Having trouble with my ford its a 2000 f250 7.3 4x4 having issues with brake as soon as i press brake when on thr battery gauge goes down this only happens when on changed batterys change alternators check fuses and nothing need help cause it doesnt let me change into gear when on need to turn key alittle and put in neatural and then turn on would really appreciate help thanks...

 

Possible dead short in the brake pedal switch. Check for a damaged wiring harness down there.

 

I recently changed the brake light switch and still kept doing the same thing but gonna check for a short somewhere but have been checking for a short for almost 2 weeks and haven't found ntn yet wat else could it be

 

Have you checked your wiring for the trailer hitch?

 

No thats something that never crossed my mind ima check that as of right now thanks

 

Still haven't found problem with truck getting frustrated dealing with same problem evryday dont wana take it to dealership gna cost me a whole lot of money help me out!!!thanks

 

Pull some brake light/flasher relays and the trailer connector relays. If the problem doesn't clear, at least you've eliminated everything past the relays.

 

Possibly a short in the trailer electrical connector(s),,,

 

I'm having trouble shooting my Ford too! But, I'm close!!

 

It just hit me... look into this: [LINK]