Once you know the engine code (e.g., 2.6L, 4-cylinder, etc.), you can try these methods:
* Online Parts Websites: Websites like AutoZone, Advance Auto Parts, Napa Auto Parts, and RockAuto usually have diagrams available when you select your vehicle's year, make, model, and engine. These diagrams are often interactive, allowing you to zoom in and click on parts for more information.
* Repair Manuals: A repair manual specifically for your 1988 Dodge Ram 50 with the correct engine will be the most comprehensive resource. These manuals often contain detailed engine diagrams, exploded views of components, and wiring diagrams. You can find these manuals online (e.g., eBay, Amazon) or at auto parts stores. Haynes and Chilton are popular brands.
* Factory Service Manuals: These are the most detailed manuals, directly from the manufacturer. They are typically more expensive than Haynes or Chilton manuals, but offer a higher level of detail. Finding one for a vehicle this old might be challenging.
* Online Forums: Dedicated automotive forums (like those specific to Dodge or Mitsubishi trucks) could have members who have already posted diagrams or can point you in the right direction. Mentioning the engine code will greatly increase your chances of finding helpful information.
In short: Find your engine code first. Then, use the code to search on parts websites or look for a repair manual for your specific year, make, model, and engine.