> The spark coil has three terminals. One is ground, one is for the spark > plug, and the third goes to the breaker points. But he's got one of those ignitions where mechanical action slowly builds up then quickly breaks the magnetic circuit. These don't have points or a primary circuit. The electrical part is only the high voltage coil. ******************************************************************** Olin Lathrop, embedded systems consultant in Littleton Massachusetts (978) 742-9014, olin@embedinc.com, http://www.embedinc.com -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu