i am having a strange problem with my wipers. This problem only started yesterday, namely, when i put the key in the ignition and turn to start the wipers start working immediately even if the stalk on the steering column is in the off position. When this happens the wipers make two or three sweeps of the screen and then stop, but not in the correct position. No matter what position i then set the wiper controls to they dont respond corectly, but instead go through a "cycle" of coming on for two or three sweeps and then stopping, each time ending up closer to where they should stop if workin correctly. When the blades stop where they should the wiper function then works as normal i.e. does what i ask when i move the control stalk. This whole event takes a couple of minutes. Does anybody know what would cause this? Any help greatly appreciated.