oil pressure buzzer

ok just got into my car and the oil buzzer comes on and light flashing just after accelerating  8O . I did notice the the red light was on faintly last week theres oil in the car so thats not the problem.
I,m not sure if i trust my instruments as the fuel gauge if showing full all the time and water temp doesnt move, how do i stop this buzzing is it a matter of changing a switch ?? or changing oil filter would solve this? :dontknow:

Try the search facilty this has been discussed before

Sorry i don't no the answer

Cheers………………

Did a few things today tryed a different clock set changed the oil, filter, both new oil switches, spade ends and still have the buzzer sound, took it for a drive and when run long enough light a buzzer disappeared.   oh well back to reading the forums..