RAM 5500 2014. How do I use the Aux switches to run extra lights? Where is the input and outputs? How much power can I run through them?

 

Not exactly sure what you are asking here. It sounds like that you already have some extra switches installed, but no wiring.
An easy way to add auxiliary stuff such as lights, compressor or whatever is to just add some extra fuses in the engine bay and run a heavy wire directly from the battery to the new fuse block. Anything extra you add MUST be fused for protection. Then from this new fuse block, run a wire to the new switches etc.
Here is one example of what is available;
https://painlessperformance.com/prod...part-no-70117/

 

I was wondering about the factory installed switches.Are there connectors somewhere? Are they fused?

 

Sorry, don't know anything about your truck, so cannot answer your questions.
Is it easy to reach the back of the switches? Suggest checking if there is power or wiring going to each switch. That will give you the answer. If there is power going to each switch, then while measuring the voltage, pull fuses until the voltage stops. That will tell you if they are fused.

 

Are they a factory aux. switch? if so a dealer should be able to tell you what they are for. If not you will have to trace the feed and output wires to find where they go. No matter I would only use them as the on-off for a relay and power your lights or whatever you are addling with the relays.