Gentex 261 wiring diagram - the12volt Aug 11, 2021Location: Canada. Posted: November 05, 2004 at 11:46 PM / IP Logged. I am looking for a wiring diagram or pinout connection wiring diagram for the 16 pin connector on the back of a Gentex 261 mirror, (GNTX-261). I would like to test it to see if it is functional or not. Back to Top.