What needs to be earthed?

[patrickt]

The biggest deal is that you make sure all your connections are tight and clean. Your crimps need to be fresh, firm and preferably soldered as well. Always scrape to bare metal and use a quality electric contact cleaner like trichloroethane if they let you use that down there. If not, use whatever contact cleaner you can buy. The poisonous stuff always works better than the safe stuff. And always, always, always put a coat of dielectric grease on your connections. It is God's gift to electricity. Now, if you Google it, you will find stupid people saying "why would I possibly put a dielectric compound between connectors? Dielectric means it doesn't conduct, so that's like putting a sheet of rubber between my connectors." Those are the same people that swore the earth was flat because they couldn't see the curve of the earth from their windows. Under a microscope, perfectly flat connectors look like the Swiss Alps, and only the peaks are touching one another when two flat connectors are fastened. Dielectric grease fills the voids on "flat" connections and prevents degradation of the connection. There's only a million studies out there that confirm its wonders. Use it. Always. Everywhere.

[Gaz64]

Originally Posted by patrickt

The biggest deal is that you make sure all your connections are tight and clean. Your crimps need to be fresh, firm and preferably soldered as well. Always scrape to bare metal and use a quality electric contact cleaner like trichloroethane if they let you use that down there. If not, use whatever contact cleaner you can buy. The poisonous stuff always works better than the safe stuff. And always, always, always put a coat of dielectric grease on your connections. It is God's gift to electricity. Now, if you Google it, you will find stupid people saying "why would I possibly put a dielectric compound between connectors? Dielectric means it doesn't conduct, so that's like putting a sheet of rubber between my connectors." Those are the same people that swore the earth was flat because they couldn't see the curve of the earth from their windows. Under a microscope, perfectly flat connectors look like the Swiss Alps, and only the peaks are touching one another when two flat connectors are fastened. Dielectric grease fills the voids on "flat" connections and prevents degradation of the connection. There's only a million studies out there that confirm its wonders. Use it. Always. Everywhere.

Exactly correct. Helps to prevent fretting corrosion. I use it on any connector that is critical for low voltage signal loss, especially electronic throttle control circuit wiring.

[patrickt]

Originally Posted by patrickt

Those are the same people that swore the earth was flat because they couldn't see the curve of the earth from their windows.

And they're the same people that think your oil has to get to 212 degrees Fahrenheit to get moisture out.

[xb-60]

Thanks for the comments and advice.
I have some professional knowledge in, and expertise with, galvanic corrosion. What I really need - and have largely obtained (thanks!) – are tips and tricks, and safety aspects, specific to Cobras .…things like the need for earthing the fuel filler, even though there is no metal-to-metal contact there, aside from the mounting screws/nuts/washers.

Cheers!
Glen