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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

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  • 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

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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

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

No fuel pressure in efi system


Either the fuel pump is not working, or the filter is totally blocked.
The fuel pump circuit needs checked to see if it's a wiring problem or a failed fuel pump. There will be (probably) a fuel pump fuse in your fuse block, and a fuel pump relay under the hood.
If you check the fuel pump wire for power at the gas tank connector while the engine is cranking over, and there is power there, and the ground for the pump is good, then the pump is not working and will have to be replaced. If you do not have power when cranking, the wiring at the fuel pump relay will have to be checked. Simple relay- has a power feed for the pump at one relay terminal (it is hot at all times), and a fuel pump wire to pump on another terminal (the power out for relay). When relay coil side is energized from a signal from computer, the relay contacts close and power is sent to the pump. The other relay terminal is a ground for the coil side of relay. Pull the relay out and you will see the diagram etched on it. If there is a fifth terminal, that could be a pump prime terminal, or a way to keep the pump running when engine is running through the oil pressure switch. But when cranking the engine, the computer will signal the relay to send power to the pump.

Dec 31, 2013 | Cars & Trucks

1 Answer

2000 ford windstar no fuel changed fuel pump still no fuel changed fuses and relay


Check the power feed for the pump at the fuel pump relay. Pull the relay out, and with a test light clipped to a ground, probe all the terminals that the relay plugs in to. One terminal should be hot at all times. If no terminal has power, either a fusible link off the battery has failed or a maxi fuse has blown-check a wiring diagram to see how the relay gets power to it.
If the relay has power to it, check the other relay terminals with the engine cranking. When cranking the engine, two terminals should have power-the fuel pump feed, and the signal from computer to activate the relay. If both signals are present, check the pump wire from relay to tank, check the fuel pump ground, and check if the coil side of relay has a good ground-signal from computer goes to coil input side, the coil output terminal should go to ground.
Good luck. Post back with what you find.

Oct 17, 2013 | 2001 Ford Windstar

1 Answer

My car will not start it cranks but will not turn on. So far I have changed the crank sensor I also have no spark to coil packs or spark plugs Fuel pump does not turn on when I turn the key. What is the...


Begin by checking fuses. Ignition, efi, fuel pump fuses. When key turned to on, do the warning lights and gauges work? That verifies switch has power and is sending power out. With key on, the coil primary wire to coil packs should have voltage.

No spark and no gas? Fuel pump fuse good? I think I would use a test light or multimeter to check that fuel pump fuse terminal has power to it with key on. If that's good, pull connector off at fuel tank and check for a voltage signal on fuel pump wire when the engine is cranking-if good signal, fuel pump needs taken out for replacement or inspection. If no signal check that fuel pump relay has power to it. With key off, pull the relay and check that one terminal has power to it-the feed wire for the pump. If no power signal at all, check maxi fuses or fusible links for a failure.

Sep 04, 2013 | Cars & Trucks

2 Answers

93 chevy caprice 5.0 new fuel pump changed relay and fuse still can't get pump to work can't even get relay to click checked power to relay and used jump wire to pump prime wire pump works w


If relay worked when placed in another vehicle you must have a wiring problem. trace wires from fuse block to relay checking for corrosion or short.

Jan 12, 2013 | Chevrolet Caprice Cars & Trucks

1 Answer

I need the fuel system diagram for a 1998 Chevy Tahoe w/ 5.7L gasoline engine


Dark green provides power to fuel pump relay from the ECU. Orange wire at fuel pump relay is power at all time and is provide from the ECM/Bat Fuse at fuse block (Left side of dash). It also connects to the fuel pump oil pressure switch. The grey wire at relay provides power to the fuel pump and fuel pum oil pressure switch. The red plug thats tape to harness from relay/fuse center is the prime connector..

Jun 11, 2010 | 1998 Chevrolet Tahoe

2 Answers

1997 chevy silverado 1500 350 vortech, new fule pump not working


before you drop tank again, check fuses & relay.then disconnect fuel line @ filter turn key to on position should hear fuel pump run and get gas stream out of line. if no flow from line new pump faulty be sure & remove negative battery cable first good luck.

Jun 04, 2009 | 1999 Chevrolet Silverado 1500

2 Answers

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?

Dec 19, 2008 | 1993 Mitsubishi 3000GT

1 Answer

Will not start


Most likely it is the ignition module or the crank pickup.

Sep 08, 2008 | 1992 Chevrolet K1500

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