Hello all new to here. I have a 2009 620i with a powertach plow. Plow works great until it starts tripping the thermal breaker. used to happen every once in a while, now it is starting to happen alot more often. i was told it could be the battery running low on volts, so i hooked up a volt meter to the battery and the voltage stayed around 13.6 volts while the plow was running. so i tested the voltage on each side of the breaker, side closer to the battery always stayed above 12. the other side would drop down to 9 volts and that when it would trip. why is that? is it faulty? can i jump out the breaker to see if it draws the battery down? Thanks for your responses.
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