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HELP, Can I Use Wiring Harness for Power


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I have a 2004 1500 CC with trailer package. I thought I could use the constant battery feed on the wiring harness to wire a 12V plug for a cooler to put in the box for vacation. I got a seven wire plug and just wired the ground and the positive (supposedly the constant power) to a 12V plug so I could have a temporary power source (and yes I did double check to see that the plug was wired correctly). The problem is I do not have any power. I checked the manual and the fuse box for a fuse that may need to be inserted for this to work but I was unsuccessful. Any ideas, on what I did wrong. Still scratching my head on this one. Thanks

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I have a 2004 1500 CC with trailer package.  I thought I could use the constant battery feed on the wiring harness to wire a 12V plug for a cooler to put in the box for vacation.  I got a seven wire plug and just wired the ground and the positive (supposedly the constant power) to a 12V plug so I could have a temporary power source (and yes I did double check to see that the plug was wired correctly).  The problem is I do not have any power.  I checked the manual and the fuse box for a fuse that may need to be inserted for this to work but I was unsuccessful.  Any ideas, on what I did wrong.  Still scratching my head on this one.  Thanks

 

 

 

 

makes sure there is a fuse in the spot labeled "stud #1", that is for your trailer wiring power.

 

Disregard the added wiring diagram with a diode, that was for different post.

fusepanel.jpg

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A couple years ago I got a genuine GM accessory from GM Parts Direct that plugs directly into the trailer wiring socket and has a cigarette lighter socket on the other side ... I think I looked a few months ago but did not see it - maybe shoot them an email. At least this would work in a pinch.

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Pretty good bet there is a dummy fuse in the Stud 1 location. You will have to pull it and put in the appropriate maxi fuse (probably bundled with the trailer brake control wire harness). That should fix the problem.

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I have a semi-related question. . .I'm in the process of hooking up extra reverse lights underneath the bumper. The installation instructions with the lights say to connect directly to the battery up front. If I spliced into an always hot lead in the trailer wiring harness, this would substitute just the same correct?

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I have a semi-related question. . .I'm in the process of hooking up extra reverse lights underneath the bumper.  The installation instructions with the lights say to connect directly to the battery up front.  If I spliced into an always hot lead in the trailer wiring harness, this would substitute just the same correct?

 

 

 

correct, but add a fuse if the light's harness doesn't allready have one.

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Thanks for the help, especially BBSilverado for the photos and willieboy for the heads up on the fuse being supplied in the wiring harness. I plugged in the 40A fuse in Stud #1 and the cooler began cooling. Now my family will have cold drinks on the road for the next week. Thanks again

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