OnStar and Rear View Mirror Wiring (Diagrams Needed OnStar and Rear View Mirror Wiring (Diagrams Needed) Post by I need the OnStar wiring because the power to the mirror comes from the OnStar module and I will simply do a wire tap from Now a ground location at pin 8 can be used as mirror ground (once again OnStar supplied). I can email you the wiring diagram for our vehicle ONSTAR FMV MIRROR INSTALLATION INSRTUCTIONS Pdf To connect power to the OnStar FMV Mirror, follow these steps: 1. Locate the appropriate vehicle power wires in the vehicle (B+ [Battery 12V]. ACC[Accessory/switched 12V]. Gnd[Ground]). Page 9: User Accessed Controls Press and hold the "Phone Button" for 5 ONSTAR FMV OWNER'S MANUAL Pdf Download. OnStar acts as a link to existing emergency service providers. Visit onstar for vehicle availability, details and system limitations. Page 7: Emergency Services An OnStar Emergency Advisor can connect you to the proper authorities so you can help with the situation. 02 Trailblazer Onstar Wiring Diagram. Fan Clutch Wiring Published at Sunday, December 8th, 2019 - 10:22 PM. 02 Wiring Diagram. By Robert C. Battaglia. You most likely know already that 02 trailblazer onstar wiring diagram is one of the trendiest issues on-line today. Depending on the files we got from google adwords, 02 trailblazer onstar wiring diagram has a lot of search in google search engine.