I need help. I have a 85` blazer and I need a new steering column. I have located a few in the junk yards around north carolina but before I drive to get them I need to know something. They are asking me if I have a pulse type wiper system or not. I am not sure what the pulse type wipers are and the yards dont know either. I do know that they have a slide type intermited wiper system and a click type intermited wiper sytem on the column. But which one is pulse? Also if anyone has one for sale let me know! HELP PLEASE!