Originally Posted by Dewey7015
The bottom of the package at walmart says 2.1 amp..
Dedicated circuit it is then. You know the next ? Is coming... Anyone know where to get them? Is it called a trailer power inverter? Converter?
Buy it from Toyota. As far as I understand, the OEM trailer wiring harness is the only option for a dedicated circuit. It plugs in to two plugs by the driver's kick panel (one for the converter box, the other for the actual wire), and adds a couple fuses as well as a single RELAY into the fuse panel under the hood. Should cost about $100. At the parts counter of your Toyota dealership, refer to it as a "trailer wiring harness".
The really nice thing about this trailer wiring harness is that if you short something out on your trailer, it won't take out the truck's tail lights with it.
Note that the tail lights (all of them) on the truck, run on a single 10 amp fuse. That includes brakes, signals, backup lights, and tail. It doesn't leave much for running a trailer.