12 Valve 2nd Gen Dodge Cummins 94-98 Discussion of 12 Valve 5.9 Liter Dodge Cummins Diesels with P7100 Injection Pumps

trailer brakes?

Old Apr 15, 2009 | 08:27 AM
  #1  
BAD ASS RAM's Avatar
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From: clifton,tn
Default trailer brakes?

i need to haul a backhoe from where i work to my house so i want to make sure my trailer brakes are working.they where in the truck when i got it,when you hit the brakes the unit does not light up.it wont when you silde the thing on the front.how are they suppose to be hooked up?and is there any way of testing them?will they work if the lights's not coming on?sorry for the long post,i need help,don't wanna be in a ditch!
 
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Old Apr 15, 2009 | 09:40 AM
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From: LUBBOCK TEXAS
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I WOULD FIRST LOOK BEHIND IT TO SEE IF ITS PLUGGED INTO THE HARNESS IF NOT THERES YOUR PROBLEM IF SO FOLLOW THE WIRES
 
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Old Apr 15, 2009 | 12:26 PM
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mines the same way... dunno if it works or not
 
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Old Apr 15, 2009 | 12:33 PM
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IM TRYING TO REMEMBER THERE IS A WAY TO MAGNET TEST IT ON YOUR BUMPER HITCH BUT ITS NOT COMING TO ME I WOULD GET A 12V TEST LIGHT AND HAVE SOMEONE SITTING INSIDE AND GO THROUGH THE MOTIONS WITH LIGHTS BLINKERS BRAKES ETC... AND YOU WILL SEE IF ITS AT LEAST GETTING TO THE REAR HARNESS IF SO THE TRAILER IS NEXT TO TEST
 
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Old Apr 15, 2009 | 02:25 PM
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hook to your trailer and turn the controller up hit the brakes if they lock on the trailer they work.
 
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Old Apr 15, 2009 | 02:49 PM
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my controler doesn't show signs of working unless it is pluged into a trailer. don't know why it is that way, but it is. also all you need to do is just plug into the trailer, no need to hook up if you are just checkin things out. you can also purchase testers for 4,5,6,and 7 pin plugs, they shouldn't be that expensive, but hookin to the trailer is cheaper......
 
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Old Apr 15, 2009 | 05:50 PM
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From: New Albany Indiana
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most brake controllers do nothing unless there is a trailer plugged in to the truck and at times if the trailer is not working right you may think your controller is bad. first i would check the plug with a simple 12v test light. check the turn signals, running lights and brakes if all checks good have some one adjust the break controller while you have the test light on the plug still. the test light should dim as you turn the controller down and get brighter as it is turned up. you can also do all the test with a voltage meter. i can easily figure it out if i was there just hard for me to explain how to do it, hopefully this helps. if you have anymore questions you can message me and i will help as much as i can on here.
 
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Old Apr 16, 2009 | 06:20 AM
  #8  
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From: clifton,tn
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i checked it out,i decided to do the first and easiest test,i hooked it up.not working.but i just took one look to see what happened.they cut the factory cable that runs th the plug on the hitch to put a small trailer light plug on it.they even got my blinkers backwards.all i hvve to do is wire it back where they cut it,and get me a adapter for the small plug.
 
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