Your test is similar to how mine has behaved (before switching to LEDs). I think it took four pairs of ceiling lights (two per fixture, so 8 bulbs) before the fan came on.
If you’re not plugged in, you’re not using the converter. The converter’s job is to convert 120V to 12V.
I don’t know what’s up with the monitor. I can’t imagine a way the monitor would drop when the trailer is plugged in. Where else would it be measuring its voltage?
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-Scott, DW, DG, DB, and DD
2011 Passport 2590BH
2009 Ford F150 SuperCrew F X4 5.4L w/Max Tow
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