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Old 04-09-2010, 03:49 PM   #1
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Prodigy controller wiring

I purchased a prodigy brake controller for my 2008 silverado. I have one in my 2005 silverado that came with an attachment harness-plug and play-no problem. On the 2008 you have to hard wire to the harness in the truck. Well.... I found my wires, connected them properly and I have no voltage on the red/black wire from vehicle which is supossed to power up the black wire to the controller. Looked in owners manual, found fuse for the brake contoller in the under hood box. Checked fuse and I have 12.6 volts. What am I doing wrong or what is wrong???? Please help, thanks
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Old 04-09-2010, 03:55 PM   #2
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Hate to ask the obvious but could it be a switched circuit that requires the key to be in the "run" position to work? That is how it is on mine....

Sometimes the simplest things...

mike
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Old 04-09-2010, 03:59 PM   #3
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Forgot to mention that. I did turn the key on-no voltage. Started truck- no voltage.
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Old 04-10-2010, 07:57 AM   #4
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I did eventually find the problem. On the 2008 Silverado, the red/black wire(supplies voltage to controller) is not hooke up. It is tucked up by the left fender taped to one of the harnesses going into the fuse center. Untaped and connected to the large silver post at the front of the fuse center. VOILA!!!!! power to the controller. Hooked up trailer everything is fine.
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Old 04-10-2010, 08:07 AM   #5
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Glad you got it squared away. Always fun to solve a mystery isn't it?

Wish I'd been of more help...

mike
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Old 04-10-2010, 09:54 AM   #6
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Quote:
Originally Posted by bwoodtx View Post
Untaped and connected to the large silver post at the front of the fuse center.
That is the fused side of the panel, I hope.
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Old 04-10-2010, 11:22 AM   #7
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thanks anyway-sometimes it IS the simple things and we forget them.
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Old 04-10-2010, 02:51 PM   #8
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Here is the step by step instructions that may be helpful to others someday.
Attached Files
File Type: pdf GMT900_Trailer_Brake_Controller_Install.pdf (1.56 MB, 70 views)
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Old 04-12-2010, 10:03 AM   #9
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adonh,

That was most helpful, thanks. I missed one of the red/black wires. am going to correct that now.

thanks again!!!!
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Old 04-26-2010, 11:25 PM   #10
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Having an 2007 Denali, I was sure that the Prodigy was wired for plug and play with the towing package on the truck...the previous (GMT 800's) it was plug and play.
So when I saw the wires running to the fuse box (which is done sloppily to boot) I assume the install shop did it incorrectly, and called them on it.

Guess not!
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