Where would you find cross reference info for color schemes engine wiring from a 1989 Suzuki Sidekick to a 1991 Geo Tracker?

I have done a similar repair. I had to get the Chilton or etc manual that had the pinouts of the device that I was looking at and do the math from there. Compareing and contrasting. Eventually I gave up when the migrianes set in. ;)

Answer

if you go on eBay & type in Geo Tracker service manuals there are several people selling the actual factory service manuals that the gm employees use i got one and it makes the haynes & chilton manuals look like kids books