Brakes drag when pulling trailer... - Ford Powerstroke Diesel Forum
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Old 02-06-2014, 06:12 AM
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Brakes drag when pulling trailer...

F350, 4x4, 180k
Last month installed all new brake rotors/pads. Inspected calipers. Etc...
Only known issues in this area in ABS light on the dash (ie most likely wheel sensor)

Alright, very strange problem. My truck drives and stops great under normal daily driving. Recently I hooked up a nice/new car hauler trailer with a pig tail connector. Everything seemed to be working fine, except the truck seemed to a bit sluggish. Drove it roughly 10 miles empty to pick up a vehicle. After stopping and getting out, I could smell the driver side rear wheel. Smelled like the brake was cooking! Threw a little snow on it and it sizzled right off. Wtf. Trailer brakes are not dragging (at least I dont believe so). and no other wheel was producing a smell. Or super hot. Disconnect the trailer and it no longer drags. Very strange. Anyone have an idea before I take it to the damn dealer??
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Old 02-06-2014, 12:08 PM
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Quote:
Originally Posted by Rik6.0 View Post
F350, 4x4, 180k
Last month installed all new brake rotors/pads. Inspected calipers. Etc...
Only known issues in this area in ABS light on the dash (ie most likely wheel sensor)

Alright, very strange problem. My truck drives and stops great under normal daily driving. Recently I hooked up a nice/new car hauler trailer with a pig tail connector. Everything seemed to be working fine, except the truck seemed to a bit sluggish. Drove it roughly 10 miles empty to pick up a vehicle. After stopping and getting out, I could smell the driver side rear wheel. Smelled like the brake was cooking! Threw a little snow on it and it sizzled right off. Wtf. Trailer brakes are not dragging (at least I dont believe so). and no other wheel was producing a smell. Or super hot. Disconnect the trailer and it no longer drags. Very strange. Anyone have an idea before I take it to the damn dealer??
It sounds to me there may be a wiring issue with the trailer. What is the Pin Connector on the truck (4,5 or 7 Pin)? Does your vehicle have a factory brake controller? Is the Trailer new, used? Have you used other trailers before without issue?

If you have used other trailers before, I would guess it is the trailer wiring. Something is causing a short between the trailer wiring to the truck. Make sure the ball is free of rust in addition to the hitch on the trailer.

Last edited by rick1067; 02-06-2014 at 12:11 PM.
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Old 02-06-2014, 01:08 PM
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The trailer would have zero affect on the left rear truck brake. It is quite possible you have a dragging e-brake or a sticky disc caliper. No matter what, the trailer will not cause the one brake to drag. Perhaps with the extra load of the trailer you are finally using your rear brakes to stop and the other rear brake is doing nothing.

If it is the trailer brake that is grabbing, it is quite possible the electric brakes are being activated due to an incorrect wiring for the plug.
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Old 02-06-2014, 02:18 PM
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Your ABS light is on because of something thats happening in the brake system. The reluctor wheel(sensor thats on each wheel) maybe be malfunctioning and causing the truck to think that the ABS needs activated. The trailer brakes being disconnected or connected liek already stated has no affect on the truck brakes. I would not drive the truck. If that wheel bearing grease gets hot enough, it will go bye bye and then the wheel bearing will lock up.
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