What is the best way to go I bought a ezwring harness and I want to take out the original and replace it with it I know I have to label everything and that and basically remove the whole dash out for sure well as far as I have to so I won’t pull the windshield out that’s a ton of work and I am afraid to brake it so what is everyone suggestion on how to go forward

 

Why are you replacing the harness?

 

Add periods at the end of sentences would be nice. The "ezwiring" is for basic wiring mainly for street rods. Putting it in 1990 is not going to work if it's stock. Best to get an original out of a junk yard an go from there.

 

It is stock and why won’t it work

 

I have a ground somewhere and the wiring is rough

 

Because the ez wiring isn't going to have all the right connections, and it likely won't have a clue about the PCM either....... It isn't a direct replacement by any stretch of the imagination.

What behavior is your truck exhibiting that is undesirable?