Passenger side head light is dim

Your ground point is G201 #6 Right side of I/P

On the passenger side fender is the ground for the passenger headlight

That's what my reference says above-so go ahead and try that ground

Here is more information on that fix https://www.2carpros.com/articles/one-headlight-is-dim-or-dull please let us know how it goes.

I have auto headlights and fog lights built into my headlight switch only the parking lights work while the switch is in auto location.

Check fuse # 29, auto headlamp relay, if okay-test the main light switch.

Is it possible that the malfunction switch is causing my passenger headlight to be dim?

You need to find that ground, it is very important that you do. I believe it goes through the dimmer switch.

Please let us know what you find so it can help others