i have a 92 ford e150, 5.0 i just replaced the fuel pump in the tank, next to the battery is 5 sending units, anyone know witch one is for the fuel?
Do you not have a chart on the waterproof cover? A detailed owners manual will spell this out. Are you having problems with power to your pump, now?
Those are relays. There's one for the A/C. One for the horns. One for the headlights. One for the fuel. Pull one and see what stops working. If they are the same, try swapping them.