VW Electrics bad earths

Hacksawbob

Behind main fuse box in front of (Right hand drive, passenger side) fusebox. there are 2 "crowns" of earths that may want attention. Count how many spades terminals are free so you don't miss any putting them back. might be an idea with all those earths hanging around to disconnect the earth strap from the battery as the fuse panel is still live. You may depending on the state of the terminals want to replace them, use metal ones, not plastic coated as the space between spades is limited. I held each one in a pair of needle nose pliers and wire brushed them.

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Eart crowns behind fuses all shiny

Gearbox, there should be at least one earth going from gearbox to chasssis, some folks add a second just to be sure.

Engine block to left of engine block to engine bay. Particularly on 2.1 injection engines this is a prone point for failure after you have checked the gearbox one above.