I have a 1999 Saab 9-5 and my low oil pressure light comes on. However there is no pattern, that i can tell, for when it comes on. Also the light flickers on and off. But the intensity of the light goes from very dim to all they way on and then it will dim out. I assume that this means that my pressure sensor is going bad. I have ordered another switch, but i need directions on how to install it. Really i just need to know where i can locate the pressure sensor on the vehicle. Any help would be great. And if my assumption is wrong please correct me.