Originally Posted by billb800si
One last thought.
Check the actual voltage output at the plug. There have been cases where the Ram Trailer Brake controller is indicating higher ( up to Max.) output but the voltage at the pin in NOT 13 volts.
Cleaning all the connections has helped some in the past.
Cleaning has helped some. However, measuring at the plug is tricky due to the pulse width modulation.
On the ealier Rams, it will read 12v because the PWM is close to 98%.
On the 2015, the voltage will read around 7v because the PWM is only 70%.
Here is a 2013 ram on a scope. You can see the 98% cycle.
Here is a 2015. It is measuring a full 12v peak, but the cycle of ~70% is only showing 7v at the plug.