* Under the hood, in the fuse box: This is the most common location. The fuse box itself might be located near the battery or on the passenger side fender well. Look for a relay that's labelled as a "cooling fan" relay, or one that's clearly connected to the cooling fan wiring. The relay might be in a dedicated spot within the fuse box or it might be amongst other relays.
* Under the dashboard: Less common, but some years might have placed it in a fuse box or relay panel under the dashboard. This would require removing a panel to access it.
* In a separate relay center: Some models might have a separate relay center located elsewhere in the engine compartment.
To find it definitively:
1. Consult your owner's manual: This is the best place to start. The manual should have a diagram showing the location of relays and fuses.
2. Use a wiring diagram: A wiring diagram specific to your year and model Cadillac Seville SLS will show exactly where the cooling fan relay is and what its circuit is. You can find these online through various automotive repair resources (some are free, others are subscription-based).
3. Trace the wiring: If you can't find it using the manual or diagram, carefully trace the wiring from the cooling fan motor itself. Follow the wires back, and you should eventually find the relay it connects to. Be extremely cautious when working near electrical components.
Caution: Working with automotive electrical systems can be dangerous. If you're not comfortable working on cars, it's best to take your vehicle to a qualified mechanic.
