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1994 Ford Taurus Question: brake light fuse blows when brake is touched

 

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carrienkyle, 3.0L V6, Fultonham, OH, December 12, 2009, 09:11
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i have 1994 ford taurus every time i step on brake or touch it with my finger the brake light fuse blows then the shift interlock wont let the car come out of gear i have replaced the shift interlock and the brake light switch does same thing i have checked all wireing looks new and ground looks good but when i take brake light switch out it does not blow so does that mean the brake light switch is the plm since when i take it out the fuse doesnt blow any more please help car has been doin this for almost 3 weeks and car shop wants to charge me 75 an hour and no garuntee is will be fixed please help thanks

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  • Answer #1

    patrick mannion from Greg Solow's Engine Room, December 12, 2009, 09:44
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     Master

    I don't have a wiring diagram in front of me but if the brake light switch has only two wires on it (some brake light switches have more wires to operate cruise control or other functions), if it only has two wires and you bridge the wires with a paper clip and this operates the brake lights but does not blow the fuse then the brake light switch has a short internally going to ground on the mounting bracket but it is rare for a switch to short out in this way. Look at autozone.com there website has many workshop manuals free on line perhaps you can get a wiring diagram.

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    carrienkyle, December 12, 2009, 10:09
     Rookie

    ok if i can find someone to do this i dont know if they can do it i was just wondering with the brake light switch not plugged in if all the wireing still got power or not cause if i unplug brake lights it blows so they said it wasnt the brake lights i didnt know if the siwtch worked the same or if it was out the wireing has no power im lost and confused sorry to be such a pain

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    patrick mannion, December 13, 2009, 11:54
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    Try removing the brake light bulbs from their sockets press the pedal see if the fuse blows, if so defective or incorrect bulb?

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    Visitor, August 23, 2010, 18:22

    the head light switch is bad . there was a recall . see if the switch is hot when the num one fuse blows. and it doesnt come out of park

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  • Answer #2

    Visitor, April 19, 2010, 12:57

    you have a bare wire touching metal somwhere in the line and when you touch the brake it sends voltage through the wire and when it gets to the bare part in the wire that is touching metal it blows the fuse

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  • Answer #3

    Visitor, December 02, 2010, 08:43

    I have a 1994 Ford Tempo that was doing the same thing, I believe the wiring harness might be similair to the taurus, so hope this helps, I traced the brake wires back to the main harness above the fuse box, Ford engineers and all their greatness (not) ran the harness around sharp metal with no protection and the brake light wire was first in line to get rubbed raw, causing my fuse to blow, the wire is really hard to see , I had to remove the protection plate and cover below the steering wheel to see it, but if u have the same problem then its common in tempo and taurus, quick fix I put rubber over the sharp edge of the metal and repaired the brake wire... gl hope this helps

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