11-06-2018, 12:58 AM
That rule may apply for postwar coils but early neg earth show CB and SW.
If using a very old coil really only certain by checking the polarity. The pencil lead method OK but avoid drawing long sparks or gaps which will not jump as stress the car sytem and beware shock which stresses the human system.
Some use an analogue meter but not intended fro thousands of volts.
If using a very old coil really only certain by checking the polarity. The pencil lead method OK but avoid drawing long sparks or gaps which will not jump as stress the car sytem and beware shock which stresses the human system.
Some use an analogue meter but not intended fro thousands of volts.