Making a Trailer Plug Pin Hot - Ford Powerstroke Diesel Forum
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post #1 of 19 Old 12-10-2010, 06:52 AM Thread Starter
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Making a Trailer Plug Pin Hot

I have a question and I hope someone has an answer.

On my GMC there was a trailer plug pin that was always hot. This made it possible for me to run the cargo lights and a water pump in my work trailer without having to turn on the truck. A friend of mine says his first generation Super Duty has that same hot pin. He is in the Parts Department and one of the Techs a couple of years ago put in a fuse or relay to make this possible. But unfortunately it was not him and he does not know where it when. The Tech who did it does not yet know if this could be done to the 2011s.

Does anyone know how to make that pin hot without having the truck on?

THANKS in advance for your help.... I kind of need this in a big way.

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post #2 of 19 Old 12-10-2010, 07:02 AM
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There should be an all time hot in your trailerplug. If not just get some 10gauge wire and run it from the battery to the back of the truck.


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post #3 of 19 Old 12-10-2010, 07:08 AM
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The pin exists. Just put the fuse in the fuse block for it

Email: Dave@powerstroke.org
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post #4 of 19 Old 12-10-2010, 12:21 PM Thread Starter
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Quote:
Originally Posted by Dave View Post
The pin exists. Just put the fuse in the fuse block for it
That is what I understand as well, but I just do not know which place. All the trailer points are taken, in the power block under the hood. There are several that are not listed with a description. A number would be great!

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post #5 of 19 Old 12-10-2010, 12:42 PM
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Should be fuse 90 under the hood

http://www.motorcraftservice.com/pub.../11f23og3e.pdf

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post #6 of 19 Old 12-10-2010, 04:32 PM
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Good info, I also need a hot pin to run a fuel transfer pump. I now have my pump hooked to my lights so when I need to use the pump I need to turn the lights on.
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post #7 of 19 Old 12-12-2010, 07:43 AM Thread Starter
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Quote:
Originally Posted by Dave View Post
Thanks... I will look today.

That link does not work for me, say it times out or I do not have permission.

What size fuse is required for that circuit?


Quote:
Originally Posted by jimchris View Post
Good info, I also need a hot pin to run a fuel transfer pump. I now have my pump hooked to my lights so when I need to use the pump I need to turn the lights on.
That is not what I wanted to do either and having to turn the truck on every time I needed to us my pump or even to have the cargo light was going to be a PITA.

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post #8 of 19 Old 12-12-2010, 08:08 AM Thread Starter
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Well, fuse #90 is not it. I have one in place already that is in tact.

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post #9 of 19 Old 12-12-2010, 10:11 AM
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I have an '07 I have always wanted to know this also, its a pain in the hiney to start the truck just for trailer lights. For the transfer pump we always just leave the truck run, it pumps faster anyways.
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post #10 of 19 Old 12-13-2010, 04:19 PM Thread Starter
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OK, I think I have the answer. I did not yet try it... I am going to try and do it tonight.

In the Battery Junction Box you will have to jump Relay #102 that is the Trailer Tow Relay Battery Charge. Pin number 3 & 5 is where the jump will have to go.

I am going to post some pictures when I do it.

Hope this is it and I hope it helps those that need power without having to turn the truck on.

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