Please help. Picked up a 1994 F-350 4x4 diesel 5 speed crew cab and been fixing things on it but I just can't figure this out. I've replaced the brake light switch on pedal and the turn/hazzard/wiper control muti-function switch on the column. I've removed all 3, yes 3! trailer light plugs the P.O. installed and removed/repaired/replaced all the screwed up wiring from all the trailer light stuff. There is no trailer brake controler in it now, but I think there used to be. I've looked for for wiring for a trailer brake controler to remove but can't find any. I don't know what else to do/ try/ remove. Suggestions?

Thanks

 

I appreciate all the views. I guess everybody is as stumped as I am.

 

Do they go out when you unplug the brake light switch? How about the multi function switch?

 

^ What he said. Check the brake light switch mounted to the metal brake pedal under the dash. If that isn't the problem there is most likely a short to power in the brake light circuit affecting both left/right sides before they split.

 

Trailer brake plugs into harness under dash on top of trans tunnel, its a 4 wire square plug. make sure there are NO plugs in it if there is no controller in cab.

 

The brake lights do NOT go out when I unplug the switch on the brake pedal. They DO go out when I unplug the multi function switch. I have replaced both the switch on the pedal and the multi function switch.

 

Hazard switch on?

 

Hazards function normally, the lights just stay on when I turn the hazard switch off.

 

How about if you remove the hazard flasher?

 

You mean the flasher itself, in the fuse block? I'll try that.

 

The hazard flasher is buried up in the passenger side somewhere if I remember correctly. You may have to remove the glove box to find it, but it's not the same as the turn signal flasher.

 

On a '94, the hazard flasher should be on the "blind" side of the interior fuse box. IIRC, only the '87-'91 generation had the hazard flasher over on the passenger side.

That poor flasher has been Ford's red-headed stepchild; for at least 18 model years, they couldn't come up with an accessible AND sensible place to put it.

 

By "blind side" do you mean the backside of the fuse block, twords the firewall?

 

There are 2 flashers on the fuse block on my 94. Right behind the same spot

 

Correct; the side you can't see.