So I tried hooking up my voltmeter to the battery (2 - 6 volts) and put the mode to 10 amps, and hooked the positive voltmeter wire to the negative battery wire (wire disconnected) and the positive volt meter wire to the negative battery terminal. It didn’t move at all, nothing on the voltmeter. Am I missing something here? If the trailer is closed does the breaker box get disconnected or something?
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