For 1990-2009 cars

Step | Action | Value(s) | Yes | No
--- | --- | --- | --- | ---
DEFINITION: One of the heated seats is always on.
1 | Did you review the system operation and perform the necessary inspections? | -- | Go to Step 2 | Go to Symptoms - Seats
2 | Verify the fault is present. Does the system operate normally? | -- | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3
3 |

1. Turn the Ignition Off.
2. Test the Ignition 3 voltage circuit to the Seat Heater Module for a short to voltage.

Refer to Circuit Testing and Wiring Repairs

Did you find and correct the condition?

Go to Step 6

Go to Step 4

4 |

1. Turn the heated seat switch Off.
2. Turn the Ignition On.
3. Test the Ignition 3 voltage circuit to the Seat Heater Module for a short to voltage.

Refer to Circuit Testing and Wiring Repairs

Is there voltage on the Ignition 3 circuit?

Go to Step 5

5 | Inspect for poor connections at the harness connector of the heated seat switches in the Rear Window Wiper/Washer and Multifunction Switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

If a poor connection is not found, replace the Rear Window Wiper/Washer and Multifunction Switch. Refer to Multifunction Switch Assembly Replacement - Instrument Panel in Lighting.

Did you find and correct the condition?

Go to Step 6

6 | Operate the system in order to verify the repair. Did you correct the condition? | -- | System OK | Go to Step 3