Ford B166a60 _best_ -

: In some cases, the heater may work occasionally if there is a loose wire or a failing heating element. Potential Causes

: Open the door and check the wiring harness inside the rubber boot (the "accordion" tube) between the door and the frame. Broken wires here are a common Ford issue due to constant opening and closing. ford b166a60

: The constant opening and closing of the driver or passenger door can fatigue the wires inside the rubber boot, eventually leading to a break. : In some cases, the heater may work

: A "Trailer Lighting Fault" or "Check Trailer Lamps" message may appear on the instrument cluster. Potential Causes : In some cases

Ford B166A:60 is a diagnostic trouble code (DTC) that indicates an open circuit in the heated mirror system