[Bill UK]

Some of the links below may point you in the right direction, the first link
is a PDF download for 1995 wiring diagrams, not sure if its for an import Supra though.
http://myweb.usf.edu/~cbmurphe/95tsrm.rar
or
http://www.supraforums.com/forum/showthread.php?t=362377
http://mkiv.supras.org.nz/links.htm
http://www.supraforums.com.au/forum/index.php
http://www.supraforums.com/forum/index.php