Theory Of Operation

The Trailer Tow Module (TTM) is used to operate the trailer lamps and lighting system in conjunction with the vehicles various module outputs. The TTM monitors the Controller Area Network (CAN) bus networks for lighting requests from the Body Control Module and other inputs. The TTM itself is responsible for its own logic, actuation and sensing. The TTM is also responsible for trailer light indicator activation sent from it over the CAN bus to the Instrument Cluster (IC). The TTM assures that these lighting functions are maintained synchronous with the vehicles lighting requests as read on the CAN bus. The TTM then sends the appropriate output OFF or ON signal to the respective trailer lights. The TTM also sends an output signal failure to the IC indicating if the light operation has failed. The IC will then display the appropriate indiction.