When operating the turn signal and using the wipers on delay, I smelled a plastic like burning smell thinking it was the wiring in the controller arm. This happened several times and eventually the wiper runs 100% on the time delay with no way to turn off except by pulling the fuse. I can operate the normal speeds of the wipers when it rains if needed but I still get a smell sometimes. I have not had the issue looked at but will next week at an independent repair shop. I’m concerned maybe an electrical issue could cause a fire at some point in time.