mlparkey
Junior Member
- Joined
- Oct 28, 2021
- Posts
- 6
- Reaction score
- 5
- Location
- Oak Lawn
- First Name
- Mark
- Truck Year
- 1986
- Truck Model
- C10
- Engine Size
- 5.7
With key on you should have battery voltage at the sending unit wire at the sending unit. If you ground the sending unit wire and the gage goes to full hot, then the wiring circuit is good. The sending unit controls the ground resistance. Full resistance, (cold), no resistance (hot). Sounds like the sending unit is not grounding.
