40s Deluxe no spark in Pontiac Flathead Owners Posted January 9, 2018 OK if I can chime in, at this stage dont worry too much about the 6v versus 12v, find out why there is no spark; you will get spark with either voltage. See that white wire coming into the distributor, that carries current form the ignition switch to the contact breakers (points) you first need to determine if you have power at that wire with the ignition turned on, a test lamp or volt meter will quickly establish this. If you have power there, the next thing to do is hand turn the motor to a position where the points are closed, then with the ignition turned on, with a small screw driver manually lever the points open, you should see a small spark at the points, the spark wont be too bright so you may have to throw a cover over the area to keep it dim if you are out in the sunlight. If you dont have a spark at this point you can start by running a piece of emery or fine file between the contact points to make a clean electrical contact surface, if that doesnt work you need to back track through the wiring to find out why; the coil will not produce a spark without this circuit being complete. If you do have a spark at the points then we can move onto the coil wiring, but first do this bit, its the most likely cause of your troubles.