Here is the install instructions from the 4th gen site as well.
Installation Instructions for 02 & up Dodge Ram High Beam Fog Light Kit.
1) Open hood and remove the driver's side head light. 3 bolts hold it in place. Pull the wiring back from the head light socket to see the wire colors.
2 ) Mount the conversion box to the inner core support towards the top on the right hand side, where the washer bottle bolt is. be sure to install the ground wire. This will be the short wire with the ring terminal.
3) Install a single t-tap on the WHITE wire with GREEN strip from the head light socket. Plug the WHITE wire from the conversion box into this t-tap.
4) Unplug the wiring from the fog light inside the bumper on the drivers side. It will be located on the back side of the fog light. Clean the wiring back and install the 2nd t-tap into the BLUE wire (or the fog light positive wire). Do not connect to the black wire!! Plug the long loomed wire with the BLUE male connector from the conversion box into this t-tap.
5) Run the long loomed wire with the ring terminal to the distribution box. Under the lid on the far left side you will find a 12V positive source. Mount the ring terminal to the power source and close the lid. Tuck any loose wiring back with zip ties. Check your work and you're done!
**You will notice with this kit your fog lights are on anytime your lights are on, not only when the high beams are on. This is an added safety feature to allow for better daytime running lights, not to mention it looks pretty cool set up like this! If you would rather have control of this and turn off your fog lights with your low beams, then you can connect a switch to the RED wire coming out of the conversion box.**
