Originally Posted by MarcS
I have found that if I plug my TT into my truck while my truck is running, I will trip the circuit breaker every time.
If your battery was partially discharged and/or there was a big demand on the system 12 volts (like the heater or several lights - 921 bulbs draw 1.2 amps per bulb) this is certainly a potential outcome.
Additionally, since that current limiter is exposed to the elements, the terminals themselves can become corroded and have a high resistance that wastes current by converting it to heat. The hotter the device gets the lower the opening (trip) current.
Lou and Laura with Bella - German Short Hair Pointer
2008 GMC Sierra 2500HD Crewcab SB Allison Duramax
2010 Flagstaff 8526RLWS - Superglide 3300
HAM CALLSIGN - KC3FFW