some1 on my acura board bought this and i am completely unfamiliar with it. im assuming its from a tractor trailer or motorhome. 24v ballast? any info would be great. i told him he has a useless part for his cl. thanks.

heres the auction
http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&rd=1&category=36476&item=2439874916#ebayphotohosting

It's for a 24V electrical system; some motorhomes and military vehicles have those.