#1 and 4 are a relay. No idea what for.
#2 and 5 are temperature senders. #2 is factory for the gauge; #5 is prolly aftermarket, unless it's for the computer or carb or something.
Tcase wire could be 4WD indicator, or could be digital speedometer, if it was transplanted from a 90-91. Check the tag to be sure. (I know the 208's for 90-91 have VSS for the DRAC; I don't know if there were '205's and if so, if they had it.)
-- A