Hello, and thank you for choosing Just Answer!
With 7.5 DCV, you might look for loose connections or a low battery.. Loose connections get hot.
The easiest way I know to help you is to show you the wiring diagram for it. and you can go from there. Because with wires cut, and yu changing the harness and all... there is just no telling what all you got going on in there.
If you know the pump is not getting power, then here is the diagram:
Another thing... If the engine is now carbureted, you will need to install a fuel pressure regulator on the system, because the carburetor is only designed to have 7PSI fuel pressure, and the pump puts out close to 2 times that, and could cause problems with the float...
I gave you the wiring diagram of the system.. Just find out where the 12 volts drops to 7 volts, and you have found the problem.