I have an 05 QC 1500 and have been noticing that the intermitent wipers will occaisionally either stop working or run constamt for a time. Sometimes they will return to intermitent other times I have to turn them to on or off and then back to intermitent. My problem is I have no understanding of how they work to figure out where to start looking fr solutions. Any help will be appreciated.

 

The problem is the ground on the park position inside the wiper motor. You can take it apart and clean and re tension the contacts but its only temporary. Best to replace the motor.