Diesel Bombers - 1997 K3500 Orange/black and orange wires to left side GP Relay

Diesel Bombers (https://www.dieselbombers.com/)

- Chevy/GMC 6.2L and 6.5L (https://www.dieselbombers.com/chevy-gmc-6-2l-6-5l/)

- - 1997 K3500 Orange/black and orange wires to left side GP Relay (https://www.dieselbombers.com/chevy-gmc-6-2l-6-5l/134396-1997-k3500-orange-black-orange-wires-left-side-gp-relay.html)

1997 K3500 Orange/black and orange wires to left side GP Relay

Truck will crank and crank but will not start. It did run last week after almost draining the batteries.I have 12 volts power to the right side of the new glow plug relay but with ignition on no power
to the left side. I checked the fusible links on the left side of the glow plug relay and they are good. Wait light comes on but no clicking at GP relay.

I have the code P0380 Glow Plug circuit A. Where does the orange black wire come from and what about orange wire that goes to the left side of the glow plug relay?