I'm bought a b7200 three years ago, and I'm on my third glow-plug controller. They burn out and have to be replaced. Plugs won't glow without them which makes starting tough. Is this normal, or is my sketchy wiring causing a problem. Last night, when I first installed a fresh one, there was a little smoke (like it was going to burn out too) before it started to function normally. Any thoughts for a newbie are appreciated.