DID YOU TRY HELMS BOOK THEY WILL HAVE IT FOR SHURE

http://www.helminc.com/helm/homepage...fp-t-500&x=wrt


I HAVE A HELM FOR MY 84 AND SHOWS EVERY THING,,

CHECK THM OUT

 

WHAT IS THE TACH WIREING COLOR OFF THE PRONGS ON THE 84 ?
PETE

 

i dont think this will help my dash is a LCD,,,LOOKING AT THE CHART THE WHITE WIRE IS THE TACH INPUT...YOU NEED TO BUY A HELMS ELECTRIC TROUBLESHOOTING SHOP MANUAL SUPPLEMENT FOR YOUR CAR HAS ALL ELECTRICAL YOU NEED

 

ANYONE KNOW THE WIREING FOR A CORVETTE ELECTRONIC TACH? I CHECKED MY COUSINS HELMS BOOK FOR HIS 75 VETTE AND NOTHING ON ELECTRONIC TACH.
PETE

 

There is a 3 pronged connector on the back of the tach.

Prong 1 = Pink = 12VDC +
Prong 2 = Black = Ground
Prong 3 = Brown = To distributor

Looking at the tach from the rear the prongs are placed

Prong 1 Prong 2

Prong 3