I have an 03 P71 that runs great. The car needs emissions but every time you shut the car off, it resets the computer, erasing all the data. Does anyone have a link for some wiring diagrams. We've narrowed it down to a wiring issue at the junction box. Any help on this issue would be greatly appreciated. Thanks in advance

 

Autozone web site does have a section for free vehicle wiring diagrams.