DerkRacer

So my truck was stuck in park the other day, the fuse was blown, so I replaced it and as Soo as I touched the brake it blew again, so I bought a new brake light switch, but that dost solve the problem, I looked over my trailer harness wiring and that seems to be fine. Anyone have any thoughts? Thanks!!

Ford 4x4

I would like to know as well my 87 does that also, I was thinking a short or bad ground someplace

13Harleyfan

Electrical problems are such a pain, pull out all the bulbs and inspect the sockets for moisture or corrosion, if I remember right, the brake light circuit runs thru the ignition switch and there are some threads floating around on how to check those.

13Harleyfan

If that doesn't help, P.M. me in the morning and tell you how to search for the short.

Ford 4x4

Well.....I may have found my problem, the ignition switch just went out on me yesterday. Maybe the lights were a sign of it going out earlier.

DerkRacer

I think I found my problem, after changing the brake light switch, and testing the other switch on the master cylinder, and the trailer wiring plug, I believe the short is between brake light pigtail to the taillight themselves, because when I unplug my brake lights the short goes away, so Tom I need to pull out the wiring and look for the short, thanks for y'all's help and hopefully this will help some of y'all in the future.

Just call me Sean

iTrader: (1)

The brake light signal goes through the turn signal (multi function) switch. Do the hazards work?

DerkRacer

Yes the hazards still work, should they still work or are you getting at thatmy problem is probably not in the rear wiring?

Just call me Sean

iTrader: (1)

Probably the wire from the brake switch to the turn signal switch. Otherwise the hazards would blow a fuse too.

Ford 4x4

My hazards do not work on my 87. So would that mean it is the multifunction switch?