@Charlie69
Many public libraries have a reference manual section online via the internet that includes an auto/truck repair manual. Just register for a library account, then ask a librarian how to access the auto repair manual(s). You can even get links to portions of the manaul, such as the following:
85 Nissan 720 & Pathfinder Wiring Diagram
http://arrc.epnet.com/autoapp/8585/chil ... 856117.pdf