I'm Working on a 1987 Porsche 944 thats been sitting since at least 2006 for a lady. After replacing numerous parts due to sitting for at least 5 years with gas in the tank I got the car running, but the wipers only had one speed, no intermittent and don't park. She said they didn't work when she parked it in 2006 after having been to a porsche dealer for cooling fans. Until about 2 weeks ago I have never touched a porsche and still know very little about them. I tested the wiper switch and replaced with oem, got two speeds, but still no intermittent and don't park. I tested wiper motor - bad, replaced with oem got three speeds, no intermittent and no park. Replaced wiper delay timer/relay no change - I have no idea where to look next. I would appreciate any help and would like to give the lady her car back fixed correctly after all the money she has put into it and our local porsche dealer (200 miles away) isnt being helpful at all.

Thanks Dan