I just recently bought a 93 ram 250 and I want to put one on mine and im kinda bad on computers so I can't find a Tach on the internet and me and my fellow diesel power freaks are very curious as to where the tach hooks up to.

 

Isspro has diesel tachs that plug right into the factory wiring. The 91.5-93 (I think those are the right years) had the factory wiring. The wires are on the left side of the steering column close to the fuse block. There are 4 wires in a flat plug and the wires are red, black, orange, and black (I think). The 89-91 trucks did not have the wiring, you would need a crank sensor or alternator trigger to install one on those trucks.

 

Thanks for the info

 

BC847 just recently posted a thread about adding a tach to his firs gen. truck. Heres a link to the thread. it should tell you everything you need to know. https://www.dieseltruckresource.com/...d.php?t=173561