Gx470 2006 reverse light always on

Question for all the typos and errors.

Check the continuity of the earth on that side. It looks like your headlights are controlled by the BCM.

Fuse Box Diagram Nissan

https://fuse-box.info > Home > Nissan
Fuse box diagram (location and assignment of electrical fuses and relays) for Nissan Navara / Frontier (D22; 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004).

google 2014 VW Jetta SE 1.8 fuse box diagram for more info and images.

https://www.autogenius.info/volkswagen-jetta-6-2011-2016-fuse-box-diagram/

If they all look the same then a wiring diagram wouldn't help much. May I suggest that you get a 12 volt test probe/light and find out which of the 3 white or green are Positive and which are negative. Once you know that, if these are the only wires going to the tail light, one each should go to the brake light, parking/driving lights, and reverse light. Now you can simply trace the wires to the individual bulbs to know how to connect them. Additionally, wires usually follow a path and even when broken/chewed apart, you can sometimes identify which wire goes to the other by the positioning.

The problem is you , not knowing how to diagnose the problem . Just replacing parts ! Looking at a wiring diagram to see what all is involved in making reverse light's work an then using a DVOM - digital volt ohmmeter to test the electrical circuits is how it should be done . Free wiring diagrams here http://www.bbbind.com/free-tsb/ Enter vehicle info. year , make , model an engine size. Under system click on lighting , then under subsystem click on reverse lamps . Click the search button then the blue link . Looking at the diagram I see control modules involved , plus a relay . Your best bet mite be to take it to a qualified repair shop.

Right side turn/brake light wire is green. Running light wire is always brown on all four cornets. Left/drivers side turn/brake is always yellow. This is pretty much a universal standard.

I looked at wiring for the 2.8L engine. The relay should be under hood passenger side on strut tower, fender lining. If more than one relay and your not sure which is which, look at wiring diagram for fuel pump relay and compare wire colors.
www.bbbind.com
has free wiring diagrams.
www.autozone.com
also has free wiring diagrams.

Did you check the bulb's ? Fuse's ? Just the right side reverse light doesn't work ?

The fuel pump relay is located under hood, passenger side, front side of wheelwell, mounted in relay panel. Here is wiring diagram of fuel pump circuit:

seems you have several different problems. High beam working and no low beams=dimmer switch is bad. Reverse lamp not working=bulb socket bad,wiring broke,bad ground at back
Brake light on drivers side stuck on=brake light switch

You don't really need a diagram, it's simple. If you open both tail light boxes in the trunk you will see at the connector on the bottom a yellow wire in the first position. That goes to the brake bulb. If both tail lights do not work, make sure you are getting power to the driver side light first, if it is not getting power, the passenger side will not work either, they are in line with each other. If it is only the passenger side not working, the bridging wire could be bad.. try jumping it. Also, make sure you are getting power inside the tail light bulb holder. The metal connections can come loose. If there is no power to the driver side tail light it could be the bulb failure relay, that is the round red relay in the rear left side of the fuse box behind the ash tray/ cigarette lighter below the radio in front of the shifter. You should be getting power to the third brake light in the rear window...that is a different circuit and will not be affected. Try changing out the bulb failure relay, it supplies the power to the tail lights.