total bitch to get to, if you can't get under there with a multi
OR can't get access via your gearstick console...
then you'll have to disconnect your tailshaft...and your bellhousing from the block...and lower it down and fiddle round.
my t50 20 spline one was pretty r00ted when i looked at it, still worked tho..
check your 'lamp' fuse too.
/T