Corvette Forum : DigitalCorvettes.com Corvette Forums banner
1 - 3 of 3 Posts

·
Registered
Joined
·
676 Posts
Discussion Starter · #1 ·
I've acquired a 75-77 tach for a future conversion over to electrical instead of mechanicl. However I'm not sure of the input designations for +12 power, ground, and tach signal.



#1 = ?
#2 = ?
#3 = ?

Thanks,
Jeff
 

·
Registered
Joined
·
676 Posts
Discussion Starter · #2 ·
By using a 9v battery, the only way I could get the needle to move was #1 = +9v, and #2 = ground.

So that would leave this:

#1 = +12v
#2 = ground
#3 = tach signal
 
1 - 3 of 3 Posts
Top