Where Can I Find A Free Wiring Diagram For 1993 Chevy Suburban?

I have a 1993 suburban I have just changed  the dash to a 1997 model all the wiring was left the same except the dash cluster . I am having a hard time getting the odometer to work .I have all other guages working but I'm not sure if I am using a wrong wire .Can someone help please, I sure I'm not the only one that has done this before.