I have a 1934 Roadster. When I turn on the ignition and slowly turn over the engine the ammeter moves between o and 9 amps discharge. It should only show a maximum discharge of 1.5 amps. I have tested the ammeter and even replaced it. I have replaced the coil, distibutor, points and condensor. This week I isolated each part of the electrical circuit in an effort to find what is obviously a leak to earth. No luck. If I drive with the lights on at 30mph it shows a 10 amp discharge. I am now at a loss as to what to do. Any hints or advice gratefully accepted.

Hi Eddie,
what does the ammeter show at 30mph, without anything switched on?

Eddie, have you checked the contacts in the regulator box to see if they are opening and closeing correctly.
Jon.