Schematic Reference: Outside Rearview Mirror Schematics

Did you review the Heated Mirror Description and Operation and perform the necessary inspections?

Go to Step 2

Go to Symptoms - Doors

1. Turn ON the ignition, with the engine OFF.
2. Depress the heated mirror switch.

Do the heated mirrors operate normally?

Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems

Go to Step 3

Are both heated mirrors inoperative?

Go to Step 4

Go to Step 10

1. Turn ON the ignition, with the engine OFF.
2. With a test lamp connected to a good ground, probe the ignition 3 voltage circuit at the heated mirror switch harness connector.

Did the test lamp illuminate?

Go to Step 5

Go to Step 15

1. Turn ON the ignition, with the engine OFF.
2. With a test lamp connected to a good ground, probe the heating element supply voltage circuit (cavity C) at the heated mirror switch harness connector.
3. Depress the heated mirror switch.

Does the test lamp illuminate when the switch is depressed?

Go to Step 6

Go to Step 12

1. Remove the heated mirror relay.
2. Turn ON the ignition, with the engine OFF.
3. With a test lamp connected to a good ground, probe the heating element supply voltage circuit for the control side of the relay at the I/P fuse block.
4. Depress the heated mirror switch.

Does the test lamp illuminate when the switch is depressed?

Go to Step 7

Go to Step 16

With a test lamp connected to battery voltage, probe the relay ground circuit at the I/P fuse block.

Does the test lamp illuminate?

Go to Step 8

Go to Step 17

1. Turn ON the ignition, with the engine OFF.
2. With a test lamp connected to a good ground, probe the ignition 3 voltage circuit for the heated mirror relay at the I/P fuse block.

Does the test lamp illuminate?

Go to Step 9

Go to Step 15

1. Turn ON the ignition, with the engine OFF.
2. Connect a 15 amp fused jumper between the ignition 3 voltage circuit and the heating element supply voltage circuit at the I/P fuse block.

Do the heated mirrors operate?

Go to Step 13

Go to Step 16

1. Disconnect the inoperative heated mirror glass.
2. Connect a test lamp between the mirror heating element supply voltage circuit at the inoperative mirror harness connector and a good ground.
3. Depress the heated mirror switch to activate the system.

Does the test lamp illuminate?

Go to Step 11

Go to Step 15

With the system still active, connect a test lamp between the mirror heating element supply voltage circuit and the mirror ground circuit.

Does the test lamp illuminate?

Go to Step 14

Go to Step 17

Inspect for poor connections at the heated mirror switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 21

Go to Step 18

Inspect for poor connections at the heated mirror relay. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 21

Go to Step 19

Inspect for poor connections at the heated mirror glass. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 21

Go to Step 20

Repair the open or short to ground in the ignition 3 voltage circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 21

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Repair the open or short to ground in the mirror heating element supply voltage circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 21

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Repair the open in the ground circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you complete the repair?

Go to Step 21

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Replace the heated mirror switch. Refer to Accessory Switch Replacement in Instrument Panel, Gages, and Console.

Did you complete the repair?

Go to Step 21

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Replace the heated mirror relay.

Did you complete the repair?

Go to Step 21

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Replace the heated mirror glass. Refer to Outside Rearview Mirror Glass Replacement - Upper .

Did you complete the repair?

Go to Step 21

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Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 3