Rev gauge install in a diesel Surf..

[hiluxsurfer]

My rev counter in my surf has given up and no longer works and I want to know how do I go about installing an aftermarket Speco one. The engine is the 2.8. Am I able to use the existing wiring behind the original cluster and extend it for the new gauge? The truck is a 1985 Surf, or do I have to feed it off somewhere like the alternator?

Any help would be hugely appreciated. Dan.

[smurf182]

I think you'll need a special diesel tach that is designed to take a signal from the alternator.

http://www.toyotadiesel.com/forums/showthread.php?t=3554