The fuel pump emergency cut off is located on the passenger side floor board under the carpet, up by the firewall near the heating ducts towards the center of the vehicle. It is a black box about the size of a pack of cigarettes with a red button sticicking up, all you should have to do is push the button back in. If that doesn't fix the problem I would look at the fuel pump relay in the engine compartment.
passenger side where the carpet meets the side panel , behind the panel
There are images available online to help you see where the Fuel reset switch on a 1986 Ford F150 is.
It is located on the toe-board to the right of the transmission hum in the passenger side foot area.
Clogged fuel filter, defective fuel pump are 2 possibilities.
left framerail under drivers seat
look on the driver side firewall by the brake pedal
On a 1992 Ford Bronco : The electric fuel pump is INSIDE the fuel tank
I believe the tank size is 32 gallons.
how do I replace a fuel pump on a 1993 Ford Bronco 302 5.0 L
The fuel injected models do
In 1986 fuel injection was introduced, and the 2.8 was dropped for the 2.9L E.F.I which was a huge improvement. Your Bronco II spec'd 140 h.p. in 1986. Hope this helped. -- Boost
The fuel pump reset switch for a 1990 Ford Bronco II is typically located in the passenger compartment, near the right side of the vehicle, often under the dash or behind the kick panel. You may need to remove a panel to access it. The reset switch is designed to cut off the fuel pump in the event of a collision or fuel system issue, so be sure to check it if you’re experiencing fuel delivery problems.