The VSIM has many hard wired inputs and outputs (through the VSIM jumper harnesses) . Step 1 You can disconnect this system from inside your truck in just minutes with no professional experience or equipment. I lost my key fob and could not get the factory alarm to shut off, The passenger door lock was the secret. 134 people found this helpful. The Vehicle System Interface Module (VSIM) is specifically designed to make it easy to upfit RAM trucks. These systems can be equipped on your Dodge RAM and feature a simple module with an alarm amp to emit the beeping and horn sounds that alert you. It also has J1939 communication bus output signals as well as input commands starting in 2019. 2019 Dodge Ram 2500 The heavy duty models, for example, the 2019 new truck ram dodge 2500, is probably be updated later than 1500 model, that will be way better when it … The 2019 Dodge Ram concept has not been revealed yet as well. 2019 Dodge Ram Factory Alarm System Feature more storage, more performance, more efficiency, more safety features, more technology, and more leather.