Anonymous Posted on May 24, 2009

I can get power th the fuel pump when i run a hard wire from the battery to the relay but when i put the relay back in no power to the fuel pump

I can get power tp the fuel pump only when i run a hard wire to the relay terminal but when i put the relay back in no power to the fuel pump

16 more comments
Anonymous May 24, 2009

yes i swaped the relays out and used a different relay
Anonymous May 24, 2009

wher can i find the sensors at wher can i find the sensors at
Anonymous May 24, 2009

where is the relay switch located where is the relay switch located
Anonymous May 24, 2009

i already tried using a relay that is good please read everything i have tried already thanks
Anonymous May 25, 2009

the thing is i dont hear the fuel pump at all unless i run a hard wire from the battery to the relay other wise no sound at all from the fuel pump not even for one second
Anonymous May 25, 2009

no when i hot wire the relay the fuel pump gets power but does not start up
Anonymous May 26, 2009

and yes i checked all the fuses in the entire van and i replace the fuse to the power box
Anonymous May 26, 2009

i checked the socket relay and the connection th the relay why do you think i can get powerwhen i run a hotwire but it wont start i have a manuel
Anonymous May 26, 2009

yes it cranks yes it cranks
Anonymous May 26, 2009

sorry i have done that already when i reset the emc switch any thing else
Anonymous May 26, 2009

yes i have a pcm and i know where it is located what about the camshaft sensor or the crankshaft sensor?
Anonymous May 26, 2009

and there is a ccrm i have both and there is a ccrm i have both
Anonymous May 26, 2009

the check engine light does not come on
Anonymous May 26, 2009

no i dont have one no i dont have one
Anonymous May 26, 2009

well thanks anyway your the only to try to stick with me it will go to the shop in a couple of days and they will figure it out and i will not be happy after all the work ive done im a pretty tuff woman but this one has got me baffled
Anonymous May 26, 2009

i dont know if the switch is bad when i get my son off to school in about a hour i will check it out thanks
Anonymous May 11, 2010

Sounds like a sensor problem. Sounds like a sensor problem.
Raymond Ramirez May 11, 2010

Have you tried replacing the relay? sometimes the same realy is used for the lights and air conditioning. you can swap only for verifying if the relay is bad. Let me know

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Raymond Ramirez

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Posted on May 25, 2009

Raymond Ramirez

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I have a question. Turn the ignition on you should hear the pump for about 3 seconds. then it should stop. this is normal operation. then when a signal is sent to the ignition that you are going to crank it then it switches on. I can see how this can seem like the pump is not working but after you crank it you should be able to hear the pump for about 1-1.5 seconds after the crank then it will stop. The pump will not turn on until it is told to do so by the computer.

10 more comments
Raymond Ramirez May 25, 2009

the power to the relay is not there. did you check the fuse box for the power to the unit. When you hotwire up the fuel pump is the vehicle able to start?
Raymond Ramirez May 25, 2009

the power to the relay is not there. did you check the fuse box for the power to the unit. When you hotwire up the fuel pump is the vehicle able to start?
Raymond Ramirez May 25, 2009

the power to the relay is not there. did you check the fuse box for the power to the unit. When you hotwire up the fuel pump is the vehicle able to start?
Raymond Ramirez May 25, 2009

the power to the relay is not there. did you check the fuse box for the power to the unit. When you hotwire up the fuel pump is the vehicle able to start?
Raymond Ramirez May 26, 2009

your troubleshooting is very good. I know you are wondering if the socket for the relay may be bad. everything is pointing to this or the connection from the fuse box maybe in question. I do not have have the haynes manual for your vehicle but I am sure you are on the right track my friend. Does the fuel relay socket pull out of its mount. can you use a multimeter to check the voltage at the mount
Raymond Ramirez May 26, 2009

do you think it maybe not being told to turn on...Hummm. I think we can solve this especially since you seem very mechanically savvy. Lets see .... try this. When you rturn the acc on does the engine even crank?
Raymond Ramirez May 26, 2009

This is not a relay issue. The fuel pump relay is not being told to turn on. lets try something...Have you disconected your battery power? lets try to reboot the computer this way. you will have to wait for about 3 minutes after you remove the cable as to allow all power to drain out of the computer capasitors.
Raymond Ramirez May 26, 2009

ok... no check engine light? ummm nuetral position switch on the tranny. wait wait wait... Do you have have a PCM or a CCM

It maybe the PCM power relay. The toughest part is finding out where the thing is located. Be warned this is different from PCM relay that is in the fuse box. On 3.8L engine, PCM power relay is located below the air filter box sometimes. Other models have it between the battery and fender. It is screwed on with four star shaped screws which separate the unit into two things; one side has some gears and coils, the other side has computer circuit. The one with the computer circuit is the PCM power relay. pick it up at a junk yard for $12. it maybe alot more expensive new.

it might be called CCRM (Constant Control Relay Module), and it looks different than the newer one. In my experience a simple way to diagnose this issue. When you turn the ignition to ON position (without turning the starter,) "Service Engine Soon" light should illuminate. If that is in fact the case and the car doesnt start, there is something wrong with the fuel pump.

If "Service Engine Soon" light doesnt come on, but all other panel lights come on, then PCM isnt sending power, and most likely PCM power relay is the problem.
Raymond Ramirez May 26, 2009

try and do the last diagnostics I explained. so we can see if the PCM
Raymond Ramirez May 26, 2009

lets see if the service engine soon light stays on. I think there is a procedure that we can do without using the diag tester. not unless you have one.
Raymond Ramirez May 26, 2009

camshaft sensor or the crankshaft sensor. The only thing is that when the crankshaft sensor goes bad it normally will take out the camshaft sensor. This is one part I would not suggest from the junkyard. you have troubleshot this thing to death my friend. if the crank is not sending the signal to the computer it is not going to let the fuel turn on.

try this site

http://www.ford-trucks.com/forums/202004...

I think you are on to something on the sensor. I wish I had an OBD reader I can let you use.
Raymond Ramirez May 26, 2009

I thought about this lastnight. The inertia fuel shut-off (IFS). This is the emergency fuel cutoff switch the one that you reset. do you think this maybe bad?

I feel bad because I know you could probably repair it yourself and save the money

Anonymous

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Posted on May 24, 2009

Anonymous

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You need to replace the relay switch. About $17.00 from your local Ford dealer. This will be a dealer item only.

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I have an 03 lesabre. Only 5 volts at the fuel pump connectors but 12 volts at the relay.

It sounds like you have done some troubleshooting on your own and have determined that there is a problem with the power wire to the fuel pump. Running a new wire from the fuel pump power wire to the relay is a good solution if the original wire is damaged or burnt out.
Before connecting the new wire to the relay, it is a good idea to test the fuel pump by running a wire from the battery positive terminal to the fuel pump power wire. This will ensure that the fuel pump is working properly.
Once you have confirmed that the fuel pump is working, you can connect the new wire to the relay. It is important to connect the wire to the correct pin on the relay. In this case, you should connect it to pin 87, which is the power output pin.
It is also important to ensure that the wire is properly insulated and secured to prevent any electrical shorts or damage. Once the wire is connected, you can test the fuel pump by turning the key to the "on" position and listening for the fuel pump to engage.
If everything is working properly, the fuel pump should only receive power when the key is turned on, and the new wire to the relay will provide a reliable power source for the fuel pump.

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I suspect the fuel pump circuit is drawing to much power. Do you have something else hooked into those wires(Audio equip?) The fuse is there to protect the relay. Have you put a bigger fuse (bigger number) in there to keep it from blowing the fuse? If not I suspect a bad fuel pump or a stuck fuel pressure regulator(Causing the pump to work too hard- drawing more electrical power) Just remember, its hard to put the smoke back in once it catches fire.

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To Jerry Ross this is angel u said 4me to put a hot wire from my battery to my fuel pump relay.bcz my grey wire don't have power my ?is to what cable?orng,blk,grn or grey?thnx

Angel, is the wire from the relay to the pump in the tank a gray wire? If this is a GM car or truck, the pump wire is almost always gray. So if you are testing if the pump works with putting battery voltage there at the relay, you would put the jumper wire into the terminal with the gray wire. If you look at the relay, there is etched on a side of it the relay explanation of the terminals. The power side is usually designated terminals 30 and 87-one is the power feed to the relay, and the 87 numbered terminal is usually the power out to the fuel pump. The other two terminals form the coil side of the relay- see the little coiled wire designation on the relay schematic? this is the signal side or coil side of the relay, don't put battery voltage into this side- you could fry the computer. If your relay has one other terminal, designated 87A, this is a test terminal for the fuel pump. A single wire connector is in the engine bay somewhere for a tech to hook up battery voltage to test the fuel pump circuit from the relay to the pump. You are doing the same thing with your jumper wire.

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Help... I have a 92 350 chevy truck that will not start. I have replace the ECM, coil, ignition mod., the fuel pump relay and the fuel pump. When i turn th Ignition switch on th fuel pump doesnt come on....

You said you jumped the wires for the pump? Was that at the pump relay?
If you have a voltmeter or test light, keep the jumper wire in place and check for voltage at the fuel tank connector. The pump wire will be gray. With relay out and jumpered there, you should have battery voltage at the fuel tank connector. The key doesn't even have to be on, cause the relay has voltage to it at all times. If you jumpered it right (terminals 87 and 30 on the relay), and no voltage at the tank connector, you have a broken fuel wire somewhere between the relay and the fuel tank.
If you do have voltage at the tank, but the pump still won't work, only two possibilities, a bad pump or the ground for the pump is lost. Check the pump ground first.

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May 23, 2017 • 1992 Chevrolet K1500

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How to hot wire fuel pump for 97

How to
Hot Wire Your Fuel Pump With a Relay in the Trunk

Terry Littleton - t[email protected]

You Will Need

Get 15 ft 10 gauge wire, 3 ft 14 gauge wire, and a Bosch 4 or 5
prong 30 amp relay. Any place that installs car alarms should have a Bosch
relay. Get a heavy 10/12 gauge wire 30 amp fuse holder. They can be found at
auto parts stores and come in the old glass or new plastic spade type fuses.
Make sure it is heavy wire and not like most that use like 14/16 gauge wire. You
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and 1-14 gauge ring connector. Soldering gun, wire
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Procedure

Disconnect battery. Put a ring connector on one end of the 10
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ten gauge wire that you will run to the back of the car. I put mine inside the
car and it was actually easier.

Run it through the hole next to the powermaster where all the
wires go through the firewall. I routed it over behind the emer brake pedal,
down behind that kick panel, took off the sill plate and put it inside the
plastic wire protector (it does come open, just a pain to figure it out). Take
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to mount the relay. I had a radioshack relay but it broke so I got a
Bosch
and it seems a lot sturdier. Good choice.

Just a word of caution. Follow the wires down to the side of the
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It looks like bare copper wire but is actually coated. The coating is so hard, a
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The ground wire from the relay (a small piece of 14 gauge from
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Run the remaining heavy gauge wire from the "Power Out" prong
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The 3 wires going to the sender/pump are Black-Ground,
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protector and splices into the other fuse wire from the
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copper colored wire in the trunk like I mentioned above.

Hope this isn\'t confusing. I did it this way to keep things neat
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I have a 1996 yukon 4 door it wont start thought it was the pump becuase i didn't here it dropped the tank and checked it by running wires to it and it works checked the wires and there is no power spayed...

You did that the hard way
If you had a wiring diagram,you could have started anywhere in the fuel system,checking as you went,until you had no voltage drop.
You could also have found a place, to put power to the pump, without removing the tank
There is a fuse,relay in most cases,fuel pressure regulator,etc in all vehicles. Have to know where and what to test.
Your working blind with no print of a system, your not knowlegable of.

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Oct 03, 2010 • 1996 GMC Yukon

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Fuel pump will not run, 96 Neon 2.0 SOHC

Personally I wouldnt bother tracing the wire as it is probably not worth your time, and just run a constant 12v from the battery to the relay on like 10ga wire. There is probably a short somewhere in the system which can be a real headache to find.

Also it may sound dumb, but check your fuses, and the fusible links under the hood. Chances are that they are all fine though, especially if you have dash lights.

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Dec 30, 2008 • 1996 Dodge Neon

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1998 Windstar

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I have an 03 lesabre. Only 5 volts at the fuel pump connectors but 12 volts at the relay.

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I can get power th the fuel pump when i run a hard wire from the battery to the relay but when i put the relay back in no power to the fuel pump