The fuse box forum just gave me this idea.
One guy was going to connect the D+ connector to the fuse box in the engine compartment, just so he could have his webcam ONLY ON when the vehicle was on. So he used the USB port in the Transit Connect (which turns on and off with the ignition).
https://www.amazon.com/PEMENOL-Adjustable-Supply-Voltage-Converter/dp/B07V5FPNNZ
This is a 5V USB step up buck converter. So I can plug this into the USB port, run a USB cable to my Renogy 40A DC to DC charger to the D+ signal port.
No need to access the fuse box in the engine compartment anymore just for a 12V signal that turn on the charger.
