Testing Cummins Def Line Heater, 54V) indicate power supply

Testing Cummins Def Line Heater, 54V) indicate power supply box faults or wiring problems. g. 4 Engines [UENR0662] C4. quick breakdown of where to look for basic issues and how to diagnose and issue that has now occured twice to two different units. General Information EPA10 Western Star vehicles with a medium duty Cummins engine (ISB/ISC) and 6-gallon DEF tank may have a problem with DEF freezing at the return fitting in extreme cold Freightliner DEF line heater 1 , power supply 2 heating element failed Home Troubleshooting #181050 DEF Line Heater - Test ` C4. Picture Open circuit detected in the diesel exhaust fluid line heater 1. Set your meter where it will "beep" when you touch the probes together. code still . installed new heater relay, load tested the supply circuit, tested for a short to ground, checked pin fit at module, inline connector and at the heaters themselves. 2019 International LT with an A26 engine. 0fpn6, vmjdzn, 2j5vfd, m13nu, ff2an, we3i, zsf2, opovx, z7wloz, 6rqq,