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I just purchased a Prodigy brake controller and wireing harness for my 03 2500 HD. I cannot find the harness under the dash. I have the 6-7 pin trailer hook-up in the bumper. Has anyone hard-wired one of these in, or know where the plug is hidden under the dash?

Thanks,
 

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If you have the tow package, you need to look for a BLUE four pin socket under the dash. It's visible from the floor looking up, next to the larger white connector on the left side. Mine was a little hard to reach due to the position of other wire bundles that were running over the top of it. The Prodigy should be a plug and play solution. The hardest part for me was finding a place to mount the controller.

--Mark
 

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It can be difficult to find if you have never seen it before, and there is no one there to point it out to you. I was laying on my back all contorted and twisted up with the drivers seat pushed all the way back, trying to see up in the dash for a good five minutes or so before I found it. It was way up in there, tucked up behind a main wire bundle.
 

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I wonder if he found it. It can be a pain to find but it is there. And every year they seem to move it a bit :(
 

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The steering column bundle ran right in front of mine but there is enough slack to move it to the side. BTW, my truck didn't come with the tow package. I think pretty much all the trucks come with this and it is part of the wire loom standard. The tow package, as far as I can tell, just gives you the 7 pin vs the 4 pin at the bumper, the hitch, and the pig tail for under the dash(put in the gove box at the factory). The connector is a large, oversized if you ask me, blue plug with 4 male connetors sticking out of its end.
Edit: Here are some pics.
 

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Technology Handyman
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In the fords you need a pig tail to hook up the controler, do you need one in the Ram, If so where can I get one?
 

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The dealer will have it if its not in your glove compartment.
 

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Ya, mine was in the glove box on the new truck... But I bought the prodigy to Dodge pre-made pigtail for $10 at Camping World. I didn't want to deal with any wire splices on something so important... and besides, the pre-made one is $10. That's cheap

Here's the link on the Manufacturers site... and trust me, it says to '04... but it's the same through at least '06. Mine was an exact fit.

http://www.tekonsha.com/bch3020.html
 

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The pigtails have been the same since 1998, maybe earlier. I put mine on my controller in 98 and haven't changed it since. Its went in my 2000, 2001, 2003 and now my 2005
 

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hey guys, new guy here,
i have a 2005 ram 1500 4x4 and went looking for the plug, it is not there, i do not believe i have the towing package (bought it used) there was no prev. wiring or hitch. now what do i do? All i saw up the was a green conector.
 

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ok i have a question.

my truck did not come with the tow package so i added the 7 pin and i have the blue wire for the brake controller not plugged into anything.

i went outside and verified that i have the connector there as shown in the picture (thanks for posting that i never would have know what i was to look for).

question is:

what do i do with the blue wire from the 7 pin connector i installed?
 

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Not sure if I understand your question. Where is the loose blue wire that you're wondering about? In the cab or under the back bumper? Usually the blue wire is the brake control wire.

I wonder if this link helps. It has color coded diagrams on trailer hitch wiring.

http://www.rverscorner.com/wiring/7pole.html
 

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i called a parts dept a local dodge and they told me that if i have the 4 pin (which i do) then all i need is the 4 plug to 7 pin adapter that costs $25.

not knowing this (another delearship told/sold me) the entire 7 pin wire harness $85 or something like that.

so the blue wire i was referring to was the one that was part of that assembly which is required if you do not have the 4 pin. the 4 pin is already wired (which i did not know) for brakes.

so all in all i bought the wrong part and i have an extra wire in the cab that i am going to cut off.
 

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The 4 pin is NOT wired for brakes. The 4 pin has a ground, left turn, right turn and clearance lights. The 7 pin adds the live power to the trailer, electric brakes and backup lights.
 
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