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1997 258 vista four winns no 12 volt at fuel pump relay l

Pump is good relay good no power to coil of pump relay need wiring diagram electic fuel pump on engine 7.4 chevy. Can jump across relay plug with relay out pump will run.

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6ya6ya
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Posted on Jan 02, 2017

  • 393 Answers

SOURCE: Fuel pump relay or emergency engine shut off

something is killing the relays poss fuel pump drawing to much amperage check pump with amp probe is pump noisey?

Posted on Dec 19, 2008

  • 5 Answers

SOURCE: on my 1994 plymouth voyager the 3 wire harness to fuel pump (blue wire) doesn't have 12 volts; should it? fuel pump quit then worked once when hot-wired with 12 volts. fuse and relay is good.

The wire should not be hot until the relay is triggered. The relay does not get triggered until the ignition key is turned on. It will run for 3-5 seconds or until the system pressure it at max.

Posted on Apr 27, 2009

  • 195 Answers

SOURCE: 1996 f150 fuel pump

Hello;
You may have a break in the wire inside the tank to the fuel pump. I have seen the wires disconnect as the pump is installed.
Rich
RPM Northwest

Posted on Jun 10, 2009

co7196
  • 3433 Answers

SOURCE: have 93 chevy s10, stopped and started just fine

Ok, The fuel pump doesn't run installed. Make sure everything ia in place and connected. Then go for the Maf sensor on the air intake duct.. It controls the fuel through the ecu. Have you purged or attempt to purge yhe fuel system with the fuel manifold valve? Try all of the above before diving into wiring.

Posted on Jun 15, 2009

  • 850 Answers

SOURCE: 2000 elantra no power to fuel pump.

could be a bad earth or [ground]
the power wire ma be brocken or have a loose or dirty connection
you neeed to trace it along its lenght to determine the fault!
so start at the pump & work back
Cheers rob

Posted on Jul 20, 2009

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2 Answers

Replaced bad fuel pump. Still will not start. Only 6 volts at the pump relay. Bypassing the relay indicated pump is working and plenty of pressure. Checked all the fuses all are good. Any ideas?


Year make and model ?
You should have two hot circuits to the relay. One is for the pump and the other is for the coil of the relay. Usually power comes from the key switch.

Jan 01, 2016 | Cars & Trucks

2 Answers

No fuel getting to motor so no start. replaced pump fuses and relays all good. there is spark


you will need to check the plug to the pump on top of the tank. check for voltage. then if no volts trace the wires back. also you should check the relay have some one at the relay listening to see if it clicks when you turn the key. no click no volts no volts may be a warn out relay, if it buzzes change it.

Mar 20, 2014 | 1995 Plymouth Grand Voyager

1 Answer

ASK SEARCH HOMEANSWERPROFILESIGN IN Problem with 1988 Dodge Ramcharger 1988 dodge ramcharger 5.2 liter. no fire or fuel.replaced computer and coil still no fire or fuel.jumped 12volts from battery to...


Without a voltmeter and a wiring diagram, you're in a bit of a fix. But I would be wondering why the ignition switch isn't sending power to the coil primary positive terminal, and why it isn't causing the fuel pump to be turned on, too.
Is your check engine light on with key on? The computer should sense ignition is on and briefly turn on the fuel pump through the fuel pump relay, on just long enough to pressurize the fuel line to the injector. But no fuel or fire-you'd better start by checking if the ignition switch has power in and power out, and work your way to the coil.

Nov 21, 2013 | Cars & Trucks

1 Answer

My 1993 E-350 club wagon wont start Code: 542 =


Replace the TCM to fix the converter clutch problem.. The line 12 volt is direct power from the battery and 7 volts out the I am suspicious off as I think that the coil for the relay is partially shorting out to give the 7 volts. As for the other wire 12 volts in would be ok but if there is nothing out unless it is a relay that has not closed because the relay coil has not activated correctly.. Check the readings against a new relay.

Nov 01, 2013 | Cars & Trucks

1 Answer

30amp auto shutdown fuse blows is it alternater


The ASD relay supplies battery voltage (12+ volts) to the fuel injectors and ignition coil(s). With certain emissions packages it also supplies 12-volts to the oxygen sensor heating elements. The Fuel Pump Relay is a separate relay controlled by the ASD relay input to the PCM. Fuse #12 (10amp) provides 12 volts to the coil side of both the relays and the ignition switch. Fuse #6 (30 amps) supplies 12 volts to the output side of the relay. Fuse #16 (15 amp) from the relay output to the Oxygen Sensors and Fuse #26 (15 amp) relay output to the PCM. Fuse #24 (20 amp) is Fuel pump relay output to fuel pump. Fuse #19 (10 amp) supplies 12 volts direct to the PCM.
look for burned or melted wires in the offending circuit.
sounds like you wiggled a wire while installing new relay.

Mar 06, 2013 | Cars & Trucks

1 Answer

G16b no spark efi


The fuel pump relay has four pins. Two pins relate to low power switch circuit from the ECU and the other pins relate to the high current switched circuit which has a permanent power in and switched power out (to fuel pump). Check that the ground on the lower switch circuit pins is good and then check that when the ignition key is in the 'on' position that the low power switch pin has 12.6ish volts supplied to it. If there is no low power switching supply then the relay cannot function. If there is low power supply but no voltage switch on the output then the issue sounds like the relay itself. Pull the relay out and check that it clicks when 12v is dropped across the low circuit pins. Check the resistance across the high current output circuit pins when the low pins are given 12 volts. As 12 volts is applied across the low voltage pins the resistance across the high current output pins should drop to near zero as the internal contacts are closed. As the low side voltage is removed the high side pin resistance should once again register open circuit (infinite resistance). If the relay clicks but fails to output then either replace the relay or open it up and get a nail file and draw it between the contact pins to remove any corrosion.

May 23, 2012 | Cars & Trucks

1 Answer

I have replaced my fuel pump and fuel pump relay and the car(1988 Lincoln Town Car) ran fine for two months. Now it will not start. The fuel pump relay has 4.6 volts when the ignition is on, it is not...


Have to look at a wiring diagram to figure that out

At least I would.

Does the relay energize in your hand,
with batt & grd on coil & ohm meter on
it's contacts, to see if their burnt?

e.g. do you need 12 + volt for it to work

Your looking for a voltage drop ---maybe

Don't rule out the ignition switch it gets a lot of use

Jun 12, 2011 | 1988 Lincoln Town Car

3 Answers

It seems i am not getting any power to fuel pump, replaced pump still no power dont hear pump turn on at key on position check relays but not sure on good or not


Replace the oil pressure switch for the third wire on that sends 12 volts to the fuel pump upon turning the ignition key on to prime. Once oil pressure is achived the computer shuts that circuit off and turns on the fuel pump relay to power the pump till you shut off the engine

Jul 13, 2010 | 1997 Chevrolet S-10 Pickup

2 Answers

1997 dodge ram won't start. My fuel pump does not run and coil won't spark. Iv'e checked fuses and relays and they look fine. Could a bad fuel pump cause the asd to kill power to the coil?


First check any ignition/fuel related fuses. Check to make sure you have 12 volts coming into the pump and coil. If nothing to the fuel pump replace the fuel pump relay - if you do have power to the fuel pump then replace the pump. If nothing is coming to the coil it is either an ignition relay or a wiring issue. If you have 12 volts to the coil but no spark then replace the coil.
Also the fuel pump/relay would not kill the coil.

Jan 21, 2010 | 1997 Dodge Ram 1500 Club Cab

1 Answer

On my 1994 plymouth voyager the 3 wire harness to fuel pump (blue wire) doesn't have 12 volts; should it? fuel pump quit then worked once when hot-wired with 12 volts. fuse and relay is good.


The wire should not be hot until the relay is triggered. The relay does not get triggered until the ignition key is turned on. It will run for 3-5 seconds or until the system pressure it at max.

Apr 26, 2009 | 1999 Plymouth Grand Voyager

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