Fuel pump fuse blown, what causes the fuse to burn?

Fuse's burn if a component in a system has an electrical failure wether it be permanent or intermittent or sometime electrical circuits have an electrical surge which can be caused by numerous things and the fuse will burn to protect the circuit. If your fuse is coninuously burning out then you need to do some investigative work. First I would locate the fuel pump relay and remove that then replace the fuse and see if it burns out, second if you can access it try to unplug the wiring to the pump and replace the fuse, third you should check the wiring going to the pump to see if there is damaged wiring. The last thing that may (but unlikely) be the problem would be the ECM that controls the system. If the first three fail you should try and have it properly diagnosed by good shop.

Hello ju2454.
Fuses are in place to protect the circuit from overheating the wires.
So if there is too much current flow the fuse burns to open the circuit.
So there is something drawing too much current in your fuel pump wiring.
This could be caused by the positive 12 volt feed from the fuse all the way to the pump.
It is often best to eliminate a portion of the circuit to determine where the short is taking place.
I would start at the fuel pump itself. If the fuse blows as soon as you turn on the key, undo the connector at the tank to the pump and put in a new fuse. Try it again, if the fuse pops then your short is before that point likely a chafed wire on the body. If the fuse stays good then the problem is in the pump harness or the fuel pump itself.
hank you for using Fixya!

KL

The fuse will blow only for two reasons, either an overload or a short to ground. chances are if you have not changed the fuel pump recently then i would suspect that the pump is on its way out. let me know how it works out please

When I started the petrol is not raining