There are two main relays. Pop your hood, Look directly to the right of your Break master cylinder and located on your firewall you should see two black relays with separate wire harness attachments. Relays rarely go out so, check your fuses and power to your fuel pump.
The fuel pump rely is located in the trunk in the compartment in between the rear speakers a small black rubber plug.
where is the fuel pump rely on a 2005 f150 with a 5.4
For a 1999 Mercury Cougar : In the Power Distribution Box ( which is " live " ) located in the engine compartment ( on the drivers side of the engine compartment ) ( relay R1 is the fuel pump relay )
In a 1999 Mercury Mountaineer : In the Power Distribution Box ( which is " live " ) located in the engine compartment , on the drivers side of the engine compartment ( relay # 5 is the fuel pump relay )
i have also replaced the throttle body with the fuel injectors the i have tested the fuel rely and it does work
On a 2001 Ford Expedition : In the Power Distribution Box ( which is " live " ) located in the engine compartment ( on the drivers side of the engine compartment ) ( relay # 301 is the fuel pump relay )
Relay is located up under dash on driver side. remove old rely, install new
Need to know what year S10 you have to tell you where the fuel pump relay is.
There could be a few reasons but here is what to me on my 89 s-10 blazer..1st real simple there is a ground wire from the access hole on the tank to a grounding screw(mine was above the tag lite) that's the simplest easy to find reason check for the fuse the runs the pump,there is also a fuel pump rely under the hood,the pump is bad and its in the tank not as hard as you may think just a pain in the ***.but first ck all the electrical then replace the pump they are only about $40. if you do but a bunch to get it done good hunting.
it will be a rely and will be under the hood
Either the pump is bad, or there is a short in the power wire somewhere. Sometimes you have a bad fuel pump rely too.
Under the hood at the fuse/relay center.