Expedition mirror heating issue

I've got a 2003 Ford Expedition with a gasoline engine, and the mirror heating isn't working. The mirrors don't heat up at all, and there's an error code stored. I'm guessing it's a bad connection somewhere.

4 comment(s)

I had a similar issue with my 2018 Volvo XC60. Mirror heating also failed, and the diagnostic tool reported an open circuit. Are you familiar with the vehicle's LIN bus architecture? Mirror heating typically uses the LIN bus for temperature control, but given the error, a defective cable or plug connection of the component is the most probable cause.

LIN bus? Can you dumb that down a bit? I'm not sure I follow. Also, any ideas how hard is it to check the cable or plug connection myself?

Certainly. The Local Interconnect Network (LIN) bus is a serial communication system often used for less critical automotive components like mirror heating. However, based on your initial error, a multimeter test on the mirror's power supply would suffice, but I always recommend visiting a trusted shop. I went to the workshop to solve the problem on my Volvo.

Thanks for the info! Sounds like a trip to the shop is in order. They quoted me around 95€, so I'll get it sorted.

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