Hello. The truck is a 2012 Ram 4x4 diesel auto with 160K miles. No matter hot or cold temperatures the issue persists. With engine running and hi beams applied, there is a temporary hiccup in the electrical system. Whole electrical system will shut down for a split second and then pop back on. Lights will blink off, engine will stumble, and gauges and radio will shut down. And as fast as everything shuts down it will come back to life. This only happens with the hi beams on. Truck has new batteries and clean terminals. Thank you for any help in advance.