Where can I get a copy of the wiring diagrams for my truck? 1989 Toyota Pickup 4x4 short bed 22RE engine. I want to install a wiring connector for towing a trailer. Thanks, Jerry K

A repair manual such as Haynes.

If you have a library card or are a student, you may be able to get them online from home. Libraries and schools subscribe to online databases.

AutoZone.com has some technical pages.