Electrical problem
1988 Ford F150 6 cyl Four Wheel Drive Automatic 180000 miles

i have an 88 f150 that i cant get power to the fuel pump i have changed the fuses and the relays and checked the inertia switch i can use the test harness at the relay and ground it out and have power that way so i know there is no problem with the wiring from my fuel pump to the front of the truck can someone please help

the pump is grounded near the pump(black wire) to chassis .. (pink/black) wire goes to inertia switch then carries on (brown wire)to fuel pump relay .. relay is grounded from EEC module (electronic engine control) which gets it's signal's from ECU/PCM check wiring from EEC module (tan/light green) wire from relay to EEC module.... (red) wire from relay goes to fuel injectors