How can I be sure the fuel pump is bad on my 88 bronco ii?

Check the wires going to the fuel pump relay for a ground with the ignition on. The reay requires a ground sent from the ecu to activate the relay and sent power to the fuel pump.

bad fuel pump

Look at your registration, note "model year" If you ar still unsure, call a Ford dealer and ask them to look up your vin #. They will know for sure.

2 reason
1. your fuel tank is rusty it deliever rusty fuel to your tank
2. your pump motor get jamed or need to replaced thats why it blowing your pump commanding relays..

Well if he caused a short in the electrical system it could be the eec relay it is located on the passenger side under the hood on the fenderwell. Some are marked with what they do there can be 3-4 relays on it, the relays look like a small box with a connector at the bottom, and quite a few wires coming out. the one for the eec relay should be in the middle it was on my fathers 88 bronco 2. the fuel pump relay is the same thing, there cheap to buy and can find them at the parts store they are known for failure, just replace it..

It is located on the right hand side of the vehicle near the firewall. It is part number 9345, adjacent to the engone control housing assembly.

check the tan- lt green wire on the fuel relay that is located on the right fender, mine wasn't pushed in all the way, this wire shut down injectors and fuel pump, if you are looking for the shut off switch to reset the relay, it is on the passagers side floor board under the dash, gas two wires, orange and pink, I don't remember the color of the stripes, I removed this switch and wired them together without a problem

check the fuel pump relay this sends the power to the fuel pump,

also has the car been in a smash even a small one if so the car may be fit with a enersher switch that cuts off the fuel circuit.

recommend you by a repair manual from your local parts retailer for the exact locations of these 2 units

Why would you want to do that? Are you concerned about using your whole tank's supply? If so, forget it. Your 88 Bronco needs the pressure from the pump to properly operate. You could run without it on the highway, but certainly not in town. Don't consider your proposition. It's just not worth it. If all you need to do is bypass the pump to drain the tank for whatever reason, you'll need to remove the pump.

sounds like it could be the relay. also this one has 2 pumps I think, one in the tank LP and one on the rail just under the driver. 2 relays also one for each.