Guys,

Here's another popular question that we get from our GTM customers. We wanted to get this up on the forum for easy access. With the help of Shane Vacek at VRaptor, we created a map that shows you which MASTERCELL input wires connect to the different terminals on the connector on the C5 Corvette column. These are your connections for your horn, turn signals, 4-ways, headlights, parking lights and high-beams. Here's the list.


  • Pin D – Connect to ignition switched Ground
  • Pins Z, X & W – Connect to Ground
  • Pin V – Horn input to MC
  • Pin R – Park lights input to MC
  • Pin L – Low Beam input to MC
  • Pin K – High Beam Input to MC
  • Pin G – Left Turn Input to MC
  • Pin F – Right Turn Input to MC

Always use the configuration sheet that came with your Infinitybox kit as the guide for the MASTERCELL input wire colors. You can download our GTM configuration sheet by clicking this link.

There is also a blog post on our website talking in more detail about wiring the MASTERCELL inputs to the C5 Corvette steering column connector. Click on this link to see this blog post.

Please let us know if you have any additional questions about wiring your GTM with our Infinitybox system. You can contact our technical support team by clicking this link.