Passenger side tail light not working

Thank you for the reply. I am having a little trouble getting to the vehicle electronic control module it is such a tight spot with a lot of wires. Also to note; I noticed today no parking lights work on entire right side of the vehicle. The tail lights and the two bulbs inside the headlight on the passenger side also do not turn on when I turn on my parking light. I took the connector off the head light it self. Using my meter I measured between the grey/red pin and ground and did not get 12VDC.

I took the actual headlight switch inside the dash apart. I measured between gray/red and ground wire with switch on and got 12VDC. So I am getting the correct voltage at the headlight switch in the vehicle but no voltage at gray/red wire at neither the headlight or taillight passenger side of vehicle.

Yeah, I am positive it was gray/red. There is more wires on the connector for the light switch on the dash then the schematic you just posted. Also, this vehicle does not have fog lights and the light switch is only on or off. I will post a picture of the back end of the connector for the light switch shorty.

Here is a photo of the light switch:

Is this the vehicle electrical control module you were referring to?

That module is under the dash driver side. Behind the fuse block.

Sure thing.
Vin: 3VWDP7AJ5DM212924

This vehicle was purchased in the United States at a Volkswagen dealership.

It is okay I appreciate the help. So I will try to find the electrical control module. It leaves the headlight switch at 12VDC but not making it to the lights. Side note. I ran a jumper wire from driver side taillight to see if it would turn on the passenger side. It did for a few seconds then both tail lights turned off. I had to turn key off and back on to get driver taillight back on. I definitely think it is a computer issue.

Okay so the problem is fixed now. Just posting this reply for future people who might have this problem. So to clarify The right brake and turn signal work but when I turn the parking lights on to drive at night the passenger tail light was completely out. Only turned on when brakes were press then off again

So I noticed the light on the dash that tells you a bulb is out was lit but no bulbs were broken or out.

So how I fixed it was I disconnected the positive cable off the battery. I went out to dinner for about an hour came back home and reconnected the positive cable to the battery and would you not know it. Everything works fine now. Turn the parking lights on for night time driving and both taillights working properly.

So if someone is having this issue and it is not a fuse or brunt out bulb. Try disconnecting positive cable from battery for at least fifteen minutes. Hopes this helps someone struggling with this issue like I was for several weeks and avoids being pulled over at night.