Horn not working....

Discussion in 'Fox 5.0 Mustang Tech' started by FiveO, Dec 17, 2006.

  1. FiveO

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    Gotta get my cars safety inspection done soon. My horn isn't working and it hasn't worked since i dropped a penny in the cigar lighter lol (started to smoke) which doesn't work either. In my manuals they don't say what fuse goes to what, and the electrical diagrams are confusing as hell.

    By dropping that penny in the cigar lighter, im guessing i blew a fuse. should i just start pulling fuses till i find one blown? is it a fuseless system? Does that have anything to do with the horn not working? is the horn a fuseless system? Worse...could i have melted the wires?
     
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  2. jrichker

    jrichker StangNet's favorite TOOL
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    The same #16 fuse that works the cigar lighter works the horns.

    Diagram courtesy of Tmoss & Stang&2birds

    [​IMG]

    If you replace the fuse and it still blows, then you have other problems. The horns typically develop an internal short to ground, which causes the fues to blow. :eek:

    The horns are located under the car on the driver's side, forward of the front wheel well. Disconnect BOTH horns, replace the fuse: if the fuse blows immediately, the problem is most likely in the cigar lighter circuit. If not, then press the horn button on the steering wheel: if the fuse blows the problem is in the wiring between the horn relay and the horn. If doesn't blow when you press the horn button, connect ONE of the horns and try again. If it still doesn't blow the fuse, connect the other horn. Chances are that the first horn you re-connect will blow the fuse. Whatever horn blows the fuse at this point has an internal short and is trash. Time for a trip to the junkyard... :crazy:


    See the following website for some help from Tmoss (diagram designer) & Stang&2Birds (website host) for help on 88-95 wiring http://www.veryuseful.com/mustang/tech/engine/

    http://www.veryuseful.com/mustang/tech/engine/images/IgnitionSwitchWiring.gif

    http://www.veryuseful.com/mustang/tech/engine/images/fuel-alt-links-ign-ac.gif

    http://www.veryuseful.com/mustang/tech/engine/images/88-91_5.0_EEC_Wiring_Diagram.gif
     
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  3. FiveO

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    wow nice diagram, thanks for that. don't have time to check the problem right now, but when i dropped the penny in the cigar lighter it shorted making small bit of smoke and im certain thats what blew the fuse. thanks again.
     
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