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The truck I bought had the "tow mirrors" on it and one was broke so the guy I bought it from put the non tow mirrors on it and I want to know if my truck has heated mirrors or not cause that's that was on it before he changed them out..
Heated Mirrors began in 1988 of the F-Series. The only way to know is to look at the wires in the doors, find the build-sheet, or, sometimes the Dealer can look it up with the last 8# of the Vin. These were optional on Lariats, and could be added to an XLT if an ordered build was requested (along with Cab Marker Lamps $56.00 for the Lamps and $212.00 for the Mirrors).
Another way is to Put the Defroster "ON" and touch the mirror. It will also have a Heater Symbol is equipped.
Adding them is fairly easy. Using Ford Part#: F3TZ18C621B Switch, Defroster, Timed, from a Explorer
The switch is a surface mount. requires cutting hole to dimensions.
Explorer Wiring Diagram. Use this wiring diagram and fuse circuit.