I have a 82 Brat that i've been restoring. One of the problems it had was a knocking sound behind drivers seat, was told its the fuel pump making noise. So i replaced pump with a simple 12 volt replacement pump, was not the subaru OEM replacement. Car has sat since september when i pulled trans to swap in a five speed. also replaced distributor. Now the work is done and after trying to start found no fuel getting to carb, can't hear pump running, tested and no power.

I have poor info, the repair manual is useless, the electrical diagrams don't match my car. I've learned the pump starts based on the ignition switch position or alternator spinning after it starts. Also found a rev sensor under dash but it seems I'm having trouble tracing wires and matching the colors thru out vehicle. What i did find was one wire with same colors as pump pigtail going to regulator and a pair of wires matching the other wire on pump connecting to rev sensor. So confused, and without good electrical diagrams. Any ideas

Maybe try hardwiring the pump to another battery?

On my sube i bypassed the ecu and just ran the wire from the pump relay directly to the pump, so it is on all the time with the switch in the on position.