* Repair Manual: A Haynes or Chilton repair manual specifically for a 1998 Chevy Blazer is your best bet. These manuals usually have detailed wiring diagrams, often color-coded, making them easy to understand.
* Online Automotive Repair Databases: Websites like AllDataDIY, Mitchell 1, and others (often subscription-based) offer very detailed factory service manuals, including complete wiring diagrams. These are generally considered the most accurate sources.
* Online Forums: Forums dedicated to Chevy Blazers (like those on sites like Chevrolet Forum or others) may have members who have shared diagrams or can point you to a good resource. Be cautious, though – the accuracy of information on forums can vary.
* Your Local Auto Parts Store: Some auto parts stores (like AutoZone, Advance Auto Parts) might be able to print out a wiring diagram for you, either from their own resources or by accessing a database. However, the level of detail might be less than a dedicated repair manual.
Important Note: When working with automotive wiring, always disconnect the negative battery terminal before starting any work to prevent accidental shorts or damage to your vehicle's electrical system. If you're not comfortable working with car wiring, it's best to take your Blazer to a qualified mechanic.