Somtimes depending on the type of grease/lube that was used in the wiper motor will be affected by any moisture in your air system. Carefully dis assemble and cleanthe the wiper motor valve, don,t lose the o rings incase they need replacing. My Eagle wipers had dryed lithium grease in them and did exactly what is being described. My wiper motors were to far gone to operate correctly so ti save my sanity We went with new electric motors and never looked back. Clean your windshields well and Rain-X them in the mean time if needed.
P.S. mark your air lines and their orientation on the motors before disassembly.😉
Hi Van, That makes sense then, that for some reason the valves just aren't functioning properly. Not at the top of the list of things to do at this point, but maybe get an electric on for the drivers side when I can't stand it any more.
Where did you get yours? Were they an easy install? Did it use the stock switch location?
Thanks
Seb