gauges

[Big Red]

i have a 92 cummins and i need to know what the best way to wire in a tac. anyone have any ideas?

 

[rebel_horseman]

Buy the Isspro gauge and harness. It plugs directly into the factory tach harness under the dash. Other than that, you'll need the magnet kit and a pickup that reads revs off the harmonic balancer. I have this style and the magnets are a PITA (which is why it hasn't worked since I installed them).

 

[crashnzuk]

Provided his truck has a tach pick-up from the factory. I've heard that the 92s were hit or miss. If you don't have the wiring already, you need to use the magnetic pick-up, or an alternator signal. You could probably make a pick-up work off of the flywheel ring gear, but that would require a bit of effort.
Travis..

 

[rebel_horseman]

The '92's should have the hookup. The 91's are hit and miss because that was the year of the transition from non-IC to IC engines.

 

[crashnzuk]

For reference, my 91 is intercooled and does NOT have the wiring.
Travis..

 

[rebel_horseman]

Right and like I said before, 91 was the transition year. 91.5 trucks have intercoolers and the wiring is hit and miss. Dodge still had large amounts of new parts inventory that they still needed to install in the trucks hence the seemingly random wiring differences. 92 and 93 trucks are essentially the same and unless there's an early 92 odd ball, all 92s ought to have the wiring.