For those of you like me that fried your BIU, I found a MOSFET 3377 like the original to replace the crapped one.
http://www.ebay.com/itm/290965049519?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649
Discovered what to look for on SubOperator's post, but I just want to return to original
http://legacygt.com/forums/showthread.php/diy-05-bl-bp-stereo-heat-switches-mirror-switch-illumination-177954.html