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Youtube must have thousands of them, well hundreds anyway. Well, a whole lot anyway. One probably like or similar to your '89 model.
Pretty sure you have to drop the tank to replace pump. In later years, makers began putting access panels under the rear seat or trunk area to access the fuel pump assembly, without removing the gas tank.
Broncos are known for bad fuel pumps in the tank. Hopefully you do not have a full tank of fuel and will be able to drop the tank fairly easily. Please use a jack when lowering the tank as someone could get hurt. I myself cut a door in the floor of the cargo area to access the fuel pump without having to drop the tank you will see once dropping the tanks how this could definitely come in handy in your near future.
have fuel system checked...could be that fuel pump has failed....try this ...1.Turn key on but do not start just until you have power.listen for humming noise in the gas tank,it will only humm a few seconds so you may have to listen more than once.....best to have someone stand at the gas tank to listen also.....after trying ywo or three times and you here nothing then this would indicate fuel pump is not working....First check fuse to pump and relay to pump and if ok then replace fuel pump.....
the fuel pump is only designed to run until it reaches a preset pressure. once it reaches that pressure it turns off. One way I know to check it without dropping the tank is to remove the fuel filter. Put the fuel line in a gas can so you don't get gas all over. turn the key on if the pump keeps pumping fuel then it's not the problem. at that point I would buy a new fuel filter because it may be clogged and the reason no fuel is getting to the engine and they are inexpensive and a good idea to keep changed anyway.
if you just filled it with gas it may be your fuel pump. believe it or not when you fill the tank sometimes the pump goes. turn the ignition to ON without cranking it and with all accesories off. Listen for a whir or humm sound-if you dont hear the sound your pump is not working.
The fuel pump is actually inside the gas tank. So unless u want a big hole in your floor board i would disconnect fuel lines and wires to the fuel tank. Remove screws, and ground strap from the filler area. My luck I always have a full tank of gas when the fuel pump decides to go out.. Full tank of gas over your head is not much fun. anyway try to avoid dripping gas, and your ears.... Trust me i know hurts like no other....
There is usually a screen strainer inside fuel tank. This is to pick up big stuff inside tank and keep it from entering fuel lines. If someone was messing with you and dropped like a glove or piece of cloth into the fuel tank it would float around and eventually get caught against the screen and would keep gas from being sucked out of the tank. This is one possibility to consider.
Need to listen for fuel pump humm for proper operation. Shoud humm for about 3 seconds with key turned in the on position. Humm will sound from gas tank where the pump is located. If it does not humm. possible Faulty Fuel pump relay or pump. It will need ferther diagnosis.