aolitesnsirens
Junior Member
- Joined
- Feb 16, 2026
- Posts
- 17
- Reaction score
- 12
- Location
- Acton
- First Name
- Geoff
- Truck Year
- 1977
- Truck Model
- K10 Cheyenne
- Engine Size
- 5.7l 350 cu in
Hey fellas, need some help with my 77 K10 stepside. I'm trying to trace down the power for my fuel transfer relay switch under the truck. It had power at one point and was working fine until I noticed I was not using fuel from one tank. I first thought it was the new transfer relay switch I installed, so I returned it and got a new one. That one worked for a while until I had the same problem. So I decided to check if it was a power issue and sure enough it was. I can't seem to find out where the power is coming from so I thought I'd come here for some advice. I already checked the fuses under the dash and none of them are blown. Any help would be appreciated.
