Welcome to the forum. Since it is intermittent, it sounds like you have a plug to the dasboard itself that is loose, given the turn signal stock functions remain, it is more than likely quite a ways up there. . Fun thing is getting up there to check it, might be easiest to remove the bottom cover of the dash under the steering column, might give you a little room to get up there. It doesn't sound like a fuse or relay, which would not reset itself to make it intermittent. Definitely not a common occurance..