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D40.5 and D41 Wiring Diagram PDFs

3.5K views 14 replies 8 participants last post by  RJ_  
#1 · (Edited)
These are not as nice to navigate as the e-wiring diagrams, but still an excellent resource. The items in the table of contents are clickable, so that quickly sends you to the relevant page.

Harness layout has been particularity useful to me where you can see harnesses as they lay in the truck such as this:

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From time to time there are updates, so I will try to keep an eye out for those. If I have access to 2026 and beyond, I'll keep adding to the list. Files beyond 20MB cannot be uploaded here, so I'll use Google Drive.


YearFile SizeLast Update
202019.9 MBAugust 2021
202119.9 MBAugust 2021
202221.6 MBJune 2025
202326 MBJune 2025
202422.5 MBJune 2025
202523.5 MBJuly 2025
202623.6 MBJuly 2025


Edit History
Feb 3 2025 - added file size and updated 2024 link
Feb 10 2025 - Added 2022-2025 Builder's Guide
June 25, 2025 - 2022-23 got an update, so I am adding a date column to each.
June 28, 2025 - 2024 got an update
July 31, 2025 - 2025 got an update
Sep 2, 2025 - 2026 released, no new BBG
 
#4 ·
For sure, I learned this with my 2012. I had a wiring diagram for a 2016 and probably 90% of it matched but sometimes the colors were different for some reason. On something as simple as the taillights, they had one or two color variations on the wires on some years.
 
#10 ·
print not download, that would defeat the entire purpose of having it subscription. Printing is at leas a big enough hurdle most wont print out the entire document.

you could also use mitcheldiy or alldatadiy which both give you the factory manual plus a whole lot more at a reasonable price.


 
#14 ·
2025 got an update as well, I was wondering if it was going to eventually follow 2024 and 2023.

In other related news, I love that Drive treats a new file with the same name as a version. I also don't have to update links, as long as it's replacing it, the links stay live with the most updated version.

I have the option checked to keep the previous version on file, so if needed for whatever reason, previous versions will be available.

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