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2026 Pass through wires

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Old Apr 22, 2026 | 04:01 PM
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2026 Pass through wires

I have searched and searched this forum and have not found anything that will help me find the pass through wires under the dash. I’ve seen some videos that show where they are in the engine bay, but I haven’t started to look for them, yet. I’ve about ruined my back under the dash. Any help would be appreciated. One search that I found, the guy ended up running new wires through the dash, but I’d rather use the ones that Ford provided.
 
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Old Apr 22, 2026 | 06:01 PM
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Joe,

For me, removing the glove compartment then looking at the right side of the firewall found them. Keep in mind these wire are a very small gauge and should not be used for high current applications.
Best of luck.
 
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Old Apr 22, 2026 | 06:16 PM
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In this thread are pictures of the pass through wires.
 
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Old Apr 22, 2026 | 08:02 PM
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Thanks guys. I’m only going to use one for a high idle control, so it will be very low current. I took off the glove compartment, the kick panel, the cardboard thing and I found the upfitter wires right away. I can’t believe the Ford Engineers put them in an area that is so difficult to reach. Maybe they want us to have the dealer mechanics do the work.
Archion, I remembered the thread that you linked, but I sure couldn’t find it with the search function.
 
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Old Apr 22, 2026 | 08:51 PM
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Mine were hard to find as well. I had to reach up from the bottom and then they were kind of sitting on top of the fuse box. The large gray connector you see in the photo was hiding them.

 
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Old Apr 23, 2026 | 08:04 AM
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Also, I think just one of those wires is a switched 12v. The rest are pass through. Handy for dash cams etc.
 
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Old Apr 23, 2026 | 05:25 PM
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Originally Posted by F250DogHLR
Joe,

For me, removing the glove compartment then looking at the right side of the firewall found them. Keep in mind these wire are a very small gauge and should not be used for high current applications.
Best of luck.
Originally Posted by Archion
In this thread are pictures of the pass through wires.
Originally Posted by Redman812
Mine were hard to find as well. I had to reach up from the bottom and then they were kind of sitting on top of the fuse box. The large gray connector you see in the photo was hiding them.


I’ve been working on the truck for the better part of the day. Like you, I finally found the pass thru wires in top of the fuse box, not on the side like others found them. Since these are customer access wires, Ford should put them where the customer can reach them without being a contortionist. Thanks again to all that helped me.
 
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Old Apr 26, 2026 | 05:36 PM
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My 6.7 26’ KR has idle up built in. Hmmm, If I run into store or in driveway hooking up, it goes to around 1200 all by itself
 
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Old Apr 27, 2026 | 05:22 AM
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Look at ARods latest.
 
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Old Apr 27, 2026 | 08:48 AM
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Originally Posted by Electrified47
It has definitely kept me busy all weekend!
Ordered another 1000ft of 12ga wire this morning, another 100 connectors. And some 17-22 connectors.
 
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Old Apr 27, 2026 | 11:25 AM
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Originally Posted by Joe/GA
I can’t believe the Ford Engineers put them in an area that is so difficult to reach..
On my previous 2011 F-350 DRW 6.7 the wires were barely accessible under the master cylinder.
 
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