(07-01-2018, 04:12 PM)Peter Naulls Wrote: Andrew, I disconnected the coil and put a voltmeter (rather than a bulb) across the low tension wires. As I crank the engine it flicks between 12v and 6v - not what I expected. Does this suggest there is some leakage across the points? I'm beginning to think there is a short in the loom somewhere given that all the other components have been replaced.
Peter.
Peter,
You need to leave the coil in circuit or use a bulb when you take the measurement. Your voltmeter will have a very high input resistance, typicaly 10M ohm if you are using a digital multi meter. If you are reading 6V with the points open it implies you have a leakage in the distributor equal to the input resistance of your voltmeter, which is probably negligible.