A wiring diagram of a 1989 Bronco 11 fuel pump can be purchased from most auto parts stores. It can also be found in do-it-yourself repair books for a 1989 Bronco 11.
On a full sized Bronco, it is located in front of the fuel pump between the frame rails near the drivers feet.
In a chiltons auto repair manual. You can get at your local library
Change fuel filter add a bottle of gas and injector treatments will
On a 1992 Ford Bronco : The electric fuel pump is INSIDE the fuel tank
IF GAS I NOT SKY HIGH
look on the driver side firewall by the brake pedal
how do I replace a fuel pump on a 1993 Ford Bronco 302 5.0 L
I don't know where you can get a diagram but Ford has some recalls out on duel fuel tanks. Check with a dealer yours could be covered.
On a 1989 Ford Bronco II, the fuel pump relay is typically located in the engine compartment's fuse box. It's a small rectangular relay that controls power to the fuel pump. If you're having trouble locating it, refer to the diagram on the inside cover of the fuse box for specific relay identification. Always ensure the vehicle is off and the battery is disconnected when working with electrical components.
If it is the same as the ( 1996 ) Ford Bronco : ( Relay # 2 is the fuel pump relay )
go to your closest auto parts store and buy a haynes manual for your model and year bronco , wiring schematic is in rear of book