2 low mod

I got bored today and figured this out. I remember people discussing this, bu wasn't sure if anything was brought from it.

What will this work for?
-ADD equipped vehicles, with Open front diff
-I have J-shifter, not sure if it matters

Caution: Do not Engage/Disengage ADD while moving to prevent damage to unit. Try this at YOUR OWN RISK!

Now on to what it is. On the ADD trucks the 4wd switch in the transfer case is what tells the Transmission Control Relay to actuate the ADD differential for 4wd. Now I don't need this as bad since I have manual hubs, but some of you may make use of it. Naturally I would recomend a "twin-stick" option for better performance and less wear and tear on components, but this will work for now. Pin #7 on the Transmission Control Relay box is the input from the transfer case. When put in 4wd this circuit is closed telling the TCR it is in 4wd. To get 2 low you would put the transfer case is 4low and open this circuit. The white/black stripe wire on pin #7 is what you want to install a switch onto. In 2wd the switch won't do anything. In 4wd Hi and Lo the switch in closed position will be 4wd. When switched to "open" the switch will turn off the 4wd indicator on the dash and disengage the ADD differential.

Now, I'm going to go pick up a switch and wired it in and jack up the front to confirm all of this. I did confirm that cutting the white/black wire in 4wd will turn off the 4wd indicator. Now be careful there are two white/black wires. Refer to pictures for pin #7. You have to take off the plastic at bottom of door opening, then pull the kick panel. From there you can access the Transmission Control Relay and then get to the white/black wire.

-Ryan