I have 2003 voyager 2.5 crd. The handbrake warning light is continually on. I have checked the handbrake switch and have power to it and seems to work as it should ie break the circuit when the handbrake is released. My brake fluid is topped up and all the brakes work OK including the handbrake. Is there a brake fluid sensor? On a lot of vehicles there's one situated on the reservoir bottle cap but not on my voyager. Please help anyone?