1989 Isuzu Trooper Fuel Pump, Injectors, and Blower not wor

The ignition turns on and the starter cranks, but the fuel pump, injectors, and heater/AC blower doesn't work. No fuel comes through the line from the fuel pump. When I pull out the Engine Relay, the blower works, but most of the warning lights on the dash go out. When I plug the Engine Relay back in, the ECM Relay and the A/C Comp Relay click, as well as a relay behind the left front headlight. With the Engine Relay plugged in, fuses # 8-12 do not show current when a tester that is connected to the ground is touched to them. When the Engine Relay is pulled out, they all (four fuses; #9 is blank) show current with the tester. There is a healthy spark if I try touching a bypass hot wire to the connector for the blk/yel wire going to the fuel pump at the tank (with the connection unplugged from the feed line coming from the front). A black wire with red rings on it connected to the Engine Relay is toasted (insulation is melted), and initially fuse number 13 was burned out. All the above symptoms are with a 10 amp fuse replacement in #13.

Any ideas what is wrong, and how to fix it?

Thanks,
Bob

Next day postscript:
Today I did more checking and it seems that the fuel pump is not working and is shorted out, since I get continuity through the two wires coming out of the tank from the fuel pump, and both sides show a grounded circuit(my expectation is that one side shouldn't). There is no noise of the pump running, buzzzing, or anything when the connection is plugged up and the ignition turned on. If the fuel is bad/shorted out, could that have caused the above problems? And since the engine doesn't run, would that in turn keep the A/C blower from operating?