To find it, you'll need to:
1. Locate the underhood fuse box: It's usually situated near the battery, often on the driver's side fender well. The cover should have a diagram showing the fuses and relays.
2. Consult the fuse box diagram: The diagram on the fuse box cover will identify the fuel pump relay. It might be labeled "Fuel Pump," "ECM," or similar. Sometimes the diagram uses a number or letter code.
3. Identify the relay: Relays are typically square or rectangular components that you can pull out of their sockets.
If you cannot find the diagram or the diagram isn't clear:
* Use a multimeter: You can test the circuits connected to the relays in the fuse box to identify the fuel pump relay. This is more advanced and requires some electrical knowledge. Caution: Always disconnect the negative battery terminal before attempting electrical testing.
* Consult a repair manual: A repair manual specific to your 1991 Caprice Classic will show the exact location of the fuel pump relay. This is the most reliable method.
* Search online forums: Search online forums dedicated to classic Chevrolets; someone might have already posted a picture or description of the location in their Caprice.
Remember to always disconnect the negative battery cable before working on any electrical components in your vehicle.
