For 1990-2009 cars

Step | Action | Yes | No
--- | --- | --- | ---
Schematic Reference: Outside Rearview Mirror Schematics
1 | Did you review the Heated Mirror Description and Operation and perform the necessary inspections? | Go to Step 2 | Go to Symptoms - Doors
2 |

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

3 | Are both heated mirrors inoperative? | Go to Step 4 | Go to Step 6
4 |

1. Disconnect the heated mirror switch.
2. Turn ON the ignition, with the engine OFF.
3. Connect a test lamp between the ignition 3 voltage circuit at the heated mirror switch harness connector and a good ground.

Did the test lamp illuminate?

Go to Step 5

Go to Step 10

5 | Connect a fused jumper between the ignition 3 voltage and the mirror heating element supply voltage circuits at the heated mirror switch harness connector. Do the heated mirrors operate normally? | Go to Step 8 | Go to Step 11
6 |

1. Disconnect the inoperative mirror.
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 7

Go to Step 11

7 | 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 9 | Go to Step 11
8 | 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 15 | Go to Step 12
9 | Inspect for poor connections at the heated mirror. 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 15 | Go to Step 13
10 | Repair the open the battery positive voltage circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 15 | --
11 | Repair the open 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 15 | --
12 | Repair the open in the mirror ground circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 15 | --
13 | Replace the heated mirror switch. Did you complete the repair? | Go to Step 15 | --
14 | Replace the heated mirror. Did you complete the repair? | Go to Step 15 | --
15 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 3