Wire from cabin to engine bay
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Mountain Pass
Joined: Mar 2021
Posts: 114
Likes: 25
Wire from cabin to engine bay
Finally found the time to tackle high idle mod on my truck. Only problem is the pass though wires are impossible to access. Some Ford engineer/assembler or some mechanic taped the wires seal tight with another harness which runs all the way down. I can see couple of inches of the 4 pass through wires but no way in hell I can free them. Been working around over one hour trying to free the fuse box too before admitting defeat.
So my question would be what’s best way to run a wire from the passenger side to the engine bay?
So my question would be what’s best way to run a wire from the passenger side to the engine bay?
Lead Driver
Joined: Dec 2020
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This is on a 2020? I've seen a video accessing the pass through wires on a 2020 and the guy removed the BCM for more access.
I've also read of there being a large grommet around a wire harness in the passenger firewall area (drivers side has one too), a hole can be punched in it and wires fed through. Not sure what needs to be removed on the engine side to access it.
Here's a thread that shows the grommets. https://www.ford-trucks.com/forums/1691149-how-to-run-wires-into-the-cab-of-a-2021-f250.html
I've also read of there being a large grommet around a wire harness in the passenger firewall area (drivers side has one too), a hole can be punched in it and wires fed through. Not sure what needs to be removed on the engine side to access it.
Here's a thread that shows the grommets. https://www.ford-trucks.com/forums/1691149-how-to-run-wires-into-the-cab-of-a-2021-f250.html
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Mountain Pass
Joined: Mar 2021
Posts: 114
Likes: 25
In the end I used the grommet in the driver footwell to go through the firewall. Ran the wire across from driver to passenger side kick panel and that was it.
Used @zeroo suggestion to use a big zip tie to send the wire through, and in my case I used one of my wife's super grease cream to let the wire slide through.
Used @zeroo suggestion to use a big zip tie to send the wire through, and in my case I used one of my wife's super grease cream to let the wire slide through.
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RUSTY50F1
1948 - 1956 F1, F100 & Larger F-Series Trucks
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