Hi jpfour2, welcome to the forum. I THINK you are talking about one of the red wires shown in this diagram: http://www.hilotrailerforum.com/atta...1-20of-202.pdf
From your description, it appears you are talking about the red wire that exits the Master Switch. If it is not going through a fuse to the Raise/Lower switch, it needs to go to the converter, and it supplies battery power to all the DC equipment in the trailer, such as the water pump, interior lights, and so on. This is shown in this other diagram: http://www.hilotrailerforum.com/atta...-20of-202..pdf
I don't know anything about your Converter, so you'll have to figure out which contact is the DC input for those items.
- Jack
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Hi-Lo 1707T - Tire Minder TPMS on Tow Vehicle and Trailer, 300W Solar Battery Charger, Equal-i-zer WDH, Progressive Dynamics Converter, Fan-Tastic Fan, LiFePO4 battery 12V DC Electrical System, SoftStartRV mounted on A/C
2024 F150 Platinum FX4 3.5L PowerBoost SCrew
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