i have a 1966 el camino and would like help on the operation of the window wiper motor and washer. the washer never has worked correctly so i decided to take it of the firewall, clean it and try to find out why it would not work. it appears to be it only needs a new diaphram kit. when i put the system back together the wipers work but they wont park when i turn the wipers off. i dont remember if they did have a auto park. can some one exlain to me how my 1966 wipers should work so i can trouble shoot them. the switch on the dash is a three position switch. 1.) off 2.) low speed 3.) high speed . the switch also has a button in the center when pushed it energizes the washer pump. pumps a few times and turns off. thanks in advance.