losing power to fuse 26/petrol pump

[cheessee]

im losing power to my fuel pump fuse and relay causing my car to cut out randomly and then not start for ages. ive already checked the back of the fuse board to check for loose connections but seem to be fine.

its only started happening since someone went into the back of me ?
any ideassss ????
thanks

[PRICER]

you checked the wires that go into the tank on the top? you can access it from under the carpet and the plastic cap in the rear of the car under the back seats.

[cheessee]

yeah ive put a new fuel pump in because i thought it was that at first, so checked all the wires at the same time seemed to be fine. its doing my head in now hahaa