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Where does a short typically happen when the fuel pump fuse blows as soon as you turn on the ignition key? I replaced the fuel pump motor and also disconnected the wiring harness and still blew the fuse.
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LEARN THAT FUEL PUMPS CAN SHORT AND DO ALL THE TIME.
WIRES GOOD FUSE BLOWS IS PUMP
THE SCHEMATIC ON THE KUBOTA PROVES THAT
IF SEEN
AND I CAN NOT.
I have an AMP clamp meter
and i clamp to the pump + plus wire
and see overload over 10 amps the pump is bad. or jammed(deep inside)
dont know why changed fuel pump if total power failure but need to test electrical for short [ will need a meter ] start with battery test and check wiring and connections and wotk your way thru ignition system and starter system looking for reason system has a direct short
but its a short. non the less.
the solution to this oddity is called an AMP meter, or Ammeter
you can find shorts with one, by finding which branch on the tree is shorted.
what fuse. we cant guess that
and use a real schematic to find the path.
It is typical problem and one of your most expert can diagnose it.That's why you should take it to a qualified repair shop . Sounds like you don't have any electrical trouble shooting skills . Short is in the wiring somewhere going back to the fuel pump . Not in the fuse box.
I'm no expert but when you turn key to run position, this turns the fuel pump on if the pump is faulty i would think it would blow the fuse also. Or its your theory a short in the ignition system wiring.
Put the fuses back in,and unplug the fuel pump from the tank,and turn the key on,if it does not blow the fuse,then the pump is the problem.Rate this if it is helpful,thank you.
CHECK FOR IGNITION WIRES SHORT TO GROUND.I HAVE SEEN A BAD FUEL PUMP BLOW ECM FUSE.REMOVE THE FUEL PUMP FUSE DISABLE FUEL PUMP AND SEE IF FUSE KEEP BLOWING.
Was the old fuel pump bad? It might be worth the cost to replace the ignition switch. The wires to the fuel pump would be a second guess if the old pump was bad and burnt the wires before the fuse went. When you eliminated the fuel pump you also eliminated the wires to the pump and it started. Then you replaced the pump, but not the wires. The ignition switch is the other end of the circuit.
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