i have put 2.0 16v i4 into a van. the wipers on car before breaking worked as did they on van all bolted up now and running but the wipers dont work? all other electrical equipment works. i used van wiper motor and wiring from car the stalk used was from car which used to do the rear wiper etc why would this happen is wiring in connectors different should i use the stalk from the van? help much appreciated.