This is for Technical Service in the form of email guidance through explanation of how the system works, wiring diagrams, pin outs, test procedures for the module and various systems it operates. This tech support is tailored to your vehicle's application. Must already own a UD Module re-manufactured module. When ordering this support service enter code found on bottom right hand corner of DRAC label in the form "UD Code". This code is also the same code found on the package the replacement module came in on the shipping and core return label and is an ordering code. Includes up to 20 email responses and is based on a per incident per purchase limitation that is effective for 30-Days after purchase. Must own a Digital Multi-meter for test procedures. This purchase is for email technical support service, no parts are provided.