Runing wiring above the windshield

I want to run a power cable from the rear view mirror over to the A pillar. Any hints to the easiest way? Does not seem like an easy tuck and I thought I'd ask before going all honey badger on it.

Thanks all,

 

You should be able to pull down gently on the front of the head liner and tuck the cable in behind it. I have a Mic wire for my blue tooth and the cable for my remote start antenna ran up from the a-piller to the rear view mirror. I recall it being a pretty simple job. Hardest part was removing the a pillar cover and even that was easy.

 

Come for the food, stay for the info.

 

I had to run my temp sensor wire across the headliner and down the A pillar for my Gentex mirror. No problem, easy job.

 

I had to tuck some wires back there for a dash cam, and it was very easy. Just sorta shoved it up in there.

 

the other option besides shoving wires up into the headliner lip is unfasten the A-pillar cover, unfasten and remove the overhead visor, and unfasten the overhead console and take it down. If you have SRS there is also a little puck on the driver side headliner you can unbolt (it also helps hold headliner in place).

Now you have some more leeway in bringing that corner of the headliner down for a more professional wiring run. Either way both get the job done.

 

I have my ultragauge mounted on the windshield next to my rearview and I just went under the dash to the A pillar (removed cover) and then tucked into the front of the headliner to the mount. Super easy and it never tries coming out. As noted the front of the headliner is a little stubborn to get under but it will go. Once you can get under the lip up front it's easy. But it will hold well once released. The wire is only visible where it comes out and goes to the mount, and since I mounted mine up high, it's only visible is you look for it.

 

This is my 3rd gen Tacoma rearview mirror. Its got power and ground but I have no volt meter. Anyone know what wires to tap for my dash cam? I was going to tuck the cable up around the windshield sil also but decided to buy a wiring harness for the camera with an inline fuse. Then I was looking for power and I figured this would be best. Wouldn't be robbing much power from the rearview mirror at all

Also I'm not sure if the 2nd Gen tacos have powered rearview mirrors or not. Anyone got any ideas?

 

I know this doesn't help since it's unavailable, but check this out.

https://www.amazon.com/dp/B01AYS4JZ4/_encoding=UTF8?coliid=IS0B3M8JRCCN2&colid=17OHKZGZRVGYR

Also check and see what voltage your camera runs on. Most run at 5v, so you'd need a hardwiring kit that reduces voltage.

 

I've got all of that thankfully! But zero knowledge about wiring and much fear of damaging my new truck... That's a Fancy product... Not sure how it would connect to the rearview mirror specifically, but I really would love to get a hold of a wiring diagram for the 2016 rearview mirror harness.. no clue where to find that info tho

 

I'm also trying to figure this out, Jay.
According to documentation on ChiltonDIY, you can test the electrochromic mirror by doing this:

"Connect the positive (+) lead of the battery to terminal 6 (IG) and negative (-) lead to terminal 3 (E)."
"Attach black-colored tape to the forward sensor to prevent it from sensing light."
"Shine an electric light on the mirror. Check that the mirror surface changes from bright to dark."

So I'm assuming terminal 6 (upper row, far right) is +12v and terminal 3 (upper row, 3rd from left) is ground. But I wasn't able to confirm with my multi-meter... seems like I couldn't get the leads deep enough into the connector to actually make a circuit. And I have no idea what the remaining terminal 10 does (bottom row, 3rd from left).

I'd also like to get a wiring pigtail with a connector that will mate with this one so I don't alter any original wiring, but Google is pretty much useless so far. Please let me know if you find anything out.

 

There are these little pin sleeves that press into the empty pins. I was thinking of pressing my power and ground into the empty pins and jumping them over to existing power and ground respectively... However I haven't got a clue which wire does what haha. And I haven't had any luck finding the wiring diagram for that... I'll be posting in 3rd gen for an answer on this because there are some service techs on here I'm sure!