Hey I'm looking for some insight on adding a center diff lock switch using existing wiring in the dash?
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I appreciate thanks, also how does this effect the vehicle at hwy speed?Search is your friend, but a tip is to use Google, as the forum function isn't always great. Virtually everything has been pretty well covered, and the FAQ section is a great place to start for anything you could want to know.
Super easy to add the switch. Only a little bit to take off the dash/climate control assembly. Once you get behind it, you'll find a loose white plug with a cap over it, and some foam. You will typically want to relocate the alarm light to the bottom where there is currently a blank (if you have an alarm), and run the CDL switch up top. It is plug & play. Your exact dash configuration may vary.
You can use an actual CDL switch, but it's the same as a hazard switch, which can be had for cheaper. I bought a hazard switch for $20 and made my own CDL icon for it.
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Here is a guide from slee on adding the switch
And here is the optional pin 7 mod, which you ONLY want to do if you first add a CDL switch. Normally when you shift into low range, it automatically locks the center diff. By removing pin 7 in this connector, it disrupts that signal and leaves the diff open, which is sometimes useful in low range on tight trails. With the CDL switch added and pin 7 removed, you have total manual control over the center diff in both high and low range. It's not "necessary," but it's free and reversible.
Center Differential Lock Pin 7 Mod - Slee Off Road
This modification does not have anything to do with the CENTER DIFFERENTIAL LOCK SWITCH (CDL) directly. You do not have to do this, if you just install a CDLsleeoffroad.com