Hi,
Power should be at the switches at all times. When you actuate the switch, it provides a ground path to one of the two wires at the motors. Switching the ground path between the wires changes the polarity of the motor causing it to run in different directions.
So, if you have nothing, we need to start at the fuses and circuit breaker. I attached the wiring schematic below showing the power supply to all switches (highlighted). Go to the top of page 1. It shows a fuse and circuit breaker in the battery junction box. Additionally, it shows one in the central junction box (CJB) in the vehicle.
If you have lost power to all, then I suspect it is either one of the fuses or the GEM (Generic Electric Module) has failed.
Go to the battery junction box (BJB) and locate fuse 103 (50 amp) and circuit breaker 601 (30 amp). I need you to check both for condition and power to and from. Here is a link you may find helpful.
https://www.2carpros.com/articles/how-to-check-a-car-fuse
If they are both good, check fuse 15 in the CJB. Do the same. Confirm the fuse is good and there is power to and from.
Let me know what you find.
Take care,
Joe
See pics below. Note: Pics 1 and 2 are from one page which I had to cut in half to make readable. Pics 3 and 4 are the fuse boxes. Pic 3 is the BJB and 4 is the CJB.
Images (Click to make bigger)
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Saturday, April 16th, 2022 AT 8:05 PM