View Single Post
Old 08-15-2017, 11:07 AM   #13
damnyankee36
Registered User
 
Join Date: Sep 2002
Location: Alamogordo, NM
Posts: 330
Re: Installed '90 GM Factory EFI tank, '72 Blazer Factory gas gauge is pegged past fu

Yes, you ground that terminal. There is "power" there, but it is after the coil in the gauge. It's the same thing as having 12 volts on one end of a relay coil and grounding the other end to energize it.

Look at the attached pic. You can see how each end of both coils are connected to 12 volts. The one on the left is already grounded. The right one is attached to the sender which varies the resistance from 0-90 ohms. 0 ohms being "ground."
Attached Images
 
damnyankee36 is offline   Reply With Quote