I can't believe it but I just had one installed on my "03 Tundra last Friday. I paid the dealer from whom I bought my TM $40 to install it while having the TM checked for a noise that I didn't understand. Unfortunately, my Tundra is over 100 miles from my home at the present time. So I can't look under the dash to tell you what colors are connected to each other. Sorr that I can't help. Good luck.