Routing wiring for rear dash cam.

2020 Tundra...any tips on how best to get the wiring from top-center inside rear cab to the side (I figure down the side, under thresholds, up the A pillar and over headliner to the rearview mirror, where I'm mounting forward dash cam unit)? Can I just ease down the headliner at the rear edge, or can I take off the third brake light and push it through from there?

Thanks,
Steve

 

Wow...never mind. Just went into the brutal heat and looked. The headliner 'floats', has a small gap at the edge, I just threaded the wire in like I was flossing. I'll study on removing a- and c-pillars and I've done threshold before...

 

Why would a rear dash cam be fed through the 3rd brake light?

 

I didn't know if removing the third brake light cap would give access to holes in the roof, above the headliner, that I could use to feed the wiring to the outside edge, then the jack for the camera down into the edge of the headliner.

No need, though...I LIKE the way they did the headliner...easy to thread through the gap at the edge!

Have it mostly run, just waiting for a small harness that'll let me get USB power off the mirror (tomorrow), then I'll mount the front and 'ponder' how to mount the rear...it's just hanging off the cable right now.

 

Thanks, appreciate it!
I wound up going between the headliner and the rear seal. The rear seal didn't actually go over the headliner, there was a small gap I could use the molding removal tool to push the wire in. At the rear corner, I was able to slide it behind the molding down to the thresholds, then under them to the front and back up the kick panel, door mold next the dash, then up the A-pillar. Then between headliner and windshield molding (same way as back) to near the rearview mirror where I'm putting the front camera.