The housing is not hot. It's lacking a ground. The housing is providing the return path for the voltage. Check for loose/missing brown wires.

Sent from my MB860 using Bimmer App

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Ken Kanne, Silverhill, AL, Honorary Forum Grandpa/Craigslist addict/Hoarder of all sorts of stuff
BMW-CCA #441426
1995 318is "Bebe"; 1993 325is "Elvira" 1985 635CSi "Katja" 1984 633CSi "Sylvia"
I NEED A NAP, DANG IT!