While out for a sunday cruise in my 65 gto i suddenly noticed a serious flutter in the original rally gauge tachometer needle. I first tried the low output green wire and then the high output off the side of coil.

File 68 Gto Tach Jpg Wikimedia Commons
Gto hood tach wiring diagram. One of the black wires and the brown wire have an eye loop connector at each end. While that may be true wiring systems are still a point of fear and loathing among many restorers of pontiac gtos and other muscle car era machines. The remaining black wire has no connector. There are three wires 1 2 black 3 black with red stripe answered by a verified classic car mechanic we use cookies to give you the best possible experience on our website. Use the enclosed. I wired up tach and it lights up and the needle goes to about middle and moves a small amount when rpms are increased.
I have a 68 gto im trying to connect the hood tach. Httpsamznto2rirmf9 thanks for watching. The tach has a 3 prong male connector coming from it the female connector i have has three wires. I am installing a hood tach on my 71 gto. And one of the diagrams on pages 3 4 or 5 being certain to follow the proper diagram for your application. I bought a 68 gto that has a msd 6al and a 8920 tach adapter.
Tha tach is an aftermarket hood tach that he bought from original parts group kr00152. 1967 gto hood tachometer wiring diagram in addition technical info also 1969 pontiac gto vacuum line diagram in addition ford ranger tachometer wiring diagram in addition 1966 gto wiring diagram as well as 67 gto tach wiring diagram along with 1968 pontiac gto hood tach wiring diagram furthermore 1967 gto horn wiring diagram in addition 69 gto. Up to the negative post on the coil and to the tach terminal on the tachometer without ever using a secondary 12 volt fused. That little yellow pointer which has given so many years of. Basic steps wiring diagram and part numbers used while installing gto hood tach. My questions are do i have the right adapter and is there any way to tell if a tach is a voltage or.
The way he has it hooked up appears right for a voltage triggered tach but it does not work. The wiring systems of the 1964 1974 pontiac gtos are probably closer in complexity to a model t ford than anything currently in showrooms. I have an msd digital hei kit 8501 installed in my 1970 gto. 1 brown 2 black. Just a little video i made to help you understand the way a tachometer should be wired. The truth is it.
I think it is year one or opg not sure. The lights on the tach work so there is power. I have a reproduction hood tach from about 10 years ago.