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Old 06-30-2019, 02:18 PM   #1
Join Date: Apr 2019
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Firewall pass through 2013 Ford E350

You would think passing one 10 gauge wire from engine compartment, through firewall, into cab would be easy.
Itís not.
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Old 06-30-2019, 03:25 PM   #2
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No it's not! I got lucky and found an empty grommet in the firewall of my GMC above the gas pedal. Granted not the same make but there might be spare pass through in there somewhere.

'07 GMC 2500 6.0
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Old 06-30-2019, 03:35 PM   #3
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Alternatively, there are grommets inside the front fenders leading into the cab.

There’s also an option of coming up through the DS or PS front door sills.
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Old 06-30-2019, 10:19 PM   #4
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Also there's a set of factory pass-through wires, as part of the "upfitter" connectors. Underhood end is above the brake booster, attached to the windshield cowling. Cab end is at the steering column.
2000 E450 dually V10 wagon
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Old 06-30-2019, 10:24 PM   #5
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I finally got my wire through the boot that is pictured, the one where all the factory wiring is run through. I used a metal coat hangar and stabbed through the boot. Once through you have to angle it up down or around because there are stuff and things directly behind the boot. Taped my wire to my hanger and I was off to the races.
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