* Under the hood in the fuse box: This is the most common location. The fuse box is usually located near the battery. Look for a diagram on the inside of the fuse box lid to identify the relay. The relay may be labeled, or you may need to consult your owner's manual.
* Inside the passenger compartment fuse box (under the dash): Less common, but possible. Again, check the diagram on the fuse box cover.
To find it definitively:
1. Consult your owner's manual: This is the best resource. The manual will have a diagram showing the location of all relays and fuses.
2. Check online forums: Search for "1999 Chevy Blazer blower motor relay location" on forums like Chevrolet forums or general automotive forums. Someone with the same vehicle may have already posted about its location.
3. Use a multimeter: If you're comfortable with basic electrical work, you can use a multimeter to test the blower motor circuit and trace the wires back to the relay. Caution: Be careful when working with electrical systems.
Remember to always disconnect the negative battery terminal before working with any electrical components in your vehicle.
