* Under the hood in the fuse box: This is the most common location. The fuse box is usually located near the battery, often under a cover. The relay itself might be labeled, or you might need to consult your owner's manual or a wiring diagram to identify it. Look for a relay that's clearly associated with the A/C system.
* Inside the passenger compartment fuse box: Less common, but some models place some relays inside the passenger compartment fuse box, often located under the dashboard. Again, your owner's manual or a wiring diagram will be crucial for identification.
To find it:
1. Consult your owner's manual: This is the best starting point. It should have a diagram showing the fuse box layout and identify the AC compressor relay.
2. Look for a fuse box diagram under the hood: Even without the manual, the fuse box cover often has a diagram printed on it showing the location of fuses and relays.
3. Use a wiring diagram: If you can't locate it using the above methods, you can find a wiring diagram online (many are freely available) or purchase one from an auto parts store. This will show you the exact location and color codes of the wires related to the AC compressor relay.
4. Check online forums: Searching online forums specific to 1999 Chevy Blazers can sometimes turn up helpful information and pictures from other owners who've located this relay.
Remember to always disconnect the negative battery cable before working with electrical components in your vehicle to prevent accidental shorts or damage.
