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1993 ford f-150 brake and tail lights wont work


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huntersmith18
Novice

Nov 18, 2011, 3:31 PM

Post #1 of 5 (1829 views)
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1993 ford f-150 brake and tail lights wont work Sign In

I have a 93 Ford f-150 and the brake lights and tail lights wont work I tried putting a new light switch in it but it didn't help my bulbs are good and my blinkers work but as soon as I put a new fuse in when I touch my brakes it blows now I am 17 and I live with my grandfather's and he is disabled this is our only means of transportation I work 2 jobs so I need this fixed please help


Hammer Time
Ultimate Carjunky / Moderator
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Nov 18, 2011, 4:01 PM

Post #2 of 5 (1810 views)
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Re: 1993 ford f-150 brake and tail lights wont work [In reply to] Sign In

You have a short in the brake light circuit and you are going to have to disconnect things until it stops blowing fuses to find the short.








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Sidom
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Nov 18, 2011, 5:30 PM

Post #3 of 5 (1799 views)
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Re: 1993 ford f-150 brake and tail lights wont work [In reply to] Sign In

If you have any add on trailer wiring, I would disconnect that 1st, seen a lot of problem areas there...

To keep from going thru fuses. Hook a test light up to a 12v source (battery or whatever). Probe the load side of the circuit at the brk pedal. Push the pedal & if the light comes on, that would indicate a short. Start disconnecting circuits until the light goes out. Once it goes out, that is the area with the short....






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Discretesignals
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Nov 18, 2011, 8:09 PM

Post #4 of 5 (1785 views)
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Re: 1993 ford f-150 brake and tail lights wont work [In reply to] Sign In

I agree. 90% of the time we see this in the shop it has something to do with how the wiring was done for the trailer harness or a wiring problem in the trailer itself.





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Tom Greenleaf
Ultimate Carjunky / Moderator
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Nov 19, 2011, 6:25 AM

Post #5 of 5 (1775 views)
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Re: 1993 ford f-150 brake and tail lights wont work [In reply to] Sign In

Agree now third time. Trailer wiring frequently hacked if it ever was done over the years and will fail there more than other places,

T
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