02-07-2019, 04:52 PM
Hi Peter
A loss of charging shouldn't kill the ignition, as the battery will continue to supply it.
It sounds like the supply to the coil is being briefly interrupted. From the battery, current flows via the ammeter and the ignition switch (part of the PLC switch) to the coil. No fuses are involved.
I would look at the integrity of the ignition switch, maybe by wiring up a temporary small wattage 6 volt lamp between the coil supply terminal and ground. With ignition on, this should light up consistently. Waggling the ignition spade/key may show any flicker or intermittancy. The PLC switches are robust but 80 plus years old and do get slack.
If you don't have a copy, try my Ruby wiring diagram on the Dorset club site: http://www.da7c.co.uk/technical_torque_a...rubies.htm
Cheers, John
A loss of charging shouldn't kill the ignition, as the battery will continue to supply it.
It sounds like the supply to the coil is being briefly interrupted. From the battery, current flows via the ammeter and the ignition switch (part of the PLC switch) to the coil. No fuses are involved.
I would look at the integrity of the ignition switch, maybe by wiring up a temporary small wattage 6 volt lamp between the coil supply terminal and ground. With ignition on, this should light up consistently. Waggling the ignition spade/key may show any flicker or intermittancy. The PLC switches are robust but 80 plus years old and do get slack.
If you don't have a copy, try my Ruby wiring diagram on the Dorset club site: http://www.da7c.co.uk/technical_torque_a...rubies.htm
Cheers, John