Electrickery problem. Bad earth?

[shouldbworking]

Getting intermittent loss of all electrics on my Lancia. I've checked the voltage across the battery and whilst it shows 13v with everything off, it dives to ~8v when running! not sure what this means.

[shouldbworking]

bertelli_1 said:

Check the resistance across the battery earth cable & the 12v feed to the starter. Does it still show 12v with the ign on?

Resistance across the earth cable is virtually nothing. Resistance on the starter feed is also minimal, although I didnt check the voltage. Will check tomorrow.