My vehicle is an A4 2009 2.0TDI.I replaced the front pads no more than 2 months ago and now the pad warning light has come on (yellow). I have checked the continuity in the wiring for the pads (one sensor in the nearside front wheel). THE CIRCUIT IS OK. I have tried joining the two terminals in the plug section of the harness where the pads originally connect to and the light still does not go out. Any ideas where to go to next to find the fault????.