I want to engage and disengage the VSC. Which essentially will be grounding the VSC trigger wire from the 4x4 module. I personally don't want to hold the button while I'm off-roading to keep VSC disengaged. So I need an on/off type switch. Some people have used a toggle switch but I wanted something a little more OEM.
I'm doing this so my VSC (vehicle stability control) will stop nannying my vehicle while I'm off-roading. In sand, snow, loose dirt if the vehicle is not in CenterDiffLock mode where it automatically turns off VSC it will kill engine power when it feels the wheel slip until it regains traction. I was messing around in the snow a few weekends ago and pulled out of a side street, which was wet so my wheel slipped and my engine power went basically into limp mode while pulling on to a main highway with oncoming traffic. Not ideal. Plus this will help in Pismo where I don't need my center differential locked but don't want to be governed by the VSC.