i have not had this problem in a ranger yet. maybe a bad spot in the motor. if you have the wipers on pull on the wiper arm like your going to use them by had and see if they kick in after you move them a little. if they kick in after you moving them some than most likely you ave a bad motor.
a ranger is really easy to do one of my side jobs is at my buddys trans shop and his r&r guy can drop the trans put in the new clutch and put it back on the ground runnin in 30 mins and he is a honda tech lol. im a semi hard core ranger guy and have not been able to do that