Jeff,
Remove the liner and there are 2 or 3 relay boxes under there. I'm not sure which one is for the pulse wipers. I had to replace mine, but that was about 3 years ago and I just don't remember. You change over to pulse you will need the wiper switch and the pulse relay. I think I still have the relay box away somewhere with you decide to go for it, but would have to find the part number to make sure I still have it.
Gary