Brake controller
Thread Starter
|
Freshman User
Joined: Aug 2003
Posts: 40
Likes: 0
From: Southern Md
Brake controller
I have a 2003 F250 HD Series It is prewired for the tow package. I just purchased a draw tite brake controller for it. Plus the factory plugs for itEverything works except the trailer brakes. I have checked the fuses etc. I thought it was the controller at first and purchased another with the same problems. Now I think the problem is that my other half wanted to add another hookup in the bed. Would this maybe causing an open circut?
Thread Starter
|
Freshman User
Joined: Aug 2003
Posts: 40
Likes: 0
From: Southern Md
I don't know if he did or not. I bought another controller and it's doing the same thing. Also the other half never hooked up the other hookup. The trouble shooting on the controller said to check the wire for the brakes and we did and everything looked good. Any help is appreciated Thanks!!!
Hotshot
Joined: Feb 2003
Posts: 11,537
Likes: 27
From: Long Beach, Ms.
First does the trailer work on another truck? Now has the Breakaway switch been tripped? Now test light check the brake circut. Apply 12v to the positive side and connect the test light before the return ground. See if you get a light. No light = no circut, start testing from the powered side.
FTE Leadership Emeritus
Joined: Sep 2000
Posts: 7,298
Likes: 45
From: Southern California
Don't the Superduty's come with the brake relay missing from the prewired brake harness? It seems I've read several posts where new Superduty owner's had to purchase and install the relay from the dealer. Try a search in this forum with the search word 'relay' and see what you come up with. Good luck!
Thread Starter
|
Freshman User
Joined: Aug 2003
Posts: 40
Likes: 0
From: Southern Md
The black power wire has a reading of 12.8v Brake Pedal pushed on the cold side high reads 12.6v going into it. These are for the controller. The back end reads 12.8v with lights. Nothing on electric brake wire (blue). The controller doesn't give any readings. These controllers were bought new but were made up to 91. Could this be a possiblity? Also we have no distribution box on the fender well on either side. Just relays.
Thread Starter
|
Freshman User
Joined: Aug 2003
Posts: 40
Likes: 0
From: Southern Md
The 2003 SD crew doesn't have a distribution box under the hood. Found this out while trying to install a brake controller. Any suggestions on getting power to the brakes? Got all the other lights working just can't get power to the brakes. Has anyone else had this problem.
Trending Topics
Senior User
Joined: Jan 2003
Posts: 171
Likes: 0
From: Sebastopol, CA
One additional thought: check the wiring at the wheels on the trailer. On my '90 fiver I noticed a change in the braking. Amperage seemed to be ok, I was less experienced back then so this statement may be suspect. I crawled under the trailer and found 3 of the 4 wires leading to the brakes had become disconnected. I had had the springs moved from below the axle to above the axle to accommodate a 4x4 tow vehicle. The shop had not seen fit to lengthen the wires and they had pulled loose with suspension movement.
CLPF350
CLPF350
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
3 Best / 3 Worst Parts of Modern Ford Ownership
Brett Foote
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches
Pouria Savadkouei
Every 2026 Ford Engine Explained
Brett Foote
10 Ugly Ford Trucks That We Still Kinda Love
Joe Kucinski
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote