12 volt system diagram

Where can I find a diagram of the 12 volt system? Particularly the vent fans. I’m replacing the thermostat controlled one with a remote controlled one.

I don't think you'll find a diagram of the 12V DC system that includes wiring to the fan or thermostat.

I would expect that there's power to the fan coming from the main fuse box. If the thermostat is the simple mechanical style, with a single lever to set temperature, I would think that acts as a simple switch to signal the fan to apply power to the motor. 2 wires to the thermostat. If it's a newer digital thermostat for the fan, you'll probably have to look at the manufacturer's documentation.

I have added remote control vent fans. You do not need a diagram, just wire them in.

I figured it out. I deleted the wiring to the thermostat. It works fine now. Thanks for the replies.