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Why won't the engine turn over?

My son was putting LED lights into his dash cluster and one of them smoked. Now the engine won't turn over. All accessories come on and you can here the fuel pump come on when you turn the key. We jumped the clutch safety switch with no luck. We jumped the number 3 and 5 terminals on the clutch interlock relay and the engine turns over but won't start. Replaced that relay and no luck. I need some help.

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  • Terry Hair Apr 14, 2015

    Glad to see you tried to research the problem. You have done more than many. However, you have failed to give us the critical data we need to help you. The vehicle's year, manufacturer, model, and engine size mean a lot to those of us who work these issues. Otherwise we could be talking about anything from a 1949 Mercury to a 2015 Corvette.

  • David Love
    David Love Apr 14, 2015

    Sorry, that that info showed up I n the title. it's a 2000 Nissan Frontier 2WD with the 3.3 V6

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  • Cars & Trucks Master
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Check all fuses,when installing led lights,did he use an inline fuse?,pretty expensive mistake.

Posted on Apr 14, 2015

  • David Love
    David Love Apr 14, 2015

    We checked all the fuses, he did not use an in-line fuse.

  •  johnny rebel
    johnny rebel Apr 14, 2015

    no inline fuse means,bad mistake!,fried relays,inline fusible links,probably the fusible link on the positive battery cable

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  • Cars & Trucks Master
  • 41,560 Answers

Ya know make and model usually is a good place to start .even the best mechanics need to know what they are working on

Posted on Apr 14, 2015

  • David Love
    David Love Apr 14, 2015

    2000 Nissan Frontier 3.3 V6

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6 Suggested Answers

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Posted on Jan 02, 2017

  • 65 Answers

SOURCE: Ford Escort 1998 fuel pump not working.

good old ford lol, try looking at the crank sensor its located at the front of the engine tucked in right hand side of exhaust manifold and gearbox, two pin plug, i have also known these to have no end of faults with the fusebox.
easy to remove, and solder the connections inside they all suffer eventually, if your not to handy with cars i recommend taking to a auto electrician, easy if you know how. Good luck Davelee

Posted on Mar 24, 2009

Molson02536
  • 3854 Answers

SOURCE: fuel pump problems 2003 s10 chev 4.3 v6

Your ECU is what acctivates your fuel pump realy. Put the key on the run possition and pull the ecu fuse for a few seconds and reinstall it ans it should accivate your realy for 5 seconds, Good luck.

Posted on Apr 06, 2009

daves944
  • 1050 Answers

SOURCE: Buick Regal dying

You have a problem in the fuel pump relay circuit for sure then. I'm betting the relay, but it could be that dropping resistor.

Posted on May 11, 2009

  • 6982 Answers

SOURCE: 1991 camaro RS Fuel pump not working- no power to pump

If the oil pressure switch has two wires on it it may be one that shuts down the pump. I'm not positive but I think it completes a ground circuit, not the hot side though (but may run through a relay.) There should be a pump relay under the hood with a group of other relays. I don't have a wiring diagram for your car but you can get a basic diagram in most inexpensive manuals. They wont usually give you locations but at least you can get an idea of how the system works. There usually is a fuse. If the fuse block is not labeled, use a test light and probe the back of every fuse for power with the key on (takes about ten minutes and faster than trying to find info) change any that are blown. The most likely culprit is a relay, so after testing fuses look for it. (usually on drivers fender or on right side near firewall.) Worst case, trace the power lead all the way through the harness 'till you find where power begins.Testing is important here...I could give you much better info if I was there to do it for you. Most important is to stay "on track" till you find the place where power ends. Don't jump all over the place or you will end up doing an incomplete test.

Posted on Jun 17, 2009

Yuma Duner
  • 5 Answers

SOURCE: Intermittent fuel pump engagement when turning key - 2001 Taurus

try cleaning the connector that goes to the fuel pump, sometimes they corrode on inside. If that does not fix, test the wires feeding fuel pump with a multi meter until the condition shows itself again, if voltage drops to zero or very low then wiring problem, if voltage is unchanged with problem and fuel pump is not working and connectors are all clean, try replacement of fuel pump.

Posted on Oct 09, 2009

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