Just change the OVP and get it over with! It's cheap, easy and likely a culprit. Even if it isn't, it's good preventative maintenance!
I don't think your car has one... The OVP is Overvolt Protection Relay, it protects the cars electrical system from getting fried, but can go faulty after a few years and cause all sorts of electrical problem. If you want to learn more, do a search, this topic has been discussed a MILLION times!
Good luck Alon and just change it.