Where do these wires go

[Ottsville]

2024 2500 Laramie Cummins - What are these two dead-headed wires located above the spare tire? They look about 12 ga. I've looked several places for answers, but nothing conclusive from any of the forums

 

[dieselscout80]

Here’s a starting point for your reading on those “Blunt Cut Wires”.

Post in thread 'Aux Switch wiring location'

Jul 12, 2025

Anyone know what the Brown/Grey wire in port 2 does?

View attachment 87699

You should look through the sticky below the image:

W550 Pin 2 BG/GY pass-thru circuit. It will be bundled with 3 other blunt cut wires near the Aux PDC in the engine bay. Those other 3 are on the white upfitter jumper if you have a 21+.

• Brutal_HO

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[Brutal_HO]

This is the root sticky that attempts to consolidate a lot of those wiring questions:

Thread 'In Cab Power FAQ -- AUX Switch power info -- Chassis power info'

Apr 1, 2022

This is a roll-up thread that should answer most if not all questions regarding power availability in the cab.

A lot of the credit for technical detail goes to @Jimmy07 without whose help and guidance much of this info would be hard to assemble.
There are other contributors, you know who you are. If you recognize a photo as one of yours, shoot me a PM and I'll add the credit.

PDC and AUX PDC Fuse worksheet: https://docs.google.com/spreadsheet...ouid=105565244363658163151&rtpof=true&sd=true
or here...

• Brutal_HO
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