Oil pressure switch

[Paul]

Don't worry.


My Fazer has now clocked 97000 and I've ridden it with the 'oil light on' many times.....  it's just a level switch.... as long as the oil pump is picking up oil, you'll be fine.  The Fazer engine is pretty much unburstable... it's everything else that ultimately wears out.... not least the rider.

[His Dudeness]

It might not be buggered it might just need to be cleaned. The float could be sticking or the wire going to the switch or a pin in a connector could be grounding.

On a side note there's some nice pictures of a R6 oil level gauge. The ring terminal is bolted to the engine so that is permanent ground. The float moves up and down on a shaft, when the float gets low enough it connects the ring terminal and the wire so the wire is grounded and your light comes on




There's the fazer one

Just to add to that in case any one finds this doing a search. The float has a magnet in it. The shaft that the float moves up and down on has a reed switch in it like in the picture.




When the float drops the magnet pulls the reed switch closed and that creates the path to ground for the oil light.

[fazersharp]

Interesting - the reed switch, I have seen them snap in alarm systems from constant use (entry door) but wouldn't of mattered as in the bike it is normally open with full oil.

[His Dudeness]

Yeah normally open so the reed switch does nothing until the float drops so the reed switch is unlikely to fail due to wear. The one I looked at, the reed switch was working fine but the small circuit board that the reed switch is soldered onto was corroded due to water ingress and the track in the circuit board was completely gone so the circuit was always open even when the reed switch was closed. You'd never know that the circuit had failed open unless you checked if the oil light had come on during an oil change. The check that happens when you press the starter switch just shows that the bulb is working not that the oil level switch is working because when you press the starter switch it grounds the bulb through the starting cut off relay not through the oil level switch. I bet there are loads of corroded oil level switches but it goes unnoticed.