Question about 1996 Ford Ranger SuperCab

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Fuel pump fuse blows after bout 20 minutes of engine operation. no shorts found

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There may be internal mechanical resistance in the fuel pump causing it to draw more current (amps) when it warms up (for example after 20 minutes of operation). My guess is replacing the fuel pump will fix this problem.

Posted on Sep 06, 2010

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Posted on Jan 02, 2017

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My 1999 f250 is blowing the fuel pump fuse can you help


You have a short to ground ! Finding The Source Of Electrical Shorts In Your Car Which fuse is blowing ? # 10 a 20 amp in the under hood fuse box ? Check the fuel pump relay , that could be the problem .
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20 amp ECM B fuse


check again the fuel pump. check the resistance if too low. or unplug the pump and put a fuse again, if the fuse will not blow, then the pump went bad again.

tnx 4 using fixya,

drcool

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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
25112994-qvzg5ivccfb4p0rjgycwet1k-2-0.jpg

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You could have a fuel pump wire that is shorting out or a fuel pump that is drawing too much current, not a easy fix. You need to follow the wiring for the fuel pump if that is good drop the gas tank and replace the pump.

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Fuel pump fuse keeps blowing when car is put in gear and goes 20 feet


Just a guess here but if your car tries to automatically lock the doors you may have a short between those two systems

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1993 Buick Roadmaster keeps on blowing fuel pump/ecm in-line 20 amp fuse. Car stalled out in a parking lot, would not start, no fuel. Changed fuel pump, fuel filter, fuel pump relay. Found fuel pump/ecm...


Sorry to say it could also be a faulty ECM. The ecm uses circuit boards to provide grounds to a bunch of components and can short out internally.
Most of those components can fail and cause the same problem by causing a short "thru" the ECM. Things like injectors, O2 sensors, and so on.
I doubt you will find the problem without a book and some test equipment.

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Fuel pump relay is bad or fuel pump is bad (sometimes the pump seizes) and creates a load thats blowing the fuse.If both are good then there's a short in the fuel pump circuit.

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1999 Hyundai elantra died while driving found ecu fuse blown replaced lasted half a mile and blew again


Check your o2 sensor harness. The harness if not properly secured will rub on the axle to a point where it rubs through the insulation of the wire & shorts on the axle causing the ECU fuse (20A) to blow. Repair the harness & replace the fuse & bada bing! You should be in business! Hope that works. IF NOT follow this K.I.S.S.

Keep It Super Simple! It never fails!

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Blowing ECM-B fuses


The ECM-B fuse is a 20 amp fuse, and you should NEVER put a larger fuse in to try to overcome any problem. The oil pressure switch is a secondary concern; there is an idiot light or oil pressure guage in the dash to alert you to oil pressure problems. Under heavy load, such as towing, your engine requires more fuel, and if your fuel pump is going/has gone bad, it cannot supply the demand.
The problem is almost certainly a fuel pump wire harness short, caused by a dying fuel pump. I have both had this problem myself, and repaired it on three other vehicles. On my vehicle, the wire harness had welded itself together when the fuel pump locked up, and the wire harness caught on fire.
The fuel pump is in the gas tank (of course my tank was full), and the tank has to be dropped to access it. The wire harness is modular, with plugs at both ends, and can be bought from the Chevrolet or GMC dealer.
If you put an incorrectly-rated fuse anywhere in your vehicle's electrical system, the WORST place to do it is where you have--the fuel pump circuit. Fuses blow for a reason, and the manufacturer's engineers properly size the fuses for the application at hand. Please don't do that again.
This can be a very dangerous problem and repair, and no, it is not cheap.
Do not attempt to operate this vehicle until you have had the problem properly corrected. Good luck.

Jan 19, 2009 | 1987 Chevrolet Blazer

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