Actually it's much easier to simply use a spare 12 volt battery and a pair of jumper cables. Simply hook positive to positive & negative to negative along with connecting your 12 volt timing light to the 12 volt battery & #1 cylinder. Doesn't matter which terminal is grounded. Bill B. 1956 DeSoto Station Wagon 1957 Imperial Southampton 4 Dr Htp + half dozen or so 6 volt gems |