Brake controller wiring help
Thread Starter
|
Tuned
Joined: Feb 2007
Posts: 490
Likes: 3
Brake controller wiring help
I posted what I thought might be the brake controller plug, but apparently its not. I went to Uhaul to see about buying the controller and they thing the factory one is gone. The four wires where it should be were cut and taped together. The guy said they were the right color but were all dead, no power coming through any of them according to his little test light. They want $100 to hardwire one in.
He checked the fuses, but are there any relays that could be bad? What should I do/check to get this thing working?
I pick up my travel trailer next Tuesday and really need to get this working before then. My mechanic can't get me in before Thursday, so if I can't get this done I'm stuck paying Uhaul $100 instead of just using what should be the factory harness.
Help!
oh, here's the picture of what I thought might be the plug:
https://www.ford-trucks.com/forums/9...ller-plug.html
He checked the fuses, but are there any relays that could be bad? What should I do/check to get this thing working?
I pick up my travel trailer next Tuesday and really need to get this working before then. My mechanic can't get me in before Thursday, so if I can't get this done I'm stuck paying Uhaul $100 instead of just using what should be the factory harness.
Help!
oh, here's the picture of what I thought might be the plug:
https://www.ford-trucks.com/forums/9...ller-plug.html
Cargo Master
Joined: Mar 2008
Posts: 2,975
Likes: 19
From: Archdale,N.C.
I couldn't see the plug in your picture,but the four same colored wires as the brake controller wires that has no power to either of them are"not" the brake controller wires,trust me I know for sure.The wires that have no power were put there from Ford as extra wires for whatever.The brake controller plug is a square grey plug that is on the inside of the opening to the right of your picture.
Senior User
Joined: Feb 2008
Posts: 303
Likes: 0
From: Central Washington State
I couldn't see the plug in your picture,but the four same colored wires as the brake controller wires that has no power to either of them are"not" the brake controller wires,trust me I know for sure.The wires that have no power were put there from Ford as extra wires for whatever.The brake controller plug is a square grey plug that is on the inside of the opening to the right of your picture.
IMHO anybody who has spent any time under the dash of these trucks professionally (like the U-Haul guy), should know what those wires are for. I think you would be paying $100 for him to learn. I would go elsewhere. The people on this site will put you where you need to be and it won't cost you a cent.
Super Moderator
Joined: May 2004
Posts: 29,380
Likes: 118
From: Central Coast of CA
Help!
oh, here's the picture of what I thought might be the plug:
https://www.ford-trucks.com/forums/9...ller-plug.html
oh, here's the picture of what I thought might be the plug:
https://www.ford-trucks.com/forums/9...ller-plug.html
The grey plug is the factory harness. The brown plug that is plugged into the grey plug is the Ford specific pigtail coming from a Prodigy brake controller, plugging into the factory harness.
This picture was taken from the drivers side looking to the center of the dash, just under the climate controls. The knee panel under the steering wheel was removed to get this view.
Stewart
Senior User
Joined: Apr 2009
Posts: 395
Likes: 1
From: Texas
and one more -grey factory plug connected to brown controller plug. (far right)
https://www.ford-trucks.com/user_gallery/sizeimage.php?photoid=229223&.jpg=
https://www.ford-trucks.com/user_gallery/sizeimage.php?photoid=229223&.jpg=
Go Bills !
Joined: Jan 2008
Posts: 2,778
Likes: 65
From: Buffalo, NY
Yea, I don't see his plug either in his picture. A touch different. Must be a 99? Mine is were steward's finger is pointing. Something different in his truck's hole like a black square plug box or something.
Eeek.. is that rust ? That truck go for a swim?
Eeek.. is that rust ? That truck go for a swim?
Thread Starter
|
Tuned
Joined: Feb 2007
Posts: 490
Likes: 3
There's no plug back in that hole. The only wires either go to the stereo, the 4wd switch, or that large black box. I can't see any plugs that aren't used other than that round thing.
Trending Topics
Postmaster
Joined: Oct 2005
Posts: 2,956
Likes: 0
From: Northeast TN
My early 99 has the plug just like Stewart's.
I was looking for the wiring diagrams (I used to have saved). I can't seem to find them now...
I was looking for the wiring diagrams (I used to have saved). I can't seem to find them now...
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
10 Most Surprising 2026 Ford Truck Features!
Joe Kucinski
Top 10 Ford Trucks Coming to Mecum Indy 2026
Brett Foote
5 Best / 5 Worst Ford Truck Wheels of All Time
Joe Kucinski
Cargo Master
Joined: Jun 2003
Posts: 3,292
Likes: 6
From: Ardenvoir, Washington
The plug should be there in thru that brace dash hole, to the right after removing the dash cover under steering wheel ..It is really tuck in there.. Ford did not make it easy to get at.... !!
Thread Starter
|
Tuned
Joined: Feb 2007
Posts: 490
Likes: 3
If its in there its on the passenger side. I've done everything but take the stereo out and try to get to if from the top.
Go Bills !
Joined: Jan 2008
Posts: 2,778
Likes: 65
From: Buffalo, NY
I wonder if it is in the same hole Just under that black box. Can you slid out that box and look around? It appears it is clipped in on the bottom..
Behind the radio? Wierd. So many pics of were Stewards show. But yours is not..
Behind the radio? Wierd. So many pics of were Stewards show. But yours is not..
Thread Starter
|
Tuned
Joined: Feb 2007
Posts: 490
Likes: 3
Ok, I think the previous owner must have cut the plug out for some reason. I unclipped the big black doo-dad and found some loose wires that come out of the same harness.
The red one gets power when I push the brake pedal, so there's a postive sign. The others don't have power at all, though. The blue and white both seem dead, regardless of key position. Should the blue one be the wire the brake controller plugs into that leads to the pin at the rear bumper? I know white should be ground, just can't figure out why there's no 12v source there unless I just couldn't fish it out. Easy to wire that up, though.
There's also a fat red one that's also dead.
Now that I've at least got a lead to the brake system, how tough is wiring in a brake controller to the system? I hate to pay $100 to have it done but my regular mech can't get me in until 2 days after I need it. Unfortunately due to work demands I'll either have to work on it at night or the morning before I pick up the trailer.
Here's some photos of the 7 pin connection at the back, it appears to be the factory one.
The red one gets power when I push the brake pedal, so there's a postive sign. The others don't have power at all, though. The blue and white both seem dead, regardless of key position. Should the blue one be the wire the brake controller plugs into that leads to the pin at the rear bumper? I know white should be ground, just can't figure out why there's no 12v source there unless I just couldn't fish it out. Easy to wire that up, though.
There's also a fat red one that's also dead.
Now that I've at least got a lead to the brake system, how tough is wiring in a brake controller to the system? I hate to pay $100 to have it done but my regular mech can't get me in until 2 days after I need it. Unfortunately due to work demands I'll either have to work on it at night or the morning before I pick up the trailer.
Here's some photos of the 7 pin connection at the back, it appears to be the factory one.
Go Bills !
Joined: Jan 2008
Posts: 2,778
Likes: 65
From: Buffalo, NY
This Help? Tough to debug someone else wire.. Wish i could drive up and lend a hand.
Brake switch wire seems good.
Big blue goes to the back. White goes to white for grounding.
Big red gets 12v to shift to the back by brake box via Blue (big red controlled by relay)
and i think there is one more. 12v constant. not sure of the color.(orange?) SO the brake box displays all the time.
Relay and fuses are up in engine bay next to the master cylinder.
Not to sure. Been a while since i have worked on it. (see wire6.pdf)
Brake switch wire seems good.
Big blue goes to the back. White goes to white for grounding.
Big red gets 12v to shift to the back by brake box via Blue (big red controlled by relay)
and i think there is one more. 12v constant. not sure of the color.(orange?) SO the brake box displays all the time.
Relay and fuses are up in engine bay next to the master cylinder.
Not to sure. Been a while since i have worked on it. (see wire6.pdf)
Thread Starter
|
Tuned
Joined: Feb 2007
Posts: 490
Likes: 3
This Help? Tough to debug someone else wire.. Wish i could drive up and lend a hand.
Brake switch wire seems good.
Big blue goes to the back. White goes to white for grounding.
Big red gets 12v to shift to the back by brake box via Blue (big red controlled by relay)
and i think there is one more. 12v constant. not sure of the color.(orange?) SO the brake box displays all the time.
Relay and fuses are up in engine bay next to the master cylinder.
Not to sure. Been a while since i have worked on it. (see wire6.pdf)
Brake switch wire seems good.
Big blue goes to the back. White goes to white for grounding.
Big red gets 12v to shift to the back by brake box via Blue (big red controlled by relay)
and i think there is one more. 12v constant. not sure of the color.(orange?) SO the brake box displays all the time.
Relay and fuses are up in engine bay next to the master cylinder.
Not to sure. Been a while since i have worked on it. (see wire6.pdf)
Thread
Thread Starter
Forum
Replies
Last Post
kittmaster
Audio & Video Systems, Navigation, Satellite Radio & Mobile Electronics
0
Nov 16, 2015 10:45 AM
metriccar
1987 - 1996 F150 & Larger F-Series Trucks
0
Apr 25, 2012 11:05 PM
Nightrain
All Things Towing
0
Feb 3, 2008 11:41 AM
