31-07-2022, 08:03 PM
Hi
For a standard Ruby (your 1932 A7 will be very similar), the ignition switch (spade/key switch) part of the PLC2 controls:
Ignition coil
Ignition warning lamp
25 Amp fuse which runs the Petrol Gauge, Stop Lamp and Trafficators
With modified wiring, it's anyone's guess what else has been added to this switches workload !
These switches are fairly "chunky" inside, and resistant to overload but maybe a long term direct short of the battery could have affected it. With 90 years of wear, they can sometimes get a little unreliable.
The CFR is also pretty robust
I can only suggest that you get out the test meter and start probing
Apologies for anyone tired of hearing about it
but see my Ruby wiring diagram here: http://www.da7c.co.uk/technical_torque_a...rubies.htm
For a standard Ruby (your 1932 A7 will be very similar), the ignition switch (spade/key switch) part of the PLC2 controls:
Ignition coil
Ignition warning lamp
25 Amp fuse which runs the Petrol Gauge, Stop Lamp and Trafficators
With modified wiring, it's anyone's guess what else has been added to this switches workload !
These switches are fairly "chunky" inside, and resistant to overload but maybe a long term direct short of the battery could have affected it. With 90 years of wear, they can sometimes get a little unreliable.
The CFR is also pretty robust
I can only suggest that you get out the test meter and start probing
Apologies for anyone tired of hearing about it
but see my Ruby wiring diagram here: http://www.da7c.co.uk/technical_torque_a...rubies.htm