Spare Wires?
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New User
Joined: Jun 2019
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From: Pacific Northwest
Spare Wires?
I have a 2019 F350 Lariat Crewcab 6.7 with rear camera, in bed lights and 5th wheel plug. Does anyone know if there are any extra unused wires going from the engine compartment to the rear of the truck?
Logistics Pro
Joined: Apr 2000
Posts: 4,334
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From: Mills River
I’m not aware of “extra unused wires going from the engine compartment to the rear of the truck”. My understanding is that these are four short pass-through wires in the front passenger footwell.
What are you trying to do?
HTH,
Jim / crewzer
What are you trying to do?
HTH,
Jim / crewzer
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New User
Joined: Jun 2019
Posts: 24
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From: Pacific Northwest
I'm going to install some supplemental backup LED lights powered by one of the upfitter switches. If there is already a wire pulled I won't have to pull one for the lights. Was hoping someone with access to a wiring diagram could take a look and see if a spare was already in place. Since the truck already has all available options associated with the bed it's unlikely there is a unused plug in the wiring harness back there. Seems like I read someplace that there was a single spare wire at one of the tail light plugs. Haven't looked yet.
Logistics Pro
Joined: Apr 2000
Posts: 4,334
Likes: 306
From: Mills River
The only “spare” I’m aware of at the rear is an extra brake light circuit for power the high-mount stop light on a topper.
https://madocumentupload.marketingas...adb80&v5=False
The upfitter switch harness is bundled up under the fuse- and relay boxes in the driver side engine compartment. It shouldn’t be too difficult to run an extra circuit from there to the back of the truck.
https://madocumentupload.marketingas...1fb63&v5=False
https://madocumentupload.marketingas...e460d&v5=False
HTH,
Jim / crewzer
https://madocumentupload.marketingas...adb80&v5=False
The upfitter switch harness is bundled up under the fuse- and relay boxes in the driver side engine compartment. It shouldn’t be too difficult to run an extra circuit from there to the back of the truck.
https://madocumentupload.marketingas...1fb63&v5=False
https://madocumentupload.marketingas...e460d&v5=False
HTH,
Jim / crewzer
Fleet Mechanic
Joined: Aug 2005
Posts: 1,339
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From: NJ
On older truck this worked great, however on the newer trucks doing this will cause the computer to think their is a trailer connected.
Laughing Gas
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Logistics Pro
Joined: Nov 2004
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Might be able to use these plugs if you have them
https://www.ford-trucks.com/forums/1...pare-tire.html
https://www.ford-trucks.com/forums/1...pare-tire.html
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