OBD II pin 8 and 4 locations?

I am looking for pin 8 and pin 4 on a standard 16 pin obdII plug in, I have a 2001 Isuzu Trooper, and was having problems with my TOD system and I just finished repairing them, now I want to clear the codes, but I cant find pin 8 or pin 4, I tried the upper right pin for 8 and the fourth pin for 4 but that isn't the sequence of numbers I guess. Could some one guide me to the right pins so I can on this thing up, or even possibly send me a link to a diagram of the obdII pin numbers. Thanks a bunch.