"Trailer Fault" under medium to heavy braking?? - Ford Powerstroke Diesel Forum
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Old 06-20-2011, 07:46 AM
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Question "Trailer Fault" under medium to heavy braking??

I've got the factory brake controller on my 2006 CC Lariat.

Has anyone here ever had the "trailer fault" indication come up during medium to heavy braking while towing? Other than the actual indication and beep, there is no other indication that anything is wrong and the trailer brakes continue to work just fine.

Any input would be greatly appreciated.

Thanks,
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Old 06-20-2011, 07:49 AM
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Make sure your trailer plug is fully seated
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Old 06-20-2011, 11:28 AM
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Yes i have the same problem. Ford told me this is a common problem. They said run a ground from the trailer to the bumper. have not tried this yet.
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Old 06-20-2011, 07:01 PM
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Mine did that until i took a grinder with a wire wheel and removed the rust off the trailer ball and inside the trailer coupling. No more fault.
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Old 06-21-2011, 06:25 AM
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Thanks for the advice. I'll check the grounding between the truck and trailer this weekend.

Last edited by DarrenMc32; 06-21-2011 at 06:29 AM.
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Old 06-21-2011, 06:28 AM
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Quote:
Originally Posted by 14mins View Post
Mine did that until i took a grinder with a wire wheel and removed the rust off the trailer ball and inside the trailer coupling. No more fault.
Yep. Same here.
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Old 06-21-2011, 06:29 AM
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My trailer does that because it sux (technical term). lol. Using other peoples boxes etc, no issues.
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Old 06-21-2011, 02:17 PM
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Check your 7pin plug on the truck, take it apart and check for corrosion. My truck was doing the same thing and i found that only the trailer brake pin was corroded-i cleaned all the green crap off the best i could and filled the plug with die electric grease havnt had a problem sense.
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