I started a project to see what car parts I could connect to my pc and get working on racing games and my first attempt is with this olds bravada guage cluster (same as 01 blazer cluster) I got the rpm guage and tachometer working correctly volt meter automatically read power from cluster pin ignition 0 (A8) or ignition 3 (A5) reads 12v which is my current power input, but I can not figure out which pins power or control the temp or fuel guages any help?

 

Both are on class 2 serial data line from the PCM.