3rd brake wiring

Wanting to know how to wire the third brake light to the trailer brake light plug

 

Tap into the blue wire on the back of the plug.
Be warned. Make sure the tap is weather proof.
If not, you'll have issues about 2-3 years down the road.

 

I work in a boat shop so everything I do is weather proof. So tap power into the blue and just connect ground and done seems pretty simple.

 

You could tap in at the rear tail light.
Less wire to run.

If you want?
If so, I can grab that diagram too.

 

That would help just in case but I have rolls of wire I can work off of to tap into the trailer plug

 

It's also the blue wire.

 

Perfect! Thank you I really appreciate the diagrams