Upfitter work
Logistics Pro
Joined: Mar 2005
Posts: 2,536
Likes: 200
From: southeast PA
I'm good with stuff like that, but I have not figured out how the panel comes out under the column on my 13 yet. It really wouldn't help if it did. You slither in on your back arms first and work under the dash. Then curse Ford for not making the wires 2" longer. It's not easy access.
Mountain Pass
Joined: Jan 2015
Posts: 105
Likes: 3
)once you find the passthrough wire under the dash, then you also need to find the wire for whichever switch you intend on using, using the upfitter guide that's previously been posted, keeping in mind the amp limitations of each particular switch.
for instance, my 53" bar, was to be connected to switch 1 because of the amp rating of the bar (21 amps).
1) ground wire on light bar to negative battery terminal
2) hot wire on light bar to one of the 4 passthrough wires under the hood (I believe I used the solid white wire: easier for color blind idjits
3) switch one uses the solid yellow wire under the dash
4)connect the solid yellow (switch one) to the solid white (passthrough wire hooked to hot wire under hood) wire under your dash...
easy peasy...once you get the colors figured out & figure which of the literally dozens of wires you need to use
shot of the 4 passthrough wires, 2 in use
closeup of passthrough ends under hood (by main fuse panel, drivers side, against firewall
the initial mess under the dash
jumble of what you need to sort through to find which wires you need
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More Turbo
Joined: Feb 2011
Posts: 719
Likes: 17
Thanks for the responses, and especially the pictures. The functionality is much clearer to me, but I've scrapped doing it myself as I don't have the skills, especially for running the wire inside and up to the top of the dash. Local truck outfitter is going to do it all for me next week.
Elder User
Joined: Oct 2014
Posts: 607
Likes: 3
From: CT
I ended up splicing & soldering my wires onto the ends of the upfitter stubs. (I HATE having to solder upside-down directly over my face!)
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More Turbo
Joined: Feb 2011
Posts: 719
Likes: 17
Took several years to find a use for all of the upfitters, but they're all proudly connected and working as designed. Made the 900 mile trek to Nashville and back and all devices performed perfectly, especially the wireless observation camera. The GPS and camera monitor wires run up through the dash to the tray up top, with the TPMS receiver in the lower left. Eliminates the need for three 12 volt plugs.
Mountain Pass
Joined: Mar 2017
Posts: 155
Likes: 37
I think you're getting the pass through wires and upfitter wires confused.
The upfitter wires are tied up around the parking brake and are already connected to the relays an switches. These 4 wires will have power when you turn the associated switch on. The wire colors and amp ratings are all clearly written out in the owners manual.
The pass through wires are 4 (or 5, I forget) wires that are routed through the firewall in the main harness that do nothing more than have a sealed cap on each end. These are for if you need to run a wire outside the cab, you already have a few wires run through the firewall, you just need to connect to both sides. The inside of the pass through wires is tied up in the bundle of customer access wiring to the left of the brake pedal. The outside is tied up behind the power distribution box near the left hood hinge.
For what you are trying to do, you will not need the pass through wires. All you need to do is connect your power wire from the TST hardwire harness to the wire from the upfitter of your choosing. Same with your camera wire, connect to another upfitter wire. Connect ground wires to a ground under the dash and you're set. Flip switches and power your stuff up!
The upfitter wires are tied up around the parking brake and are already connected to the relays an switches. These 4 wires will have power when you turn the associated switch on. The wire colors and amp ratings are all clearly written out in the owners manual.
The pass through wires are 4 (or 5, I forget) wires that are routed through the firewall in the main harness that do nothing more than have a sealed cap on each end. These are for if you need to run a wire outside the cab, you already have a few wires run through the firewall, you just need to connect to both sides. The inside of the pass through wires is tied up in the bundle of customer access wiring to the left of the brake pedal. The outside is tied up behind the power distribution box near the left hood hinge.
For what you are trying to do, you will not need the pass through wires. All you need to do is connect your power wire from the TST hardwire harness to the wire from the upfitter of your choosing. Same with your camera wire, connect to another upfitter wire. Connect ground wires to a ground under the dash and you're set. Flip switches and power your stuff up!
Thank you
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