I have gleaned some snippets of evidence in my hunt for the end of the yellow pad wire and the elusive '119 Earth connection -1- in headlight wiring harness'.
I do know the old yellow wire is grounded somewhere. Evidence: my meter finds continuity with any bare metal on the car and the yellow wire tail in the engine bay, in fact the shiny metal on the exposed centre console area is good for this. Also continuity with lots of pins in the connectors at the base of the A-pillar, they must simply be other earths.
I had an idea! The yellow wire will be earthed via one of the chunky principal earth points bolted to the car. Find which one and try and trace it until I encounter my yellow wire connection.
Did not take long to find which earth, started with the bolted earth point at the base of the A-pillar, unbolted it and bingo! continuity between the yellow wire and car body vanished. Conclusion: the yellow wire is earthed via this earth. The other A-pillar earths also went dead.
Interestingly, with the big earth detached I have continuity on 4 pins in the connector (detached) of the left side headlight and yellow wire. This is in accord with the wiring diagrams.
Now I try and trace this big earth and it gets bizarre. The big earth seems to leave the base of the A-pillar making no connections there! and disappears back into the engine bay away from the pins it is earthing at the A-pillar!
Once through the big grommet it drops down over the wheel arch ..
..and appears to go straight to the power steering kit!!!!!!!???
This is not my car but notice the fat earth.
Could this group of connectors be it??☹☹, some kind of earth strip across all three? The only problem is I can't get at without taking the bumper off
.
One point worth mentioning. As Edward commented above and I had noticed the wring diagrams show a lot of kit use Earth 119, predominantly at the front of the engine bay, (or logically connected to it, eg. Climate), radiator electrics, headlight, headlight washers, power steering...I feel I am getting warm.
The hunt goes on.
Andy