06 3500 CTD. Looking for the info to lockup the tc with a switch. Grounding what wire?

 

Not sure about a 2006 but on my 2005. I tapped the #7 wire from the ROUND plug on the tranny. (plug does have very small numbers showing which is #7). From that tapped wire, I ran it to a switch in the cab. I then went from the switch to a common ground.

So when you hit the switch, it would lock my TC. Turned switch off and tranny worked like normal.

Hope that helps.

 

I dont recommend this unless you got an aftermarket TC.

 

TC is not the problem. Input shaft is in mortal danger though.

 

this will be used for 1st gear only. shifter in 1st gear only+30,000 lbs of trailer.

 

I'm totally clueless on this sort of thing and I have a manual so I'm pretty sure it doesn't even apply to me, but can someone explain this whole concept to me, cause I hear about it all the time and don't have a clue whats going on.

 

just bringing this back, did any of you guys use a resister? i did on my ground wire and mine is till not working. cant figure it out