Spent a couple hours today putting in an always-on USB charger and running four cables from it around the 4Runner, and putting in a phone mount to the left of the steering wheel.
I tapped into the driver seat controls fuse for the constant 12v to power a standard lighter socket that I ran into the center console, then plugged the charger directly into that. I was going to cut off the plug on the charger and directly wire it but I was worried there might be some circuitry in the plug so I just did it this way.
Link to socket/tap
Link to 12v charger
One goes under the steering wheel and up the A-pillar to power my phone mount on the left side. I used a USB Y-Cable to combine the USB data port from my Android Auto head unit and USB power from the new charger to one cable.
Link to Y-cable
Another two go up the center console. One is just a spare, and the other goes to my Verizon access point that sits in the seat back pocket.
Then I ran a USB extension cable into the glove box so I can plug whatever cable I want into that one for the passenger or charging something else in the glove box. All the rest are USB-C cables so I figured one should be flexible.
The phone mount idea I stole from a thread here. Attached a Ram Mount ball joint to the screw hole for the A-pillar handle.
Link to base ball joint
Link to extension
Link to phone mount
Here's my best attempt at drawing how I wired things using a random picture of a 4th gen dash. Red goes from fuse box to the 12v socket, blue is the USB charger, green is the USB extension cable to glove box, pink and light blue are USB-C cables to the center console, yellow is USB extension from head unit, purple is Y-cable, orange is USB-C cable to phone mount.
