i was wandering if i could put a manual tc lock up switch on my 97 psd. i know there easy to put on a cummins and i searched how to on a psd but everything that came up said to use the purple wire with yellow tracer.....except my truck dosent have that wire. i found a purple with pink tracer but i dont want to tap into some random wire that i dont know what it does. does anybody have any good links or have done this and knows how? i would really appreciate it if somebody could tell me how!