06-06-2021, 05:52 AM
Just had the dynamo checked out as the ammeter has only ever shown a discharge when operating the car. We have one of those rare breeds who knows all about old vehicles and he has not yet retired. He found one of the field coil leads was shorting intermittently and fixed that, Checked the operation of the cut-out, cleaned up the comm and the brushes and set the charge rate at about 7.5 amps. After reinstating the dynamo the ammeter still showed a discharge. Reading up notes from various clubs (Cornwall etc) one of the things that could affect charging is the small current from the ignition warning light which I had previously found to be faulty. Installed a new light and fired the old girl up. The warning light stayed on and then when I revved the engine it went brighter then blew. I then installed a spare ammeter in the feed from the battery and the generator is certainly charging. I have checked the wiring and thus far have found nothing amiss. I am running the electrics on 6V negative earth (originally positive earth). Suggestions would be appreciated.
Cheers, PeterA.
Cheers, PeterA.