It is attached in the engine on the driver side wheel well, retangular black box about 2 inch wide and 6 inches long
If it is the same as the ( 1996 ) Ford Bronco : In the Power Distribution Box ( which is " live " ) located in the engine compartment ( Relay # 2 is the fuel pump relay )
where is the fuel pump relay for a 1991 Honda accord located
If it is the same as the ( 1996 ) Ford Bronco : ( Relay # 2 is the fuel pump relay )
where is the fuel pump relay located on a 1991 ford econoline 250 van
If you follow the fuel line from the fuel tank to the engine, you will find the fuel filter.
That other relay should be the AC compressor relay.
In the tank
Your 1991 Mercury fuel pump relay switch is located on the firewall of the engine compartment. The relay switch will be near the center of the firewall.
The 1991 Dodge Stealth fuel pump cutoff relay switch is located on the firewall in the engine compartment. You will find the relay switch on the drivers side of the engine compartment.
The fuel pump relay is under the drivers side of the dash , right by the steering column.
The fuel pump relay on a 1991 Mercury Capri is located under the dash, near the main fuse panel. It controls when the fuel pump operates and provides power.
It should be on the driver side fender... 2nd relay back.