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