I'm not sure what happend to the intermittent wipers on my 78 k5, but i know some of the wiring is gone and the module itself is gone. Mist, low and high work, delay and speed control do not work. I cannot find the parts I need from a truck in any junk yard, but there are plenty of impala/caprices with it on the wiper switch. I want to know if it would be possible for me to swap out the wiper arm/switch, then use the wiring and module from an impala/caprice. Anybody know if the column parts are interchangable? And what exactly are the parts I would need to grab out of the new column? Thanks for any replies, Steve.