The brake light started coming on and then off, it got more frequently. I looked in the Haynes manual no mention of anything would help narrow it down, I have meters some knowledge of electronics. The wiring diagrams just show drivers for light? The brakes seem to work OK. Had the codes read and everything looked OK, except the ABS system indicated an low ref voltage. Not sure what the connection, could be with the two systems, as the ABS light is not on and there is no codes.