AUX Switch Wires and Pass Through Wires

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mmacfn

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Incredibly helpful!

Consolidating Upfitter Switches, Wires & Connections info into one post to help with installation (copying and printing)...

The overhead Upfitter Switches are wired from the factory to the location under the hood on the Passenger side. These 6 Auxiliary wires are provided so you can make your connections for all accessories (e.g., lights, compressor) installed outside the Raptor.

aux_switches.jpg

Above image courtesy of BajaMod

If you want to use Upfitter Switches to control accessories installed inside the Raptor you can do that too. You'll use the Pass Thru wires to get the switched power back inside the Raptor cab.

To do this you need to connect the Auxilliary Wires to the Pass Thru wires (which pass through the firewall from under the hood to the interior) and then connect your accessories inside the Raptor to the ends of the Pass Thru wires which are located under the Passenger side Kick Panel.

There are 2 sets of 6 wires under the hood as shown in this excellent pic from MaxMartini:

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The first set of wires are the Auxiliary wires connected to the 6 Upfitter Switches. They're on the LEFT side. These will be used when wiring up any accessories outside the Raptor.

blunt-cut%20wires.jpg

Above graphic courtesy of Ford & BajaMod

The second bundle of wires are the Pass Thru wires which are on the RIGHT side. These will be used when wiring up any accessories inside the Raptor.

Both these wire bundles of 6 wires have corresponding (matching) colors so you can easily see how to make the proper connections when wiring up any of the Pass Thru wires. To use the Pass Thru wires you'll connect the Pass Thru wire(s) you want powered inside the cab to the Auxilliary wire(s) under the hood. You'll obviously only connect the Pass Thru wire(s) if you plan on using one or more of them inside the Raptor.

blunt-cut%20wires2.jpg

Above graphic courtesy of BajaMod

You'll need to remove the Passenger Side Kick Panel to locate and pull down the Pass Thru wires inside the cab so you can make your connections there.

Here's another great pic from MaxMartini showing the Passenger Side Kick Panel and the Pass Thru wires where they are bundled together:

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Notes:
* Each switch already has a relay and a fuse installed. If you do not plan on exceeding the amp draw of the fuse for each switch, you do not need to install the relay that comes with your accessories.

* Be sure not to exceed the amperage for each circuit. You will want to choose the circuit that most closely matches your device amp draw without going over. You may want to insert a lower wattage fuse for small devices so that your device is not way over fused. It is also a good idea to carry a few extra fuses of assorted amperage in your truck in case something blows a fuse.

Reference info:

91380d1502479007-upfitter-switch-wire-harness-bundle-screen-shot-2017-08-11-12.14.46-pm.png


91381d1502479007-upfitter-switch-wire-harness-bundle-screen-shot-2017-08-11-12.14.58-pm.png


fuse_box.jpg


Link to BajaMod info: BajaMod
 

Clockton

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I am losing my mind trying to find the pass through wires in the cab of my '18. I can't find the bundle anywhere.
 
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grumble

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I am losing my mind trying to find the pass through wires in the cab of my '18. I can't find the bundle anywhere.

Curious as to what you're wiring up inside the cab that needs an upfitter switch!
 

robbcwz

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I am losing my mind trying to find the pass through wires in the cab of my '18. I can't find the bundle anywhere.

Deep behind the passenger side kick panel. Either remove the panel or use a mirror and flashlight to go fishing for them.
 

Clockton

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removed the panels and spent hours looking. Thwarted. I think Ford has it out for me. Trying to connect a tailgate drop
 
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grumble

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I cannot answer for him, but I have a radar detector connected to one of mine. Makes for a nice, cord-free install.

And boom! I knew I asked this question for a reason. I was going to use a blend mount and a mirror tap for my Valentine 1 and Thinkware dash cam but was afraid it'd pull too much current and start jacking the electronics in the mirror/cam.

Excellent.

---------- Post added at 09:43 AM ---------- Previous post was at 09:41 AM ----------

removed the panels and spent hours looking. Thwarted. I think Ford has it out for me. Trying to connect a tailgate drop

The pass-throughs are going to be taped up along with a bunch of other wires. You'll have to cut the bundle open to find them.
 

Clockton

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And boom! I knew I asked this question for a reason. I was going to use a blend mount and a mirror tap for my Valentine 1 and Thinkware dash cam but was afraid it'd pull too much current and start jacking the electronics in the mirror/cam.

Excellent.

---------- Post added at 09:43 AM ---------- Previous post was at 09:41 AM ----------



The pass-throughs are going to be taped up along with a bunch of other wires. You'll have to cut the bundle open to find them.

Any guidance on where the bundle is located?
 

grumble

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Any guidance on where the bundle is located?

On my 2018, they're NOT where the photo indicates - they're taped way up above the fuse box and they're too darned short to do anything with, even after untaping them. grrr.
 
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