heated mirrors questions

I got a pair of mirrors from a 97+ xj that I thought were heated but what I didn't notice was just the drivers mirror is heated they did put heat on the pass side correct I just happened to get one that only had it on the drivers side that seams strange.

I am also trying to figure out what wire color does what on my 1990 power mirrors I searched to figure out the newer pinouts but could not find a old one, Thanks