Recommendations for passing wiring through the firewall

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Recommendations for passing wiring through the firewall

Postby Numbchux » Tue Apr 10, 2018 7:38 pm

Installing an Arduino-based LCD in place of the clock that will display some engine information, including WBO2. Not seeing a great place to pass wires through the firewall. Any recommendations?
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-Chux
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Re: Recommendations for passing wiring through the firewall

Postby underscore » Tue Apr 10, 2018 8:11 pm

Which side do you need to come through? Some people use the spot the wire harness goes through.
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Re: Recommendations for passing wiring through the firewall

Postby Numbchux » Wed Apr 11, 2018 5:33 pm

Could go either side. There's more room/access on the passenger side, but if there's a decent spot on the driver's side, that'd be fine.

The factory bellow where the wiring goes through is super easy to access in the engine bay, but I can't see it without taking the HVAC stuff out on the interior side.
-Chux
'91 Celica GT vert, poly bushings, rear discs, etc., DD
'87 unTurbo 4Runner, 4.3 swap, 35s
'89 Subaru XT6, 2.7L Flat 6, AWD, awesome
'84 Subaru Brat, 4" lift, 29s, Impreza engine, 4.444s
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Re: Recommendations for passing wiring through the firewall

Postby underscore » Wed Apr 11, 2018 7:21 pm

I don't think many spots are visible from the inside, I usually pick a spot near the top and use a stiff piece of wire to feed it down to where I can reach it.
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It's for sale! http://www.alltrac.net/phpBB2/viewtopic.php?f=64&t=52181
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Re: Recommendations for passing wiring through the firewall

Postby GT4times2 » Fri Apr 13, 2018 12:42 am

How big is the harness? I'd run it through the driver side (through the fender), by the air box area.
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Re: Recommendations for passing wiring through the firewall

Postby Numbchux » Fri Apr 13, 2018 1:02 pm

GT4times2 wrote:How big is the harness? I'd run it through the driver side (through the fender), by the air box area.



All said and done, probably 8-10 wires. Most are signal wires, so 18-20 gauge would be fine. But the WBO2 is going to need 2-3 heavier gauge ones.

It didn't occur to me to go through the fender....I'll have to look into that. I think I'll finally have some time to work on it this weekend. "Luckily" we keep getting snow, so I have plenty of time before I can drive it :x
-Chux
'91 Celica GT vert, poly bushings, rear discs, etc., DD
'87 unTurbo 4Runner, 4.3 swap, 35s
'89 Subaru XT6, 2.7L Flat 6, AWD, awesome
'84 Subaru Brat, 4" lift, 29s, Impreza engine, 4.444s
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