2008 Suburban LTZ w/ automatic temp/fan control

Replaced the resistor with OEM replacement (still no fan operation)
There was no physical dmg detectable on the circuit board or connections for the resistor but i replaced it with a new one anyay
Hard wired fan to check function (it works)
No fuses blown
AC is cold and runs in the rear (just no front operation)

The resistor is a two plug type. Black and purple wires go to the motor. Red, black, and purple w/ white wires are the other connection.

I have 13v at the black and red wires coming from the control module, but no voltage going to the blower motor.

Please help, i've searched everywhere and i cannot find the proper wiring diagram fro this year and resistor type. Is there something behind the climate controls i should check?

Thanks

 

This is not really a resistor, but rather a solid state control module. Check the speed-control voltage on the Purple/White wire. With the connector plugged-in. You should see 1V(hi) - 11V(low) as you change the fan speed settings.