I had the brake light come on the other day .... It still has the powermaster brake unit btw.... I rasied the hood and looked it over felt of the motor etc.... wiggled the plugs on the motor and the grey switch on top and tapped on the switch. Nothing felt warm or loose and when I looked the light had went off.... I guess I'll watch for it to come back.... I have replaced 2 electrical switches already so I suspected a faulter alarm switch... I figure the system pumps up pressure and if the pressure is low you get an alarm .... The brakes felt fine through it all as well.