19-08-2022, 09:00 AM
(This post was last modified: 19-08-2022, 09:00 AM by John Cornforth.)
Hi David
I have a suggestion for testing the ignition switch / coil feed whilst driving. Wire up a small 6 volt bulb between the Switch terminal of the coil and Ground, and place it somewhere easily visible whilst driving. This way you may be able to "catch it in the act", i.e. see if the bulb goes out at the same time as the engine dies.
The ignition switch part of the PLC switch does eventually wear and can become a little intermittent after 80 or more years. You may even find that the bulb flickers a bit as you turn the key, which is a sign of wear.
On the subject of red-key battery isolators, of the three I have tested (at high current) all have shown inconsistent contact resistance and I wouldn't trust any for use on a 6 volt car.
I have a suggestion for testing the ignition switch / coil feed whilst driving. Wire up a small 6 volt bulb between the Switch terminal of the coil and Ground, and place it somewhere easily visible whilst driving. This way you may be able to "catch it in the act", i.e. see if the bulb goes out at the same time as the engine dies.
The ignition switch part of the PLC switch does eventually wear and can become a little intermittent after 80 or more years. You may even find that the bulb flickers a bit as you turn the key, which is a sign of wear.
On the subject of red-key battery isolators, of the three I have tested (at high current) all have shown inconsistent contact resistance and I wouldn't trust any for use on a 6 volt car.