Mine was intermittent on and off. All I had to do was clean the plug and contact points on the smog pump. Right in front of the motor on top. There was a green powdery corrosion on both parts. The pump can't send or recieve proper electrical signals. A little piece of sandpaper clean the little nubs, then roll up a really small piece to clean inside of plug. Sprayed with a little wd-40 rust inhibitor, and let sit over night. Plugged in next morning, light was off never came back on. I'm begining to think crossfire electrical parts don't like moist environments. Hope this little looked over connection helps people.