Originally Posted by 1stjeep09jk
About to install a 20 inch light bar on my front bumper, what is the easiest way to run the wiring? Is there a removable plug in the firewall like some vehicles?
Yes, it is on the drivers side under the hood. It is a black plug. It is located on the far left side towards the top. You will see other wires running into it. Just pop the plug off and remove it. Be carful, do not ruin the plug, you will need to re-insert it after poking a hole in it to run the wires through. You want to make sure the plug gets re-installed or you will get water through the hole.
The easiest way I found to run the wires is to run them from the engine compartment into the cab through the hole.
Open the Hood, prop it open.
Find the Plug
Remove the Jeeps interior side panel located next to the dash. You will see it with the door open.
Use a Panel Puller wedge tool to remove the panel (NOTE: Use caution, be carful not to damage our gouge the panel) The tool is available for a few bucks at any Auto store. DO NOT USE ANYTHING METAL OR A SCREW DRIVER, YOU CAN DAMAGE THE PANEL>>>>
Remove the panel an do not lose any of the plastic clips (White) or the panel will not remount correctly
Using a coat hanger or a good wire fish tape, feed your wires through the hole from the engine compartment to the inside of the cab. with the side panel pulled, you will see the wire coming through towards the underside of the dash. Grab the fish wire you used and pull it through gently until you get your wires. Pull the wires through to the length you need.
Wire up and mount your switch your off!
PS Make sure to use the correct gauge wire and the proper relay and fuses that match your switch. Check the Amps on the lights you are connecting and make sure the relay and switch can handle the amps..