To find it, you'll need to:
1. Locate the underhood fuse box: This is usually a large black plastic box located near the battery, often on the passenger side fender well.
2. Open the fuse box cover: There's usually a latch or clip to release it. You might need a flashlight.
3. Consult the fuse box diagram: The inside cover of the fuse box should have a diagram showing the location of all fuses and relays. Look for a diagram that specifically labels relays. The blower motor relay will likely be labeled as such, or possibly something like "HVAC Blower" or a similar description. The diagram will use a symbol to distinguish relays from fuses.
4. Identify the relay: Relays are typically square or rectangular and slightly larger than fuses.
If you can't find it using the fuse box diagram, your best bet is to consult a 1998 Cadillac DeVille repair manual (Haynes or Chilton are popular options) or search online for a specific diagram for your vehicle's year and potentially trim level. Providing your VIN could also help someone with access to more detailed service information pinpoint the location.
