BELOW YOU WILL FIND THE PIN OUT DIAGRAM FOR THE itbc FOUND ON 08 AND NEWER GM VEHICLES. PLEASE REFERENCE THE DIAGRAM TO HELP PROPERLY DIAGNOSE A FAULTY itbc.
Itbc relay front view
(plug lock on top Front View)
pin-a trailer brake supply voltage -dark blue
pin-b ground -black
pin-c itbc relay control -tan
pin-d relay feedback -light green
pin-e solid state relay enable -yellow/black
pin-f battery positive voltage -red/black
GROUND 5-volt - - - can - can+ low ref relay feedback itbc manual apply user gain control - - itbc relay control active low -ign voltage + - serial data enable - - - can - can + - - Itbc manual apply signal - - relay feedback - - - battery Positive voltage + solid state relay enable - - - tcc brake signal not used
