30-03-2019, 08:18 PM
(This post was last modified: 30-03-2019, 08:35 PM by Peter Johnson.)
There can’t be a problem with the ignition light. It is just a bulb wired between the battery and the dynamo which lights up when there is a difference in potential between them.
The symptoms you describe suggest that the contacts of the cut out are not being thrown apart as the voltage at the dynamo diminishes. I figured out what was going on once, but have subsequently forgotten.
Peter
ETA. Take a look at http://www.austin7.org/Technical%20Artic...refresher/
There are two coils in the cut out. Coil from D+ causes the cut out to be pulled in. Current then flows through the points from D+ to A charging the battery. A second coil in the path between the points and A will kick open the points if the current flow is reversed from A to D+.
The symptoms you describe suggest that the contacts of the cut out are not being thrown apart as the voltage at the dynamo diminishes. I figured out what was going on once, but have subsequently forgotten.
Peter
ETA. Take a look at http://www.austin7.org/Technical%20Artic...refresher/
There are two coils in the cut out. Coil from D+ causes the cut out to be pulled in. Current then flows through the points from D+ to A charging the battery. A second coil in the path between the points and A will kick open the points if the current flow is reversed from A to D+.