Where to run 4 awg wire through firewall? - Ranger-Forums - The Ultimate Ford Ranger Resource


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  #1  
Old 04-05-2008
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Where to run 4 awg wire through firewall?

Hey all,

Well I am installing a system in my truck today and was wondering where the best place to go through the firewall was. I am looking but I see nothing.

It's a 08 Mazda B4000 5 speed 4x4.

Thanks
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Old 04-05-2008
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you wont be able to get the grommet back in the hole, but the hood release cable is the hole i use for all my wires. not sure if its big enough for 4g but its worth a shot
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Old 04-05-2008
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That looks a little tight even for 8 awg wire. Isn't there anywhere else I could go through? I see like nothing. I am poking a coat hanger through but still nothing makes it all the way through!
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Old 04-05-2008
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Unbolt your fuse box and move it and then drill a hole in the firewall behind it. Put a grommet on and your good to go. Thats what I did, makes life a lot easier running wires for accessories. I need to do another one now though.
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Old 04-05-2008
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you might just have to drill a hole in the firewall if there arent any holes big enough.
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  #6  
Old 04-05-2008
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umm No good, I don't have a drill. Man. ahhhh why can't this be easy? Any other car and i have no problems, with a mazda I have to drill or use like 12 awg
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  #7  
Old 04-05-2008
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I ran both of mine through where the factory wiring harness goes through. Problem is that the plastic cap that seals it from the hood side won't go back on. I think my next project will be to drill a hole and use a grommet
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Old 04-05-2008
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Go find a friend with a drill and borrow theres
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Old 04-05-2008
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I also don't want to drill. There should be enough holes but damn. Oh well my problem now.

Thanks all for your help
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  #10  
Old 04-05-2008
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you could run it through the where the steering shaft goes, just make absolutely sure theres no way itll get caught around it.
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  #11  
Old 04-05-2008
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Yeah thats what I ended up doing, I just poked a screw driver through there and now I am running the wires, thanks
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Old 04-05-2008
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I ran mine through the steering shaft grommet, I just tied it out of the way. It's been two years now with no problems.
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Old 04-05-2008
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I ran my 4ga amp power wire through the steering grommet. just slice a hole in the grommet, and route it carefully....you can keep it a full 1.5" away from the shaft if you wanted.
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  #14  
Old 04-05-2008
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Had the same problem with mine. Kept looking for a place to run the wire safely. (Was going to drill.) As I'm poking around, I find this blob of gummy substance on the firewall. Being curious, I pulled it out.... Previous owner had drilled a hole and the sealed it with something after he sold it. Works for me!! All I had to do was cram a grommet in there and run the 4ga. Problem solved! Sometimes things just work out for me.... then again, sometimes they don't....
-Chance
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Old 04-05-2008
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What I woudl recommend if you plan on rewiring speakers and adding in amps and whatnot...


Drill 2 or 3 holes and fill the unused ones with plugs and soem thick rubber to keep the sound out.. And make sure its jsut big enough to push a 0 gauge through.. that way you have plenty of options, and you'll never have to redo everythign later if you plan on runnign mroe thorugh.. helps seperate what you want and dont want split up.
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  #16  
Old 04-05-2008
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Well for me, the easiest way was through the steering, I kept it away but I am not too worried, I zip tied it down, it should be good. I do agree drilling is the best way but I hate doing it.
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Old 04-05-2008
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Why not just do it the right way and get a freakin drill. It's a truck drilling a little hole in the firewall that no one will ever see isn't going to make a difference and will be a lot safer than putting it besides the steering shaft.
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Old 04-06-2008
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Problem is......is finding a good location where your drill will fit! Even a little more difficult for us manual trans guys.

I plan on taking off my engine compartment fuse box, and seeing if I can drill a good 1" hole there on the firewall. Nice, hidden, cleek location to run wires.


BTW.....I have a total of 7 wires going through my steering grommet.......and have for about 25k. No problems. You use the sound material on the firewall to your advantage.
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  #19  
Old 04-06-2008
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Shane thats what I did, thats the only way I could find room to get the drill back there to actually drill a hole just like you said. It makes life easier just moving the fuse block out of the way.
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Old 04-06-2008
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https://www.ranger-forums.com/forum2...wires+firewall

i ran it below the electrical box on the driver side firewall.
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  #21  
Old 04-06-2008
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I'm not sure about the new Rangers, But i found a stock hole behind my driver's side jump seat. I put a hole in the fire wall already between the clutch and brake, but its a bit tricky manuvering it so it doesn't get pinched. I'll be rewiring this week though
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  #22  
Old 04-06-2008
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Yeah mine has a hole there too that I ran my CB antenna cable through.
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  #23  
Old 04-16-2014
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There is a factory grommet on the passenger side far up the firewall on the right side, not easy to see it but you can feel what it is, comes out under the blower motor, ran 4 gauge through there with no problem, just cut a slit in the grommet and push the cable though
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