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Anonymous Posted on Jul 24, 2014

Have no power to fuel pump fuse

Tried jumping power to fuse still cant get power to pump

  • Rj Right May 19, 2015

    Check the harness that connects to the gas-tank.
    One can check there for power but is only for a split second when the key is turned on. Do not run direct 12 volts to fuel pump for very long if at all. Check your wiring to your ECM (Computer) for rubbing against the body near where it connects to the computer typically 2 big connectors, check these wires carefully for bulges or weaknesses. Test your crank positioning sensor - all sensors have a specific resistance (ohms).
    Give the gas tank a whack with a base ball bat as someone turns the key to "On" several times, to dislodge any bits of corrosion from the fuel pump in the event the tank ran dry and sucked up bits of rust.
    If this were in the dead of winter water may have gotten in the pump and froze, put gasline antifreeze or warm gas in tank, I have taken a burner from an electric stove, plugged it into an extension cord and placed the buner under the tank on the ground and in 20 minutes she was toasty warm and started right up.
    Best can offer!
    East Coast Canada Rules!
    25 years back-yard mechanic!

  • Rj Right May 19, 2015

    OOps, this could be a security issue or ignition problem, or a fuseable link, or perhaps a wire under the power control center (the box under hood that holds all the fuses and relays.).
    Could even be as simple as a broken ground wire from the body to the engine or battery to the body. Without an obdii tester and some testing and looking around for broken wires this may be difficult to resolve.
    Please leave feedback when you resolve this issue.

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leone C

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  • Expert 182 Answers
  • Posted on Apr 14, 2022
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The immobilizer feature, from the factory security system, if you hot wire it still nothing, check your wiring from the pump to the front, I suppose you can run a wire straight from the battery, bypassing the relay and fuse just to test the pump and narrowed it down the corporate, ECU(immobilizer), fuse, pump relay.see the immobilizer will cut fuel and injectors off.

D. E. Hev

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  • GMC Master 1,187 Answers
  • Posted on May 19, 2015
D.  E.  Hev
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Anonymous

  • 312 Answers
  • Posted on Aug 17, 2012

SOURCE: fuel pump fuse 1989gmcs15

quick fix is set a live from egnition to a fuse carage that will hold correct ampage fuse then other side of fuse carrage to fuel pump then other side of pump to earth ie body pannel this will power up fuel pump

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) Unplug the main relay and then turn the key from off to ON(II).

2) Use a jumper wire or paperclip to jump terminal 1 to terminal 7 in the main relay plug. Does the fuel pump run?

3) Now use the jumper wire or paperclip to jump terminal 5 to terminal 7 in the main relay plug. Does the fuel pump run?


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Whole fuel system

The main fuel pump in a Volvo is really well built and rarely fails (Bosch simply makes great fuel pumps). A good survival trick if you think a main fuel pump might be bad... give it a quick tap with a wrench. For best results, if possible, tap the pump when cranking the engine (while power is going to the pump). If the pump is bad, often the tap will make it come to life and it may stay running until you shut it off. This trick can get you back on the road and get you home in an emergency. If it's a bad fuel pump relay, this will NOT work as there will be no power going to your pump. If this is the case, you might try the below relay bypass "jump" trick to get power going to the pump. TESTING YOUR FUEL PUMP
How to "JUMP" the fuel pump circuit at your Volvo 240 fuse panel:The fastest method to make the main fuel pump run (bypassing the Fuel Pump Relay) is by jumping two circuits at the fuse panel (left side driver's kick panel).

You can make a jumper from a wire with stripped ends or even a straightened paperclip. Jump the circuits on the right side of the fuses for best results
For a 1979-84 240, jump fuse circuit #5 to #7.
For a 1985-93 240, jump fuse circuit #4 to #6.


If the main fuel pump doesn't begin running when jumped (you should definitely hear it humming), you either have a faulty fuel pump or faulty wiring to the pump (bad wiring is really common under an old 240, near the pump). This test of course assumes your battery is good.
If one of the fuses blows during this test, the pump circuit wiring is shorting to ground somewhere between the fuse panel and the pump.

thx



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