You'll likely find several relays in the underhood fuse box (often called the Power Distribution Center or PDC). One or more of these relays will control the cooling fan(s). You'll need a wiring diagram specific to your 1991 Corvette to identify the correct relay(s). These diagrams are available in repair manuals (like a Haynes or Chilton manual) or online through forums dedicated to Corvettes.
To find the relay(s):
1. Locate the underhood fuse box: This is usually located near the battery.
2. Consult your wiring diagram: This will show you which relay(s) are responsible for the cooling fans and their location within the fuse box. The diagram will show the relay number or position.
3. Visually inspect the relays: Some relays might be labeled (though not always clearly). Look for relays that are connected to wires leading to the cooling fan motor.
Caution: Working with car electrical systems can be dangerous. If you're not comfortable working on car electrical systems, it's best to take your Corvette to a qualified mechanic. Improperly working with relays or electrical components could damage your car or cause injury.
