Chris -What model Tundra do you have? If I had to guess, I'd say backup camera plug.
Mendonsy -3 wires?? It should be the rear sonar sensors. There should be another plug like it behind the grill for the front ones.
The manual link still works, but it is for 2007 to 2010 model years. I'm not sure it would be applicable for a 2013.
Yeah, there are some wiring changes in the 2012-13 models although not a lot. I have not seen anything available that is newer unless you sign up for a subscription to TIS.The manual link still works, but it is for 2007 to 2010 model years. I'm not sure it would be applicable for a 2013.
I'll have to check the plug location you mentioned tomorrow. It's dark and cold outside and I'm warm and cozy inside.
I looked briefly again today and wasn't successful at finding the plug. Not a big deal since my main objective was to install some supplemental backup lights and I was looking for an easy way to get electric power for them without connecting to the existing backup lights. I don't want them to always come on when I shift into reverse. I ended up running a separate circuit from the battery to a rocker switch on the instrument panel and then to the supplemental lamps under the back bumper. The lamps work, but I haven't checked how much additional illumination they provide in the dark. I used the JC Whitney SKU# JCW-368176