Hi,
The power supply is via a circuit breaker. Are you certain there is power out from it? Check at the switch.
I attached two pics below. First is a portion of the wiring schematic. I highlighted the circuit breaker. Pic 2 is of the fuse box in the vehicle. Check to make sure the circuit breaker is allowing power out. Also, confirm there is power to the main switch. It will be a yellow wire. If there is power, it is likely related to the switch.
Here are a couple of links you may find helpful:
https://www.2carpros.com/articles/how-to-check-a-car-fuse
https://www.2carpros.com/articles/how-to-check-wiring
Let me know what you find or if you have other questions.
Take care and God Bless,
Joe
Images (Click to make bigger)
Monday, February 15th, 2021 AT 4:23 PM