Emissions light will not go off dashboard took it in said def. Heater needed replaced. Did that still on stuck at 55 mph than the shop replaced the whole def. Tank…. Still did nothing they’re stumped??? Did disconnect both batteries still nothing.

Pulled back my lever to shine my bright lights. Now I can't get them to go out. Even if truck is turned off alarm set. The bright lights stay on. How do I get them off?