OD, Speedo, and DRL Not Working - 1993 W250
 

Hey all, sorry to bug again, I know this question has been asked before but here I am. I was driving down the highway and I completely lost my overdrive and speedo right away, I've read that it could be the VSS or the DRL module. When I got home I turned the truck over and moved up about 10 feet and the DRL did not come on. Would either of these be the cause for my overdrive, speedometer, and daytime running lights not to work.

I also don't know where the VSS is exactly, all I know is that it's by the T-case, any guidance or help would be much appreciated, especially with photos to help me find what I'm looking for exactly.

Thanks!
Dig

It's on the driver's side of the T case by the output shaft. There is also a ratio adapter between the T case and the VSS that is a common failure point.
https://cimg6.ibsrv.net/gimg/www.die...9b34558720.png