Ive got a 33000gvw international single axle dump truck with air. I have a 6 ton trailer and i just bought a 12 ton trailer and they both have electric brakes. A couple of months ago i took the truck and trailer to the trailr manufacture to wire the truck for air over electrick brake controller. I hav a tekonasha P3 break controler for it but it keeps reading WARNING CURRENT OVERLOAD NO TRAILER BREAKS. All the lights work properly on both trailers i just dont have trailer breaks? I got underr the truck and looked at the wireing and theres only 4 wires going back to the electrical trailer conection on the truck end. They have the black wire hooked to 12v power supply, white wire hooked to ground, blue going back to the hook up, and red going to a air controle pressure regulator behind the seat (these are all the wires comeing out of the break contoller). Any ideas of wear they went wrong or any advise would be greatly appriciated!
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Trailer brake hook up help.
- Thread starter jca57jd
- Start date
Does it do it on both trailers?
I did have a similar issue that ended up being a bad ground thru the hitch. Make sure your hitch isnt rusted up. Around here the mag chloride use in the winter makes bare metal rust quicker than normal and my pintle gets a coat of rust if it isnt used in a few days.
I did have a similar issue that ended up being a bad ground thru the hitch. Make sure your hitch isnt rusted up. Around here the mag chloride use in the winter makes bare metal rust quicker than normal and my pintle gets a coat of rust if it isnt used in a few days.
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Muffler Bearing
Senior Member
"current overload" sounds like a short to ground, maybe that controller is smart enough to protect itself. Best thing is to make a hot lead and test the pins one at a time and find out if you can apply the brakes. Start there and you can isolate it from the other 5 pins. Once you know your brakes are functional you can sort out the wiring. Good luck
Muffler Bearing
Senior Member
Thanks, I'm suddenly glad the company logo isn't showing! Electrical problems are so hard to diagnose without a test light in my hand.
Thats Funny! When I ran a ready mix plant. We did some things that wouldnt always look "safe" in a picture, but we always did our best to be safe.
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Orchard Ex
Super Moderator
I think that the P3 detects shorts vs. current overload and will read out "short". Could you have wired the brake wire pin to the breakaway battery pin on the trailer making it try to charge through the brake controller?
That is possible ill have to go look at how he has it wired again. I use this same brake controller in three different vehicles to pull the same trailers and My primary truck, this dump truck is the only dang one that decides to give me problems
ASPHALT04
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I have had similar grounding issues through the hitch and ended up rewiring all my grounds so that trailers are grounded directly through the trailer plugs. It has eliminated most of my electric brake issues.