I have a tach from my 1991 GMC 350 V8 pickup. It is one of those little SunPro tachs, I believe. Is it possible to hook this up to the plug under the dash? If so, how?

I have yet to find the plug. Not because I can't find it but because of a lack of looking for it.

How many pins are in this plug? What are the functions of the wires? What wire does what?

Sorry I dont have any more info on the tach.


Pat

 

TO my knowledge the isspro tach is the only one that will plug in under your dash and you have to buy a box that plugs in under the dash and goes to the tach.

 

gas tachs are not the same as diesel tachs. so it wont work.

jiMMy

 

HMMM... There's an idea. If you could replace the numbers on the dial with 1/2 the values, 8 to 4, 6 to 3 etc... so that an 8000 rpm tach goes to 4000 instead and then did the electronics to get it to register it would be OK. I am an electronics engineer so I could probably figure it out but it would probably cost you as much to do it that way as if you'd just bought a diesel tach to begin with.

Edwin