In a message dated 9/14/2007 12:04:20 PM Eastern Daylight Time, S.Janzen at comcast.net writes: currently running with a Bosch Blue coil, no visible resistor anywhere. The blue is internally ballasted IIRC, you can check between the LT terminals, around 2-3 ohms... Glen not a tweet ************************************** See what's new at http://www.aol.com