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Old 09-01-2008, 04:12 PM   #57
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If you have antilock brakes you must have one of those. I havwe always been told.
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Old 09-01-2008, 04:12 PM   #58
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RBolton is right on the connection process. I looked at wiring diagram of the veh you have and you do have separate circuits for brake and turn lights thats why you need the convertor. If hubby has a test light wiring this in will be a breeze. Hit turn signal and hit each pin in the 7 way till you find the one flashing. Cut the wire and insert the corresponding wires from convertor. You can bypass the running light circuit if the running lights are working correctly now.
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Old 09-01-2008, 04:22 PM   #59
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I wish you guys where closer I would shoot over and help you. It is pretty simple just intimidating
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Old 09-01-2008, 05:52 PM   #60
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and the fun continues

mustang - I sure wish you were close too!

I am including some pictures this time.

As per the instructions on the Prodigy controller he wired the blue brake line into the 7 way plug on the tow vehicle. He would be all set to just plug this into the trailer but for the original problem - the GMC uses a separate line for the brake (stop) light and the AS does not.

If we add the converter as suggested the tow vehicle side is a 5 flat plug which means brake, r turn, l turn, running, and ground so what do you do with the brake blue line??

Right now he has the AS wired as follows:
r turn/stop
l turn/stop
clearance
back up
ground
electric brakes

Do they make a 6 flat converter?
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Old 09-01-2008, 05:56 PM   #61
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RBoulton

After taking the rear lights off of the fuse panel everything began working properly. If we can just figure the hook up out we should be good to go.
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Old 09-01-2008, 06:04 PM   #62
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The blue brake line is totaly seperate function
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Old 09-01-2008, 06:05 PM   #63
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it has nothing too do with the brake lights
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Old 09-01-2008, 06:09 PM   #64
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wire the convertor in for the lights and run the blue brake wire to where the brakes for trailer is wired. The electric brakes have nothing to do with the brake lights as far as making them come on,so if the prodigy is already wired in then you need not worry about that till time to adjust it for too much or too little trailer brakes. After you wire the convertor in you should have your lights.
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Old 09-01-2008, 06:13 PM   #65
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69AmbassFl - we sort of have two issues here: if we hook it up as is, the brake lights will not operate properly.

But if we add the converter which would solve the stop light dilemma we would not have anywhere to connect the brake line since the converter is only a four prong.
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Old 09-01-2008, 06:16 PM   #66
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The electric brakes on the trailer side are wired to the 7 prong at the center.
The Prodigy is wired to the vehicle plug as shown in the pix.


Now, I am flying blind here - could we rewire our tow vehicle with a flat 5 prong, add a 5 to 4 adapter, then add the flat four converter?
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Old 09-01-2008, 06:24 PM   #67
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If you hook up the convertor to the 7 way plug on the van, the turn signals and the brake lights will work off the same wires down both sides of the trailer. The wires for the trailer are there, so the 5 wire side of the convertor is actually hooked tto the vans wiring and the 4 wire side is connected into the 7 way where your turn signal wires already are. you really don't have to worry about the running light wire since it is already working and not on the same circuit.
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Old 09-01-2008, 06:30 PM   #68
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do you have the Prodigy wired to the same pin in the plug on the van side as is the trailer? as i said before the electric brakes and the brake lights are on a totally different circuit. As far as the convertor goes you only have to mess with 2 wires at the 7 way on van( Both stop/turns ) cut those 2 and install convertor, then pull a tail light out and find the brake light wire and tie into that and it should work.
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Old 09-01-2008, 06:42 PM   #69
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Hubby (understandably) says he has a headache and doesn't want to discuss this anymore today.

He is going to the trailer place tomorrow and I'll have him read this before he does.

But I have one more question:
On e-trailer they have the converter. It has just wires to tie into on the vehicle side. The trailer side ends with the four way plug - could we not just cut that off and wire into the 7 way that we have?

That way the light wires would go through the converter, the brake wire bypasses the converter and all wires go into the 7 way. ?
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Old 09-01-2008, 06:46 PM   #70
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That is correct, sorry I thought we had mentioned cutting it off and installing into the 7 way
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