My cruise control on my car quit working. Well the main cruise stays on but the cruise itself will only engage half the time. If I repeatedly hit the cruise button it will eventually engage. But that's if I hit it for like 15 minutes during my commute. And occasionally when it does work it will accelerate on it's own. All other electrical is working fine to my knowledge. Any ideas?

 

probably faulty switch

 

Thanx, so how would I check or fix that?