Question about 2003 Isuzu Rodeo

2 Answers

Fuse to fuel pump keeps blowing

Fuse to the fuel pump keeps blowing. But when it start it runs good until it blow again with no warning, even if your are driving.

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2 Answers

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  • Isuzu Master
  • 2,760 Answers

Sounds like a bad fuel fuel pump or a wire chafe someplace on its way to the pump

Posted on Oct 15, 2013

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  • Isuzu Master
  • 14,204 Answers

Could be your fuel pump relay,here's a link to it.

Posted on Oct 15, 2013

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6ya6ya
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Posted on Jan 02, 2017

  • 40 Answers

SOURCE: replaced fuel pump and checked all fuses as well

I'm sure it's not, but check to see if the battery is connected backwards. It is theoretically possible that the engine was started in reverse, then the reason your fuses popped.
Otherwise, the popping of a fuse is indicating that there is something not right with the wiring causing a short.

Posted on Jun 11, 2010

jturcotte
  • 7754 Answers

SOURCE: Fuel pump fuse constantly blowing

Hi, the fuse comes after the relay and only powers the pump. Therefore, the likely problem is your pump motor having shorted windings, sorry. :o(
There is a way to test the pump before replacing, but you would need an ammeter. Disconnect the pump connector and use a jumper wire from battery positive in series with a high current or shunted ammeter that can handle at least 20 amps. Connect the meter to the pump and run it just long enough to get the amperage reading. The pump motor is on the gray wire, and make sure the black wire is grounded to get the pump to come on. The current should be less than about 15 amps. A good shop can run this test for about $40. The cost of a new pump will be many hundreds, so you might want to be sure it's bad before replacing. A new pump is $270 at Autozone, and labor to replace the pump will be several hours. Some shops will discount the price of testing the pump if you have to pay to replace it. Please let me know if you have any questions and thanks for using FixYa.

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Posted on Jul 19, 2011

  • 977 Answers

SOURCE: I have a 1994 Isuzu

whatever this fuse controls is drawing too much power, you need to know exactly what this fuse is for before you can find the problem,it may be the fuse for more than one thing.......hope this helps........cheers.

Posted on Sep 06, 2011

  • 7 Answers

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With the help of kori105's tester and after 3 hours of chasing and removing every thing from the dash I found the problem to be the factory anti theft I moved the wires around an the buzzer came on and the test light went out. The anti theft is located in the dash next to the glove box its black with one wire harness with a bunch of wires going to it. Thanks for the tester idea it worked great

Posted on Mar 03, 2012

  • 12 Answers

SOURCE: 20 amp fule pump fuse keeps blowing on my isuzu rodeo 2004 v6 it will run for a while then it will blow also when i turn truck on it takes a while for it to starts it just cranks then kicks on

Better you use correct fuse and note there is no loose contacts between the fuse and its connection

Posted on Aug 01, 2012

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1 Answer

How do I stop my efi fuse from blowing repeatedly. Just changed the fuel pump and now that fuse keeps blowing.


What about your fuel rail regulator, which is in the tank with the fuel pump on some cars? Does it have a pressure switch/sensor that isn't telling the engine control module to shut the pump off when the rail pressure is obtained? If you turn the vehicle to on (not start) and the pump runs more than a couple seconds, like until the fuse blows, it could be either a stuck pump relay or worse, the fuel pump control signal. Pull the pump relay, add a new fuse and see if the pump runs with the key in the on position again, which it shouldn't. If it doesn't run, the issue is either the relay, or the control signal to the relay that is keeping the pump on all the time, causing the fuse to blow.

It sounds to me like the pressure is going to high and stalling or slowing the pump causing excessive current from the motor and blowing the fuse. If that's the case your old pump might not have been the problem. How's the fuel filter? That's in line with the fuel line to the fuel rail?

You don't have to answer the questions, just look into them for your own peace of mind.

Jan 23, 2016 | Cars & Trucks

3 Answers

Why does the 20amp fuse for the fuel pump keep popping?


rodeo or rodeo SPORT?
2.2 or 3.2 engine> not even a cylinder count....
i wish all problems were this simple. (easy with ammeter)
the load is SHORTEd, the fuse saved the fire.
x2 all above answers
but keep in mind some fuses run more that one thing, ill check.

20amp fuse (no label) no engine option stated, must be the 6ve1, v6 twin cam.
fuel systems vary by (engine type)
not the 3.5L vin Y engines. 2.2 or 3.2L>?
fuse EB12, Engine bay fuse blows, 20a, fuel pump.

so pull these conn.
H-15 first
then if ok, (no blow)
H-25: if not blow now the pump is shorted
or the wire from H25 to F1 is ground to the frame.
wire inspections are first. on that path.
i use a EB12 , circuit breaker and mag ammeter to find this fast.
ask.



2.2L
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1 Answer

Fuse keeps blowing!


The fuel injection fuse should also power the injectors. If the fuse is blowing, I would think one of the injectors has shorted to ground.
Have you checked them ?

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Using a smaller fuse should make the problem happen more often.
A mechanic would unplug the pump harness at the tank and check the circuit for high resistance or a short to ground.
If nothing is found in the harness, I would suspect the pump in the tank.

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Fuse for fuel pump keeps blowing


Normally fuse blows off if more current passes through it than what it is designed for.

Probably it is worth checking what original fuel pump fuse amps requirements and have the same installed.

Also check the relay if there is a relay set for the fuel pump.

Good luck

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replace the fuel pump, it is drawing to much current, this is common when the pump bearings get worn out, also make sure you replace the fuel pump connector at the fuel tank connection, it will be burnt..

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That fuse provides power for the fuel pump. Either your fuel pump is blowing the fuse or there is a shorted wire.

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Verify fuse is correct size, then see what you are turning on else when it blows. Fuel pumps are designed to pump up then shut off, until needed when starting and running. It might not be shutting off and staying running when vehicle is not running. Make sure ground circuit is in good shape and positive side as well. Does this blow fuses when you go to start, or does it start and run for awhile then blow?

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