What causes no spark on a 72 VW Bug?
12 volts should only be thereon the 1 side when points are closed right? The points are called breaker points for a reason. They break the connection between the two coils and that is what induces the spark. So when the points open there should be no power to the secondary coil (number 1 post). Check your coil with an ohm meter.
What happens when there is no spark from the ignition coil?
1 Power. Two positions of the ignition switch provide power to the positive primary post of the ignition coil. 2 Signal. With no external signal to the coil negative primary post, voltage would travel through the ignition coil windings without inducing any secondary spark. 3 Flow. 4 Open Circuits.
How can I tell if my bug has no spark?
So when the points open there should be no power to the secondary coil (number 1 post). Check your coil with an ohm meter. With no power to it check between the positive and negative posts on the coil. You should see approximately 3 ohms. If you don’t see that I would get a new blue coil.
Why is my ignition not working on my 68 VW?
If you do not have power at the coil with the key in both positions it’s quite possible the electrical part of the ignition switch is faulty. And there should be an in-line fuse for the coil that is located near the generator; make sure that fuse is good. Had a very similar problem on a 68 VW. No spark.
Why is there no spark on my 68 VW?
Had a very similar problem on a 68 VW. No spark. Replaced the coil, center wire, points and the rotor. Nada. Turned out to be the center pin conductor in the rotor cap. Looked OK, but on close inspection, the little metal tip was gone. New cap cured the problem.
How many ohms does a no spark bug have?
With no power to it check between the positive and negative posts on the coil. You should see approximately 3 ohms. If you don’t see that I would get a new blue coil.
Can a VW air cooler get knocked out?
The VW air-cools must use a VW specific coil with an internal ballast or the ignition points will burn up and the condenser may get knocked out. If you do not have power at the coil with the key in both positions it’s quite possible the electrical part of the ignition switch is faulty.
https://www.youtube.com/watch?v=CkPwC_kdLmU