For the module to work properly, it needs to be inline with the TMPS (RCDLR) box. There would be 4 wire connections to be made:
- 12v (Tap into Red/White)
- 0v (Tap into Black/White)
- Low Speed GMLAN (Cut wire, join with vehicle side)
- Low Speed GMLAN (Cut wire, join with TPMS side)
If the vehicle in question does not have TPMS, you would only need the first three connections and they could be made anywhere in the vehicle. The remaining wires are I/O for future features (ie. seat belt reminder option).