Today I did a small mod to install a dual USB port for the backseat in my JKU. I wanted something to charge box small devices and larger devices such as an iPad mini. Here are the highlights and some of my personal requirements:
* I bought this USB port: http://www.amazon.com/gp/product/B00MNGCDVS
* I chose that port for the dual 1.0 and 2.1 ports, plus the rubber seal cap
* I decided to install this on one side, rather than in the middle (back of the center console). I did this mainly for ease of install in routing the wiring.
* I decided on the back of the drivers side since the firewall is easy to access there.
* I decided to install the port in the plastic pillar cover for the drivers side seatbelt/rear door teether/rear door power. I chose this since there is ample hallow space for the plug, plus it's easy to access with the small plastic door to access the rear door teether bracket and power plug.
* I routed the hot (green wire in the pics; it's what I had length of) along the door sill, through the firewall and zip tied along the wire loom in the engine bay and into the fuse box. Note these are 16 gauge wire.
* I routed the ground (red wire in the pics) along the sam door sill path and grounded it to 1 of the 2 ground spots near the firewall, below the driver dash.
* I did this because I didn't want to mess with tapping in to existing wiring. I wanted this to be switched on with the accessory or the ignition(not always on). I used an mini add-a-circuit to accomplish this. I have used these in the past for small electrical add ons and they work great. Believe they go to a max of 10, so I tried various 10amp fuses in the box. I originally tried the M26 fuse since it's a minor fuse for power mirrors and windows....but then realized it's always hot (for some reason). The USB port has a blue led and I didnt want that to ever cause a silly battery issue. So with some trial and error I found fuse M36 is switched on with the accessory slot on the ignition, which works perfect for this and I have it in there for now.
* Doing some research I THINK fuse spot M9 is an empty fuse that is switched on, so if I ever have issues with M36 I will try moving this to the M9 spot
* For cross referencing, this thread is quite helpful: https://www.wranglerforum.com/f274/wi...es-861562.html
My pics are on my phone and I will be attaching them here in the next few mins. I hope this may help others out!