Hi all,
Just thought I'd share how I figured how to tap to the dome light since there is no other post about it. This is for wanting to have accessory lights to turn on and off with the dome light. For me, I added footwell lights to my 3rd row as there is no lighting back there for the kiddoes.
First off, I fished a wire from the rear right passenger headliner. The overhead grab handle would need to be removed first. I ran the wire down the B pillar and down under the footwell trim to the rear wheel well.
To remove the housing you can read about it in this thread;
Remove Dome Light Housing
Once you remove the housing there is a small block that houses the electrical. You can pry up at 4 corners with a small screwdriver to release.
Once off, there is a metal housing/cover that simply pops off - just pry up. I left it off after as I needed the extra space for wires/terminals.
You can see with the red and black wires shown which side will give you power and which is ground. You will have to use your creativity here on how you tap/connect to these points - I will leave that up to you.
So far it works like a charm! The lights I installed even dim with the dome light!
Hope this helps anyone looking to do something similar!