Brake controler
Hotshot
Joined: Jan 2010
Posts: 10,060
Likes: 491
From: Bristol, TN.
Since the trailer brakes are known to be good, the only way the trailer brakes can lock the wheels is if they are getting full amperage. Unless the new brake controller is also bad, which I think it unlikely, there has to be a wiring fault. My though would be the stop lights, which are not modulated, are feeding the brakes.
I know this seems too basic, but if you unplug the new brake controller, do the trailer brakes operate?
Steve
I know this seems too basic, but if you unplug the new brake controller, do the trailer brakes operate?
Steve
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Cargo Master
Joined: Aug 2004
Posts: 3,455
Likes: 8
From: Williams Lake B.C.
Since the trailer brakes are known to be good, the only way the trailer brakes can lock the wheels is if they are getting full amperage. Unless the new brake controller is also bad, which I think it unlikely, there has to be a wiring fault. My though would be the stop lights, which are not modulated, are feeding the brakes.
I know this seems too basic, but if you unplug the new brake controller, do the trailer brakes operate?
Steve
I know this seems too basic, but if you unplug the new brake controller, do the trailer brakes operate?
Steve
Hotshot
Joined: Jan 2010
Posts: 10,060
Likes: 491
From: Bristol, TN.
Although brake controllers seem to be complicated, the basics are not and troubleshooting generally takes no more than 15 minutes once folks get used to it.
Steve
Last edited by RV_Tech; Jun 2, 2012 at 10:25 PM. Reason: expanded answer
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Cargo Master
Joined: Aug 2004
Posts: 3,455
Likes: 8
From: Williams Lake B.C.
It worked fine today when I was loaded , but I went for lunch towing the empty trailer and it locked right up everytime I tapped my truck brakes.
Its embarrasing to pull as the smokes rolling off the tires on a regular basis.
Its embarrasing to pull as the smokes rolling off the tires on a regular basis.
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Cargo Master
Joined: Aug 2004
Posts: 3,455
Likes: 8
From: Williams Lake B.C.
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Hotshot
Joined: Jan 2010
Posts: 10,060
Likes: 491
From: Bristol, TN.
This a basic accelerometer controller and Hayes is certainly a reputable company. Not as well known as Tekonsha, but I have visited the factory and their software designed contracts for a number of controller manufacturers so I doubt there is a problem with the control.
Since the only adjustment is the power wheel, I would hook up my trailer and take it to a parking lot and dial the wheel up and down. When you change the power wheel you should be able to feel a difference in how much initial braking takes place with the trailer brakes. Dialed all the way up, the brakes should take hold pronto. Dialed down should be much smoother.
By your description, I would expect the controller is set for a much heavier trailer. For example, on my Hayes G2, which has a digital screen, I set the initial action according to the weight of my trailer in relation to the weight of my truck, so if I set it all the way up, the trailer comes on very hard.
Steve
Since the only adjustment is the power wheel, I would hook up my trailer and take it to a parking lot and dial the wheel up and down. When you change the power wheel you should be able to feel a difference in how much initial braking takes place with the trailer brakes. Dialed all the way up, the brakes should take hold pronto. Dialed down should be much smoother.
By your description, I would expect the controller is set for a much heavier trailer. For example, on my Hayes G2, which has a digital screen, I set the initial action according to the weight of my trailer in relation to the weight of my truck, so if I set it all the way up, the trailer comes on very hard.
Steve
Hotshot
Joined: Jan 2010
Posts: 10,060
Likes: 491
From: Bristol, TN.
So the controller setting does nothing? Sorry, I can't recall, is this with your 02 350? And you are connecting your controller using the factory plug?
Steve
Steve
Last edited by RV_Tech; Jun 3, 2012 at 11:17 AM. Reason: added questions
Hotshot
Joined: Jan 2010
Posts: 10,060
Likes: 491
From: Bristol, TN.
Try this. Locate the brake pin on your seven pin and with no lights, etc. turned on, have someone slowly work the manual slide on the controller while you watch the meter. Doing this overrides any other controller function. Does the voltage slowly rise at the pin? This should tell you if you brake pin wiring is correct.
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Cargo Master
Joined: Aug 2004
Posts: 3,455
Likes: 8
From: Williams Lake B.C.
It has been wired in.
The truck is the 99 dually.
The gain control works , it really slams on if I turn it up.
Its not the trailer as it works well when I pull it with my 02
The truck is the 99 dually.
The gain control works , it really slams on if I turn it up.
Its not the trailer as it works well when I pull it with my 02
Hotshot
Joined: Jan 2010
Posts: 10,060
Likes: 491
From: Bristol, TN.
All 1999 and later Ford vehicles without the trailer wiring package:
• The red controller wire must be connected to the light green wire of the brake stop lamp through a 20-amp inline fuse.
• Failure to install a 20-amp inline fuse can destroy the controller and void the manufacturer's warranty.
Steve
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