No power going to the fuel pump - 2005 Mercury Montego

Check that is battery voltage at the pump relay, with the ignition on the relay should click in and there should be battery voltage at the cable going to the fuel pump , If all is correct there check for a broken cable to the fuel pump

fuel pump power can be controlled by the pressure regulator that signals the ECM to turn on the pump relay to power the pump
check further afield from the pump as the problem is else where

check fuel pump relay on firewall passenger side if it has power and power when the key is turned on will click test power through relay to fuel pump disconnect connector at fuel tank make sure you have a good ground test for power at sending unit when key is os or in start if power the sending unit has rotten corroded wire going to fuel pump you will have to remove the fuel tank test power right at the pump if there is no power replace sending unit if power a pump use teslight one end on ground terminal and other lead on power terminal at pump if you have power replace the pump

if this is helpful plz leave a comment like and if you need more help ask once you eliminate pump good luck

CHECK FUEL PUMP FUSE AND RELAY IF BOTH OKAY CHECK TO SEE IF POWER GOING TO FUEL PUMP IF YES FUEL PUMP FAULTY.IF NO POWER GOING TO FUEL PUMP MORE LIKELY FUEL PUMP WIRE HAS A SHORT OR OPEN CIRCUIT.

the crank sensor is most likely the problem. If the PCM does not sense the engine is cranking then the fuel pump will not turn on. Also just because a fuel pump will run does not mean it will pump fuel.. Jump it while its in the fuel tank to see if it will pump. But still when you turn the key on you only have power to the fuel pump for 3 seconds unless you continue to crank. . If you have a 3 second voltage pulse when you cycle the key on, then spray some quick start or brake cleaner. If it now starts and you know the fuel pump has power then the fuel pump needs replacement. If you don't have the 3 second pulse look at the crank sensor as being the problem,

If the fuel pump don't have power it means that, the fuel pump throttle is stuck. just go to a car mechanic and tell them that the fuel pump of your car don't work . if they ask say maybe the fuel pump throttle is stuck , so that the mechanic can do it fast.But if you want to work on it its the fuel pump throttle that you should work on because its stuck

Hi..my name is Keith..and the 2 things that i know of...that will not let power go to the fuel pump is 1..the fuel pump relay being bad..or 2..that something has tripped the Inertia Switch...and it needs resetting..i hope this will help

buy a cheap test light/probe and use that at the fuel pump plug to check for power in that circuit.It could also be a relay thats at fault so check that for power in and power out,same test tool.There are not many wires at the pump plug but as long as only one has 12v its not a power supply problem.Does the car run at all?

fuel pump works fine but gage isn't working any one got any idea?

You can get wiring diagrams from autozone.com -- they have parts of repair manuals online. I have the smae problem but the person I got my 88 fox gl from wired up a switch going to the fuel pump that you have to leave on while driving. I"m probably giong to fix this soon. It looks like the wire powering the fuel pump relay comes from the ignition switch. So if the pump side of the relay is good, but aren't getting power, you may want to see if your ignition switch isn't providing power on one wire, going to the fuel pump relay.