So I completed the WT mod and now how do I test for ac noise? I know I should have done this first but didnt think about it. I also know its in here somewhere but cant find it. Help a guy out. 

1 hour ago, jlwelding said:

So I completed the WT mod and now how do I test for ac noise?

 

Same way you would before you did the W-T ground wire mod. So take your DVM and red probe you touch the BATT post on the alternator and then the black probe you touch to the passenger battery. 

Ok I know on autos this helps with TC lock and shifting and such but whats the biggest advantage for a manual truck?

1 minute ago, jlwelding said:

Ok I know on autos this helps with TC lock and shifting and such but whats the biggest advantage for a manual truck?

 

On manual trucks the AC noise affects the cruise control like on my truck say I could set for 65 MPH and holding good for several miles then all of sudden it would surge up another +10 MPH from AC noise then decelerate below the set point -10 MPH and continue the cycle till the field lead was unhooked then the problem stopped.