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Old 06-26-2013, 11:14 AM   #1
okcscott's Avatar
Join Date: Mar 2013
Posts: 147
wiring harness thru firewall?

Made several small wiring harnesses, (12v aux, power locks, and power for alarm) Is there any place to pull thru the firewall on the pass side without drilling a hole? I did see a large rubber boot with a wiring harness pulled thru with both sides taped?? Thanks also photos might help. Trying to do this right


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Old 06-26-2013, 11:43 AM   #2
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Location: Aurora, CO
Posts: 1,377
There's a hole with some insulation you can push through. I don't have my camera handy but I'll try to explain.

If you open the passenger side door you can see on the side of the dash there is a panel that is right up against the door when it closes. If you carefully wedge a knife in the seam you can pry it out. It's plastic and easy to damage so take your time and be careful you can avoid damaging it. Once you get the first couple of clips to pop loose you can get a finger in there and pull the panel off. It's only clips, no screws.

Once you have that open you can see on the firewall a hole in the aluminum bracket maybe 1/2 to 3/4 of an inch in diameter. It will be filled with what looks like expanding foam insulation.

You can straighten up a coat hanger and push it through the insulation.

With the hood open you will be able to see the end of the coat hanger pushed through. Tie your wire to the coat hanger and pull it through. It's a good idea to protect the wire as it routes into the engine compartment to keep it from wearing a hole in the insulation. But that's not too terribly hard to figure out.

I can probably take pictures later in the day.

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Old 06-26-2013, 12:01 PM   #3
Join Date: Aug 2011
Location: Chicago area
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I had to wire up some strobes and used an access hole filled with foam. I believe these are on both sides, and here is a pic of the passenger that I used as it's closer to the battery (I wanted a hard connection). It comes out along the edge of the hood. I recommend running a coat hanger from the engine-side and poke it through; it's very lightweight foam.

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Old 06-26-2013, 01:00 PM   #4
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Join Date: Mar 2013
Posts: 147
Thanks to both derf & BManz. The boss's jeep has a RockHard roll cage so no plastic panel just plate steel, no clips to break! She has been trying to decide how to cover or paint that open place. That should be fine to pull my wires. save me lots of work. Thanks for the quick reply.

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