Wiring Question with Regard to Trailer Hitch Plug

I have added a Rigd tire carrier to my 4R. I had to move the license plate and add led lights for the plate. I have run the black and read wires neatly trough wire loom and mounted along the hitch, up underneath the bumper and spare tire, where I can tap the two leads into the wire loom for the 4 prong hitch plug.

Getting the plug apart does not appear simple, but I can push back the factory look and tap into the lines. I know the green and yellow lines are for the blinkers, or at least they should be.

Can someone tell me which color wire is the ground and which is the power? I the factory plug is completely sealed, so I cannot tell which wires are connected to the first two plug pins (ground and power).

Any help would be greatly appreciated.

 

Edit: delete - not relevant.

 

Does this help you?

 

The trailer plug harness it just a short little section that plugs in, you can remove it and tap in where you need to. The 7 pin plug is labeled for what wire does what, a simple test light will confirm it’s doing what you want it to do. I used the reverse light circuit to add a reverse light in my bumper and I used the tail light circuit to power the license plate light.

 

Thank you for that info. I found the same info in tech doc, so your post allowed me to confirm the info. Just what I needed.

 

What I did was to get a Trailer Plug Adapter 7 Pin Flat Blade to 4 and 5 Round Trailer Connector Trailer Adapter https://www.amazon.com/gp/product/B082VV29H8/ref=ppx_yo_dt_b_asin_title_o09_s01?ie=UTF8 and a 5-Way Male and Female Trailer Wire Connector https://www.amazon.com/gp/product/B005XWNCHS/ref=ppx_yo_dt_b_asin_title_o08_s00?ie=UTF8 to tap what I need

 

Thanks for that suggestion, but I need the plugs for connecting my trailers. I found the answer I needed.