On my 1998 VW Jetta GLX VR6, SOMETIMES When I start the car, the ABS light will stay on, the Brake light will stay on & I noticed the A/C does not work. I can turn the car off, back on & 98% of the time it will fix the problem, the other 2% of the time I will have to turn the car back off & back on, maybe two more times. Don't know where to even start for trouble shooting this one... Any idea's?