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Unread 12-07-2013, 06:44 AM   #1
Pierre_r
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Good place to run wires through firewall?

I know there was a thread that was about this but i cant find it now.

I have a hdh switchpanel that i am going to mount in my ZJ to controll lights and other things.
Are there are already holes in the firewall that i can use and run wires from the relays and to the controll unit that comes with the kit?
Or i have to drill my own ?

Since it has 8 switches i was thinking that i could prepare the others for future use by already run the wires to it so i would need to run in 8 wires from the enginebay.
Then i must have room for the 10awg wire for the power to the controll unit and a small 18awg for the ground, so in total 10 wires from the enginebay to the inside.

The wiresize i was thinking of using for the relay,s is 2.5mm2 (14awg)

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Unread 12-07-2013, 11:11 AM   #2
kildog65
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So on the passenger side where your antenna is you can run a wire from under the hood through a he where your antenna is on the front passenger side and there is a grommet there with the antenna wit running through and then you can easily run wires under your dash to the driver side
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Unread 12-07-2013, 11:56 AM   #3
JasonStebbins
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I have two holes that I use for all my auxiliary stuff. Drilled them behind the passenger carpet right in the middle, then along the left side coming through where the VIC was.
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Unread 12-07-2013, 12:27 PM   #4
durango-bob
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There are a few large rubber grommets that already have stuff going through the firewall. I've put holes in the grommet and run wires through those.
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Unread 12-07-2013, 12:57 PM   #5
JasonStebbins
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Quote:
Originally Posted by durango-bob View Post
There are a few large rubber grommets that already have stuff going through the firewall. I've put holes in the grommet and run wires through those.
Are these on the driver's side? All my wires come through the passenger because it's a clear path over there.
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Unread 12-07-2013, 02:40 PM   #6
WhiteOut
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There is an existing hole in the driver's side firewall that has a plate bolted over it. Or alternatively, just run them through the same hole as the hood release cable.
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Unread 12-07-2013, 03:03 PM   #7
Pierre_r
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Ok i have to go out and check tomorrow when it is light outside and see if i can find any of those spots that you are talking about.
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Unread 12-07-2013, 04:46 PM   #8
Darkrocker
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Quote:
Originally Posted by JasonStebbins View Post
I have two holes that I use for all my auxiliary stuff. Drilled them behind the passenger carpet right in the middle, then along the left side coming through where the VIC was.
Pretty much exactly what I did with all the wiring for my lights. Mounted my switches on the drivers side above where my right knee would rest, ran the wires behind the VIC/Climate control area and under the carpet to the passengers side. The power for my roof lights ran from the same area, then up behind the door jab (where the factory overhead harness is), up the a-pillar and through a small hole in the roof which comes out under the roof rack mounting rail.
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Unread 12-08-2013, 11:09 AM   #9
bjorn17
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Quote:
Originally Posted by WhiteOut View Post
There is an existing hole in the driver's side firewall that has a plate bolted over it. Or alternatively, just run them through the same hole as the hood release cable.
Interesting. Care to explain a bit further? Where can it be seen directly?
BTW 5.2l engine.
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Unread 12-08-2013, 11:33 AM   #10
OverlandZJ
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Quote:
Originally Posted by bjorn17 View Post
Interesting. Care to explain a bit further? Where can it be seen directly?
BTW 5.2l engine.

Between the master cyl and fender, where the clutch master would have been installed.

I'v used this area for my CB coax, and other wiring such a my Hella's. Several relays mounted there as well. Use appropriate sized grommets.
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Unread 12-08-2013, 11:59 AM   #11
bjorn17
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Quote:
Originally Posted by OverlandZJ View Post
Between the master cyl and fender, where the clutch master would have been installed.

I'v used this area for my CB coax, and other wiring such a my Hella's. Several relays mounted there as well. Use appropriate sized grommets.
Cheers, will check that out. Just installed lights in front and used the hood cable grommet but that was a lot of pain. Will see that option next.

B.
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Unread 12-08-2013, 12:43 PM   #12
Pierre_r
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i found the plate on my ZJ and then i found it in the fsm
Here is it:


Dont know how to make the pic bigger but the plate that covers the hole is #9
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Unread 12-08-2013, 01:08 PM   #13
WhiteOut
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Yep, thats the one I removed.
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Unread 12-08-2013, 08:43 PM   #14
Mickey_D
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Just one thing I'd like to add:

You said the power wire is 10ga but the ground is only 18ga. All ground wires should ALWAYS be larger (at bare minimum the same size) as the power wires. ALWAYS.
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Unread 12-08-2013, 09:01 PM   #15
RICEKILA
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I carefully just use an ice pick through the A/C hose gromett -- usually enough space for a few wires and makes a good seal -- on the YJ the wires come out under the battery --

P/S -- for the light bar I just finnished -- two light wires / two ground wires / and an extra just because I was under there -- all 10g. through their own holes --
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