Working on a '93 250 Dodge Cummins Diesel 4WD. Speedo went wacky intermintantly. Then speedo and odom wouldn't work (mostly in rainy weather). Cruise control didn't work either, nor did overdrive. Now speedo/odom/cruise/OD don't work at all.

Gonna replace the speed sensor first, since we have that. Now for the dumb question... Where is it located? I've seen about 4 diferent different versions. Hoping I can get an answer from someone who has one...

If speed sensor doesn't fix everything, we'll try the instrument cluster next. Does this sound like the way to go? Any advice is appreciated.

Thanks in advance,

Mac

 

It'll be right on top of the rear pumpkin.

 

Well, if the first gen is like a second gen than it's gonna be on top of the axle

 

I believe my 99 had one in the transfer case and one in the pumpkin.

 

I had the same issues a couple of years ago and it was the sensor on top of the back axel. You can try to clean it up as it might be covered with crud and fairly easy to replace. When mine went out, the spedo died and the abs came on.
Q

 

Same here, but I had to replace mine.

 

the vehicle speed sensor is on the tail of the transfer case. The rear speed sensor for the ABS is on the top of the rear diff. I just changed both out.