Originally Posted by
Iain Mac
I agree that a sensor or ring is causing the light to come on when the car gets up to speed, but I've been pointed towards a sticky relay being the reason the pump sometimes runs even when the car is switched off. That would also explain battery drain, and why the light won't go away after it has illuminated.
Question now is, which relay in the passenger footwell do I need to be looking at?
How often does it fire the pump in 1hr? Because I'm nearly sure my old car used to do the same.
Have you checked the current draw with the engine off? Alarms will kill batterys another thing do you have another car near it with central locking it could be waking your alarm up when you open and close it.