* Vehicle Variations: The location of the relay can vary slightly depending on the engine, transmission, and other options on your specific vehicle.
* Safety: Working on a vehicle's electrical system can be dangerous. Incorrectly disconnecting or manipulating relays can damage your vehicle or cause electrical shocks.
Here's what I recommend:
1. Consult your owner's manual: The most reliable source of information will be your vehicle's owner's manual. It will have a section on fuses and relays with diagrams showing their locations.
2. Use a reliable online resource: Websites like Chilton, AllData, or Haynes provide detailed repair manuals for specific vehicles. These will offer precise diagrams and instructions.
3. Check your fuse box: The fuel pump relay is usually located in the under-hood fuse box (also called the power distribution center).
4. Professional assistance: If you're unsure, have a mechanic inspect your Blazer and help you locate the relay.
Important safety note: Always disconnect the battery before working on any electrical components. This will prevent accidental shocks.
