* Under the hood in the fuse box: This is the most common location. The fuse box is typically located either near the battery or on the driver's side fender. Look for a relay panel; the AC compressor relay might be labeled or you might need to consult your owner's manual or a wiring diagram to identify it.
* Under the dash: Less common, but possible. This would involve looking at the fuse blocks or relay panels usually located near the steering column or under the glove compartment.
To find it definitively:
1. Consult your owner's manual: This is the best starting point. The manual should have a diagram of the fuse and relay boxes, identifying each relay.
2. Use a wiring diagram: A wiring diagram specific to your 1994 Oldsmobile 88 will show the relay's location and the circuits it controls. You can often find these online through automotive repair websites or forums dedicated to Oldsmobiles.
3. Use a multimeter: If you have a multimeter, you can test the continuity of the wires going to the AC compressor to determine which relay is connected to it. Caution: Only do this if you are comfortable working with car electrical systems, as incorrect testing can damage your vehicle's electrical components.
Remember to always disconnect the negative battery terminal before working on any electrical components in your vehicle.
