* Under the hood in the fuse box: This is the most common location. The fuse box is usually situated near the battery. Look for a relay panel within that box. The relay itself might be labeled "A/C" or have a symbol indicating air conditioning.
* Under the dash: Less common but possible, particularly if there's a separate relay center under the dashboard. This would require some investigation.
To find it, you'll need to:
1. Consult your owner's manual: This is the best place to start. The manual should have a diagram showing the location of all fuses and relays.
2. Check your fuse box diagrams: Often, a diagram is located on the inside cover of the fuse box itself. This diagram will show the location and function of each fuse and relay.
3. Look for a relay that's the appropriate size and shape: AC relays are typically larger than other relays in the panel.
4. Use a multimeter (optional): If you are comfortable with basic electrical testing, a multimeter can help identify the AC relay by testing for continuity or voltage when the AC is switched on and off. Caution: This should only be done with the vehicle's electrical system disconnected to prevent injury.
If you can't find it using these methods, a search online for a 1992 Chevy Suburban wiring diagram might help. Be sure to specify the engine size (e.g., 5.7L, 6.5L Diesel) as this can affect the location of components. A local mechanic or auto parts store could also provide assistance.
