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i would think if it were the relay you wouldn't hear the pump come on. I would unhook the fuel line just past the fuel filter. turn the key on long enough to see if the pump is pumping and is it getting past the filter. if it is you can rule out a possible clogged filter and you know the pump is pumping. I would then start looking for a clog. or locate the relay take it to the part store and get a new one. the problem is the relay only relays electrical signal to the pump that turns it on and off etc it doesn't tell it to pump or not pump gas so if you can hear it running it's not the relay
This is most likely due to the washer pump going out. I just replaced mine on my 2000 cherokee. There is a front and back pump which is located under the drivers side fender. You will have to remove the plastic corner bumper to get access to the pumps. This is an easy job to do yourself. Dont forget to have something ready to drain the fluid into when you remove the pump from the washer tank. The front pump is located below the rear pump.
yes there is a relay for the fuel pump!! the best way too tell if a pump is working is to have someone to turn key to on while another person puts there hand on bottom of tank. if it works you will feel the vibration from pump. the pump only is on enough to pressurize fuel system about 2 or 3 seconds. when car is started it runs constantly.
yes. Depending on where your fuel filter is located, you can disconnect the fuel line at the fuel filter and then try to crank the car over. If it spits fuel out of the disconnected line your pump is working, if not then it's bad. Another way to tell, but not always is when you car is started you hear a high pitched whining sound from the tanks. This is usually (again, not always) an indication of a fuel pump about to fail.