I have a 04 s40 t5 that the brake fail light comes on,,,, nothing wrong with the brakes,,,,,, before brake light comes on service engine light and power steering service light comes on also,,,,,,only way to clear is to disconect neg. cable at batt. then it is ok for a while then all lights come on ...

I have a 04 s40 t5 that the brake fail light comes on,,,, nothing wrong with the brakes,,,,,, before brake light comes on service engine light and power steering service light comes on also,,,,,,only way to clear is to disconect neg. cable at batt. then it is ok for a while then all lights come on a...