Firewall!! - Toyota Yaris Forums

plushDJ · 05-30-2006, 08:01 PM

So, I read a post on here where one guy says you need to drill a hole in the firewall for amp wire and another guy says there's already a hole there. So here's a question for the guy who found the hole.....can you get a pic of it because I can't find it. And how hard is it to run the wire through the engine compartment because it looks cramped as hell to me.

JaiTomato · 05-30-2006, 08:56 PM

Here is a hole I found: In the passenger side under the floor mat where it looks like the A/C drains. I just drilled a hole in the rubber just snug enough for the amp wire.

plushDJ · 05-30-2006, 09:48 PM

Hey cool, that might work, I opted out on the a/c so hopefully I'll just have a big rubber plug to play with. I'm running 1/0 gauge so I'll need lots of space lol.
And I see you ran the rca under the dash too. Just a word of advice, sometimes if you run the rca and the power cable too close too each other you'll get a distorted signal, but it doesn't happen very often. You should be ok.

plushDJ · 05-30-2006, 10:05 PM

well, I found the plug and no way my wire'll fit. Any other suggestions?? Anyone?? Please help, I don't wanna have to pay for something I can do myself

Sp33dY · 05-30-2006, 10:47 PM

Why dont u justr remove a gromet, and redrill a bigger hole, replace with a bigger grommet ... VOILA... SURELY there is somewhere through the firewall using an existing rubber grommet??!!??!

Run power down one side of the car .... RCA's down the other .... EASY. !

Bones · 05-31-2006, 12:00 AM

There's a big rubber grommet with "nipples" on the driver side. It's where most of the car wiring runs inside. You can cut the nipple and it' an instant grommet. I ran a 10g, two 12g, and other alarm wiring through it. It's hard to get to, unless you remove the black metal plate (runs across the engine bay) that the windshield wiper motor mounts to. It's held on by several 10mm bolts. It'll take a good half hour but it's well worth it, as the wires are hidden and away from water path.

RCA and speaker wires, a good rule is at leat 12inches away from power wires. You can also run it on opposite sides of the car. There are alot of good "shielded" RCA which wil prevent engine noise if you wish to put them beside power wires.

plushDJ · 05-31-2006, 10:14 PM

Awesome, thanks boys!!!

mikeukrainetz · 06-01-2006, 12:20 AM

Ive posted a whole how to on Yarisowners.com (probably the same thread that was mentioned earlier).
I have now posted photos as well, some supplementary info if you will.

Drilling the hole in the firewall was simple, didnt take much time, easy access and provided a good location for access to the battery and door sills without sacrificing an extra three or four feet of cable.

See the post it may or may not answer your questions but it may help.

05-30-2006, 08:01 PM	#1
plushDJ Drives: 2007 3 dr manual Join Date: Apr 2006 Location: Red Deer, AB Posts: 169	Firewall!! So, I read a post on here where one guy says you need to drill a hole in the firewall for amp wire and another guy says there's already a hole there. So here's a question for the guy who found the hole.....can you get a pic of it because I can't find it. And how hard is it to run the wire through the engine compartment because it looks cramped as hell to me.

05-30-2006, 10:47 PM	#5
Sp33dY www.OZTOYOTA.com Drives: Toyota Echo Join Date: Feb 2006 Location: VIC, Australia Posts: 239	Why dont u justr remove a gromet, and redrill a bigger hole, replace with a bigger grommet ... VOILA... SURELY there is somewhere through the firewall using an existing rubber grommet??!!??! Run power down one side of the car .... RCA's down the other .... EASY. ! __________________ www.oztoyota.com - Australian Toyota ECHO and YARIS Club

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05-30-2006, 09:48 PM	#3
plushDJ Drives: 2007 3 dr manual Join Date: Apr 2006 Location: Red Deer, AB Posts: 169	Hey cool, that might work, I opted out on the a/c so hopefully I'll just have a big rubber plug to play with. I'm running 1/0 gauge so I'll need lots of space lol. And I see you ran the rca under the dash too. Just a word of advice, sometimes if you run the rca and the power cable too close too each other you'll get a distorted signal, but it doesn't happen very often. You should be ok.

05-30-2006, 10:05 PM	#4
plushDJ Drives: 2007 3 dr manual Join Date: Apr 2006 Location: Red Deer, AB Posts: 169	well, I found the plug and no way my wire'll fit. Any other suggestions?? Anyone?? Please help, I don't wanna have to pay for something I can do myself

05-31-2006, 12:00 AM	#6
Bones Drives: 07 Yaris S Type Join Date: May 2006 Location: San Diego Posts: 42	There's a big rubber grommet with "nipples" on the driver side. It's where most of the car wiring runs inside. You can cut the nipple and it' an instant grommet. I ran a 10g, two 12g, and other alarm wiring through it. It's hard to get to, unless you remove the black metal plate (runs across the engine bay) that the windshield wiper motor mounts to. It's held on by several 10mm bolts. It'll take a good half hour but it's well worth it, as the wires are hidden and away from water path. RCA and speaker wires, a good rule is at leat 12inches away from power wires. You can also run it on opposite sides of the car. There are alot of good "shielded" RCA which wil prevent engine noise if you wish to put them beside power wires.

05-31-2006, 10:14 PM	#7
plushDJ Drives: 2007 3 dr manual Join Date: Apr 2006 Location: Red Deer, AB Posts: 169	Awesome, thanks boys!!!

06-01-2006, 12:20 AM	#8
mikeukrainetz View User's Garage Drives: 2006 Toyota Yaris Join Date: May 2006 Location: Canada Posts: 564	Ive posted a whole how to on Yarisowners.com (probably the same thread that was mentioned earlier). I have now posted photos as well, some supplementary info if you will. Drilling the hole in the firewall was simple, didnt take much time, easy access and provided a good location for access to the battery and door sills without sacrificing an extra three or four feet of cable. See the post it may or may not answer your questions but it may help.