Makes a pretty good case for a simple switch and a lamp, eh?

Somehow, someone decided that computer controlled everything was cheaper than wires and switchs, in spite of the fact that the wire and switch is still there, and a computer in the tail light to switch the bulb on and a high speed serial cable cost a whole lot more than a switch and a wire.....

Peter

Yep, the system as described in the 1996 schematic makes sense... the 1997 system looks overly complicated just to tell you the coolant is low... there must be a reason, but not apparent to me.
Anyway, sorry this process took so long, but lots of knowledge gained... will have to check my '96 and see how its wired... :-)
Glad information helped.