Question for the community... I have a 1990 Wrangler. It has a lever that combines the directional turn signals, the windshield wiper control and the windshield washing fluid pump. Everything is OK except the intermittent function does not work. I only have two wiper speeds and I don't get the intermittent feature on the wipers. What do you think is the most likely cause for this? How expensive is it to get whatever it is I need to get this working? I live in Los Angeles (actually Long Beach) California. Thanks in advance for any advice you might send this way.