Where is the fuel pump relay 1989 Oldsmobile Cutlass Supreme Intl.w2.8 motor. Is it between battery and firewall on side in a little box also right next to 20 amp fuse?

The location of the fuel pump relay in a 1989 Oldsmobile Cutlass Supreme with a 2.8L engine isn't consistently documented as being in a single specific location like "between the battery and firewall in a little box." The placement varies slightly depending on the exact trim level and any modifications the car may have undergone.

While it *might* be near the battery and fuse box as you describe, it's not guaranteed. To find it reliably, you need to consult your vehicle's repair manual (a Haynes or Chilton manual would be helpful). These manuals have wiring diagrams and clearly show the relay locations.

Alternatively, you could:

* Check the fuse box: Often, the fuel pump relay is located in the main underhood fuse box or a secondary fuse box, but labeled differently than "fuel pump relay" it may be labeled something else such as just "relay". Look carefully at the diagram on the fuse box cover itself.

* Trace the fuel pump wire: Locate the fuel pump wire (usually a heavy-gauge wire) and trace it back to its source. This will lead you to the relay. This requires some automotive electrical knowledge and safety precautions.

* Consult a qualified mechanic: A local mechanic can quickly locate the relay for you.

Without a diagram or visual inspection, pinpointing the relay’s precise location is unreliable. Using the repair manual is the most accurate method.