I have an electrical cross feed problem that I have been unable to solve and it is driving me nuts

When I turn the ignition on, (with the lights switched off), the side/rear/ ignition lights come on -

When I turn the side/rear lights on (with the ignition switched off), the side/ rear lights come on and so does the ignition light

I have removed the inspection door on the firewall and through the jumble of wires I can see no obvious fault

I removed the light switch and isolated it from the car but still wired up - no change in the problem!

I have studied the wiring diagram and done a web search but without success

Your help would be much appreciated

Many thanks


1967 Plus 4 Drophead coupe with a TR4a engine