following problems with my 230 slk asr trouble, i decided to chech the 4 wheel sensors with a ohm meter.... front two show 1074 from sensor and 1074 at the other end going into the asr computer.... the front shows 1092 from the sensor end but the front left shows 1092 going into the computer and the front right shows -293 ????? is this a wiring problem?? my roof isnt working with the asr lights on why???