Comment by dylan604

In my personal experience with cars that had strange electrical problems, they tend to be on a bad ground somewhere in the loop. I once took a Chevy S-10 to a place my dad recommended. A guy walked out to ask what the issue was, he nodded, took a step back to look at the truck and asked the year of the truck. He then nodded and said "Yep", and then without looking reached under the dash on the driver's side and tightened a screw by hand. All electrical problems went away. He walked away after politely telling me to have a nice day. I was baffled, and he said it would cost him more in time to write the repair up than he could honestly charge me.

The point is that stable ground connections are notoriously hard on something that by design shakes, rattles, and rolls with all of the vibrating and bouncing on our "modern" streets. It's also a very easy thing to misdiagnose unless you're a mechanic that specializes in automotive electrical systems. It also takes time for new year models to display their warts enough that non-dealer mechanics gain experience repairing them.