Hi Joris
My brothers Jeep had wire troubles, it didn't recharge the battery.
Because we're total electrical dimwits (got zapped by 220V twice in a few weeks at work) we just replaced 1 wire at a time.
Time consuming but it worked for us.
Also discovered some wires which ran from nowhere to nowhere.
From seeing myself in the Ardennes the WC 51 driving fast in deep water gets you into troubles because the bumper scoops the water into the enginebay, the WC 52 is "safer"in that respect.