NICKYT

I HAVE A 92 500 SEL IN MY SHOP WITH THE STRANGEST PROBLEM I HAVE EVER ENCOUNTERD.WHEN I PUT THE IGNITION ON EVERYTHING IS FINE,THE MOMENT I START THE ENGINE THE WIPERS WILL GO ON AND I CANT SHUT THEM OFF UNTILL THE CAR WARMS UP.I CAN PUT WIPERS ON HIGH & MEDIUM SPEEDS BUT CANT TURN THEM OFF.ALSO ONCE THE CAR WARMS UP THE WIPERS RETURN TO NORMAL EXCEPT THAT EVERY ONCE IN AWHILE WHEN I PUT THE TURN SIGNALS THE WIPER WILL MAKE ONE WIPE AND THE LIGHTS ON THE CLUSTER WILL COME ON & OFF.IVE REPLACED WIPER SWITCH,WIPER RELAY AND COMBINTION RELAY AT NO AVAIL.ANYONE HAVE ANY IDEAS WOULD BE VERY APRECIATIVE, THANKS NICK.