Wipers only work once!
 

Hello all, this is my first time posting on here, but this site has helped me a ton with my 72 240z. My wiper motor went out so I replaced it with a good condition used one. I opted to not go for the honda motor to keep the car as original as possible. Once everything was wired, i sprayed down the windows and turned on the wipers. They came on strong, but only went half way up the window and then back down to their resting position and didn't go again. Every time I turn the switch they go once half way up the window. Before I finished the install I ran them without blades and they would run just fine. What am I missing??? Thanks everyone

Where did you get the used motor from? What year Z did it come from?