Speedometer wiring diagram

[mountaintown88]

This is my first time posting on here. I biught a 1990 jimmy, and previous owner cut of the wiring harness for the dash. I bought a new gauge cluster and I’ve gotten everything to work except the speedometer. Anyone have a wiring diagram for the speedo that they could share with me?!
Any help would be greatly appreciated. I’ve wired in a new guage cluster from LMC.

 

[Wes Harden]

The speedo needs a DRAC module. That interprets the VSS signal to ecm then the speedo

 

[gmbellew]

DRAC is mounted up under the backside of the metal dash, toward the center snd below the radio