* Repair Manual: A Haynes or Chilton repair manual specifically for a 1996 Pontiac Grand Prix will contain detailed wiring diagrams. These are readily available online and at auto parts stores.
* Online Automotive Repair Databases: Sites like AllDataDIY or Mitchell 1 (subscription required) provide comprehensive wiring diagrams and other repair information. These are professional-grade resources, so expect a fee.
* GM Service Manuals (if you can find them): Genuine GM service manuals are the most accurate, but they are often difficult to find and may be expensive. You might check online used booksellers or specialized automotive parts websites.
* Your local library: Some libraries have access to online repair databases or may have hard copies of repair manuals.
Important Note: When using wiring diagrams, always remember safety first! Disconnect the battery's negative terminal before working on any electrical system. Incorrect wiring can damage your car's electrical components or even cause a fire. If you are not comfortable working with car electrical systems, it is best to take your vehicle to a qualified mechanic.