Warning signs that your Chevrolet Blazer's heated seat control module might be failing include:
- Heated seats not turning on at all.
- Heated seats only working intermittently (sometimes on, sometimes off).
- Heated seats getting too hot, even on the lowest setting.
- Only one heated seat working.
- A burning smell coming from the seats.
- The heated seat indicator light flashing or not turning on.
To figure out if the control module is the problem, you can try these tests:
- Check the fuses: Look at the fuse box diagram in your owner's manual and check the fuses related to the heated seats. A blown fuse is an easy fix.
- Inspect the wiring: Look for any damaged or loose wires connected to the heated seats and the control module.
- Test the seat heating elements: Use a multimeter to check if the heating elements in the seats have continuity (are not broken). If they don't, the heating element itself may be the problem, not the control module.
- Swap the modules (if possible): If your Blazer has separate modules for each seat, try swapping them. If the problem switches to the other seat, the module is likely the issue.
Common reasons why these modules fail:
- Overheating: Repeatedly using the heated seats on high settings can cause the module to overheat and fail.
- Electrical surges: Power surges in the vehicle's electrical system can damage the module.
- Moisture: Water or other liquids spilled on the seats can seep into the module and cause corrosion.
- Vibration: Constant vibration from driving can loosen connections inside the module.
- Age: Like any electronic component, the module can simply wear out over time.
