I have a 2001 ford ranger. How do I know if the fuel relay is bad or the fuel pump?

well all cars with many engines are not the same even by country sold to first. (market) edge is trim stuff, not fuel or engine related !
so I guess you google facts and read about other, rangers not yours.
wrong year,or wrong engines on their car makes answers dead wrong
so learn to read only your service manual for your car only 4.0L
one can read the manual and tell it what engine is there.
and is really a 2001 first time used.
4.0 L 4.0 SOHC V6 (gasoline) (SOHC is new) and unique this GEN.

https://eautorepair.net/Marketing/Default.asp



shop manual show 4 fuel pump schematics for 4 engines.
so scan the PCM yet see pump or fuse errors? scans are first

facts about pump , SOHC 4.0L in the manual
2 fuses
f1.17 main BJB
F2.19 , CJB
these pair run injectors.
now pump
wow 46 pages on engine controls (schematics)
page 24 is pump found it. 4.0L
fuse 1.23 blown
Fuse 1.7 is first.
PCM power relay good feeds pump relay
the pump relay feed the pump crash inertial switch then to pump.
last is pump g205 ground. not bad

so only 2001 AND 4.0l AND SOHC GETS YOU TRUTH NOT OTHERS.


THE RELAY IS IN THE BJB, BATTERY JUNCTION FUSE BOX.
BOTH ARE ABOVE.

Fuel shut off switch may need to be reset. A friend of mine had it trip when he had a flat tire some years ago on ford car. The reset on his was behind the plastic piece to the right of where the video below. Video below shows fuel shut off/inertia switch on upper floorboard passenger side.
Inertia Switch Explained Removed and Replaced 98-12 Ford Ranger - YouTube
2002 Ford Ranger Fuel Cutoff Switch - YouTube
You can try swapping out your fuel pump relay to make sure the relay is not bad. Below link may help
1999 Ford Ranger Fuel Pump Relay, Fuel Pump Fuse & Starter Fuse Location - YouTube

Ford Ranger ? ramger ! What engine ? 4.0 l , 3.0 l , 2.3 or 2.5 l More then likely it's in the under hood fuse / relay box . relay K-4

Three wires - the dark green with yellow stripe comes from the fuel pump relay ! When energized the relay sends battery voltage to the inertia switch via the dark green with yellow stripe wire . Inertia switch's don't go bad ! What's the problem ? fuel pump not working ? Test from the relay > Do you know what a relay is and how it works ? Watch this guy's video ! He shows chrysler first then ford . Do you know how to do electrical testing ! It doesn't matter that your inertia swich has three wires . Only two matter ! Fuel Pump Electrical Circuits Description and Operation

The engine computer must be working to get spark and fuel injector pulse. I would want to know if the computer has power and is functional. The computer grounds the EEC relay and the fuel pump relay as well as the injectors.

Click on link to see fuel pump relay's location.http://www.rangerpowersports.com/forum/f329/2001-ford-ranger-fuel-pump-relay-location-199081.html

Have you checked the relay to see if the pump is getting voltage ?
If the pump is running, did you change the filter ?
Have you checked for fuel pressure at the injectors ?
Are you getting spark to the plugs ?

I would suspect a bad eec relay. These used to go out commonly, and the eec relay is what powers up the fuel pump relay.

they are listed in your owner manual. or go to motorcraft.com, procenter, tech info, owner manual.

fuel pump relay is 46A

4 relays in bottom left corner. it is lower right of the 4.

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