Mk1 caddy rear lights

Ok I’m now at breaking point and quickly running out of hair

The main feed for my rear lights runs down the passenger side the bridges off to drivers side.

Now I have full lights drivers side but absolutely nothing passenger side how can this be.
I have redone the earth and nothing. For some reason the wiring looks like it was done by stevie wonder. Any suggestions would be a great help.
Even the suggestion of setting it on fire is acceptable now lol.

This is what I’m working with



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get rid of that poooooor;y done repair job.

Time to get out the solder heat shrink, and good wire.

you have bare wires, and tape that looks as if it was done by three monkeys, watching "hey hold my beer" vidoes.

I suspect that you need to run new wires from the side that is working but the turn to the side that isn't.

The you can try to find the turn wire, and run new to it.

Ford Sockets should fit if the sockets are bad.

Right I found a better set of holders plugged them in I have 12v but still no light???



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and measuring the bulbs resistance says its good?

other wise it's the socket or the bulb or ground

Measuring 12V with a voltmeter puts no load on the circuit, so a poor connection can still register as 12V but as soon as any significant current is drawn, it will show less/0.

You can make a "load tester" with …… a bulb holder and bulb. So you may as well solve the issue in place.