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Old 02-21-2016, 06:38 PM   #1
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Tow cable replaced and lost 12v power

Newbie here. Picked up our 26dbh and while turning into our driveway the cable got stuck on something and tore. I just installed a replacement and all of the lights, turn signals work but I don't seem to be getting any 12v power. As I said I am new to this so I apologize if this is a dumb question, but even if the battery is just about dead shouldn't the act of plugging the 7 pin into my car provide me with power to interior lights, power tongue jack, etc?
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Old 02-21-2016, 06:45 PM   #2
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Between the battery and your unit there should be one of these.



If so press the little black button.
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Old 02-21-2016, 07:00 PM   #3
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I found that and pressed the button and nothing changed.
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Old 02-21-2016, 07:20 PM   #4
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Did you check the fuse under the hood yet?

Does the plug in have power?
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Old 02-21-2016, 07:21 PM   #5
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Is this what you are referring to? There are 2 right next to each other and the black wire comes out of the box with the pin wiring and into the one on the right.
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Old 02-21-2016, 07:36 PM   #6
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Check your fuses on the main electrical panel. The short could have blown the fuse. They will the the high amp fuses most likely 40 amp.
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Old 02-21-2016, 07:47 PM   #7
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Do you have 12 volts at the jack on your truck? I think Chevys are hot all the time and Ford and Dodge are on/off with key.
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Old 02-21-2016, 08:13 PM   #8
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The Chevy's/GMC I've owned you had to install the 40 amp fuse in the EPC under the hood. GM puts a dummy plug in the slot for the 12vdc to trailer. Two of the trucks I had to connect a wire to the EPC stud that was taped to the existing wire harness....


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Old 02-21-2016, 08:17 PM   #9
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Check the fuses on your tow vehicle.
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Old 02-22-2016, 05:38 PM   #10
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The Chevy's/GMC I've owned you had to install the 40 amp fuse in the EPC under the hood. GM puts a dummy plug in the slot for the 12vdc to trailer. Two of the trucks I had to connect a wire to the EPC stud that was taped to the existing wire harness....


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What does EPC mean? Also, where is the slot with the dummy plug?
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Old 02-22-2016, 05:42 PM   #11
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Check your manual and look for trailer 12V aux power. If you had power before the incident, there will be a fuse ( possible blown) If you are not sure, there could be a plug where the fuse needs to go. Also note that trailer lights are on separate fuses from the TV if you ever have running light issues.
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Old 02-22-2016, 06:02 PM   #12
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Not sure what vehicle you have since its not in your profile, but here is some info from ETrailer.com regarding brake control and trailer power for a 2009 chevy pu. The important info is at the 2:25 mark.
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Old 02-22-2016, 06:24 PM   #13
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I didn't see an answer if you have 12 volts at the 7 pin receptacle on your bumper. If you have 12 v there the problem is in the trailer; no 12v, the 40 amp fuse in the black box next to your truck battery is probably blown
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Old 02-22-2016, 07:08 PM   #14
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What does EPC mean? Also, where is the slot with the dummy plug?
EPC = electrical power center
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Old 02-22-2016, 11:06 PM   #15
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EPC=Electrical Power Center
Located under hood above LF wheel.
Black Fuse/Relay box.
Dummy plug is located towards front of EPC. Reference owners manual for exact location.


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Old 02-23-2016, 04:24 PM   #16
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Sorry for such a late response...busy start to the week! I just pulled the fuse in my tv and sure enough it's blown. I will replace tonight and see if that's what did it.
My guess is when the cable got caught it blew the fuse in my truck.
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Old 02-23-2016, 05:18 PM   #17
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Originally Posted by Tngahan View Post
Sorry for such a late response...busy start to the week! I just pulled the fuse in my tv and sure enough it's blown. I will replace tonight and see if that's what did it.
My guess is when the cable got caught it blew the fuse in my truck.
Please let us know if that's what it was....
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Old 02-23-2016, 07:18 PM   #18
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That was it! I have power again. Thanks everyone for the suggestions...this forum is great!
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Old 02-23-2016, 07:30 PM   #19
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That was it! I have power again. Thanks everyone for the suggestions...this forum is great!
Thanks for reporting your solution from the forum members. We like solutions!
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Old 02-23-2016, 09:37 PM   #20
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Originally Posted by Ford Idaho View Post
Between the battery and your unit there should be one of these.



If so press the little black button.
Don't remember seeing one of these. Where is it?
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