My turn signals and heater stopped working. At first they would come back on after about twenty minutes of driving. But today I drove about an hour and they never came back. Everything else works just fine. It's a 92 5.0. Any ideas? Thanks guys!
Revised 7-June-2014 to add Torx bit picture and source. Also added replacement ignition switch wiring pigtail picture, part numbers and sources.
Some of the symptoms of ignition switch problems are things that don’t work or are intermittent like radio, turn signals, wipers or heater.
There was a FREE recall on Ford ignition switches. They overheat and sometimes catch fire. That burns up the steering column and sometimes the car interior. Since this is very old information, you may not be able to get the switch replaced for free anymore. The auto parts stores sell the switches for $13-$15.
While you are working on the switch, check the wiring and connector closely. A replacement connector with new wiring pigtails is available from most auto parts stores
AutoZone and Advanced Auto Parts have the same Part Number: 434 - may have to order, not always in stock
Autocraft torx bit set – have small hole in tip for tamper proof screws.
Part No. AC571/W1386 Cost approx. $12 +tax
Diagrams courtesy of Tmoss & Stang&2birds
Ignition switch wiring
Fuel, alternator, A/C and ignition wiring
See the following website for some help from Tmoss (diagram designer) & Stang&2Birds (website host) for help on 88-95 wiring Mustang FAQ - Wiring & Engine Info Everyone should bookmark this site.