Forum Discussion
otrfun
Jul 06, 2018Explorer II
CampingN.C. wrote:Our '16 Ram Cummins SRW came with the OEM ITBC from the factory. With it set to max (10), it will only produce approx. 8 volts of braking voltage (at all speeds). For trailers that only needed 8 volts or less to brake safely, then all was good. If the trailer needed 8 - 12 volts then we were out of luck.
. . . I'd like to hear from folks that have installed a P3 or similar to a Ram that had the factory brake controller and what were the results were.
We installed the Tekonsha P3 as a fix action. It's a simple unplug, plug and play swap. Remove the lower dash cover (below the steering wheel), unplug the OEM ITBC, then plug in one end of an optional Tekonsha P3 pigtail made specifically for the later model (2014+?) Ram trucks. The other end of the pigtail plugs into the P3. No flash or other preset required---works great. EVIC shows the ITBC is inop/disconnected, which it is. We now get up to 12 volts of braking voltage with the P3 whenever we need it.
P.S. Before purchasing a P3 I'd suggest checking the maximum braking voltage on your 2018 Ram ITBC first. It's possible they've corrected this issue on the 2018 with a firmware fix. If you get 12 volts with it set to max, then your ITBC is working fine. Need to start looking at your trailer's braking system for the problem.
About Travel Trailer Group
44,054 PostsLatest Activity: Dec 22, 2025