Oil light

[Mawsy]

Hi all,I have a 1989 2.1 automatic fuel injected caravell , the oil light and the buzzer have come on, th oil level, auto transmission, and water levels are all ok any advice cheers Mawsy 

[silverbullet]

Bad earths/corrosion on terminals. Check the oil switch wiring on top of the engine first (brown wires, white plug with green marker paint)
Trace the wires in case one has chafed or melted and is shorting to earth, setting of the buzzer.