Hi,
According to the schematics, there is a 30amp fuse that simply supplies power to the switch assembly. There is a ground that will need to be attached as well.
I attached the schematic below. Note: The schematic was only a page long. However, I had to cut it in half to make it readable. I did overlap them so you can follow from one to the next.
If you decided to get power from a different source, don't exceed 30 amps.
Here is a link you may find helpful:
https://www.2carpros.com/articles/how-to-check-wiring
Let me know if this helps or if you have other questions. I did highlight the ground and power supply.
Take care,
Joe
See pic below.
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Wednesday, November 10th, 2021 AT 7:45 PM