To find the correct fuse or relay:
1. Consult your owner's manual: This is the best place to start. The manual will have a diagram showing the fuse box layout and what each fuse protects.
2. Check the fuse box(es): 1989 Buicks typically have one or more fuse boxes, usually located under the hood and sometimes inside the car (often under the dash). Look carefully at the diagrams in the fuse box lids. The fuel pump may be listed as "Fuel Pump," "EFI," "Electric Fuel Pump," or something similar.
3. Look for a fuel pump relay: This is a separate component that controls the power to the fuel pump. Its location also varies by model, but it's often in the same area as the fuse box(es).
4. Use a test light or multimeter: If you can't find it using the manual and visual inspection, use a test light or multimeter to trace the circuit. This is more advanced and requires some electrical knowledge. Caution: Be careful working with automotive electrical systems.
If you can provide the specific 1989 Buick model (e.g., 1989 Buick Regal), I may be able to provide more specific information. Searching online forums specific to your Buick model year and type might also yield helpful information.
