bankz5152
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Before I run another earth back to the battery I wanted to double check this is actually an earth point!
Bulkhead Earth?
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discool
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Test the continuity/ resistance at the point, if ok use it, it appears to be just a retaining bolt at the moment and attached to what you don’t say 
inner wing?
inner wing?
bankz5152
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Its on the bulkhead behind the expansion bottle.
My bulkhead earth stud is just next to the fuel filter on my TDI. It’s an M8 stud from memory. That in your photo doesn’t look like mine.
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I think that's just a tab for holding the plastic thing next to it. Having said that, if there's good continuity between it and the battery, why not? I used a bolt on the other side of the bulkhead as an earth for my auxiliary instruments about three years ago, and they're still glowing away brightly. However, if this is for your lights, maybe it's worth going all the way back to the battery box. With mine I've made an auxiliary earth by putting a ring terminal on the end and using the battery terminal clamp bolt - 8 mm in diameter as I recall.
bankz5152
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According to this it is a main earth point, or at least thats how I see it lol
Either way it now has 16mm cable running direct to the battery.
Either way it now has 16mm cable running direct to the battery.
Hicap phill
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Are the earths pushed into thatwhite box/connector & causing all your problems?
flat
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Can’t tell by looking - test the continuity.
bankz5152
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flat
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Yeah basically, that’s exactly it, just one lead to the earth point and one to the body or bare metal nearby
Cheers @flat . I have issues with my spot lights and they earth on the bulkhead and I think that might be where the problem is.
Personally, when I test earths, I have one lead stuck to the negative battery terminal, and the other touching the wire I’m testing. I’m not interested in how well the wire is connected to the piece of metal next to it, I’m interested in how high the resistance is between the connection point and the earth termainl. Make sure you disconnect your batter when testing resistance, power plays havoc with readings.
