I have heated mirrors, but now they are not working. the power windows and mirrors work. i have checked all the fuses and they are all good. any ideas??

 

My driver mirror seems to be having the same problem.. anyone know whats wrong???

 

The mirrors just pop on and off, you could check to make sure the two heater connections behind haven't corroded.

 

A little more info:

Power for the mirrors goes through the Central Junction Box fuses F114 (40A) and F8(10A) and the heated rear window relay.

Also, once you get the mirror off, you can use a multimeter to:

1. check continuity in the mirror and make sure there isn't a gap in the heater element
2. check voltage input from the wires coming from the truck.

FYI, a new heated mirror piece from ford is $21.

 

question I have is: when do the mirrors heat? Is there a switch you activate to cause them to heat, or are they tied into the auto climate control unit?

Or do they activate automatically based on outside air temps?

Once these questions are answered, then one can start troubleshooting, as a centralized point would be determined and a multimeter can be used to detect voltage to the heated elements in the mirrors (assuming they have a heat element).

My "basic" STX does not have them, so I'm oblivious as to what makes them go on.

 

My Lariat has a switch at the climate control section, but the electrical diagrams look like there may have been an "automatic" option available as well.

 

Good start. If the original poster has the same model as you, I'd suggest that the switch be the starting point, especially if both heated mirrors bit the dust at the same time. It's not the norm for two or more items to fail at once, without it being a "common" source of failure.

A bad switch or broken wire/loose connection is my first point of failure guess (since the original poster said there were no blown fuses). If someone was working on another problem in or around this switch area also increases the odds, as it's easy to cause another failure when pulling wires, disconnecting or removing panels, etc.

If it's an automatic type option, then those get a bit more complicated, especially if its a "black box" type of unit, as the Ford schematics do not offer us the schematic for these boxes themselves; they are either "on" or "off" and cannot be repaired individually.

And they can be costly too. I hope for the best with this poster. I would recommend though that he does not just go out and buy new mirrors or heating elements (assuming the heating elements are replacable) until he's sure that is the fault. It gets expensive throwing parts at a fault; eventually you repair it, but at a cost of un-needed parts.

 

My guess would be that SC Native's issue is a bad element or connection at the drivers mirror.

I agree with Bucko, most likely the switch for the original poster. Definitely check the rear window heater relay as well.

 

i kinda have the same problem but on the driver side the only part of the mirror that heats up is the top right hand corner.. the passenger side heats up just fine. can anyone explain that one?

 

I'd guess the heating element is broken or has seperated from the glass. You can pull the mirror straight out of the housing and check the back of it. Be careful not to break the glass.