To find the relevant relay or component:
1. Consult your owner's manual: This is the best place to start. It should have a fuse and relay diagram.
2. Check the fuse box diagrams: Located under the hood and possibly inside the car (often under the dash), these diagrams show the fuses and relays and what circuits they protect. Look for fuses related to the fuel pump, fuel injection, or engine control. The relay might be labelled generally (e.g., "engine control relay") or might not be explicitly identified.
3. Use a wiring diagram: A wiring diagram specific to your 1992 Pontiac Bonneville will show the exact path of the fuel pump circuit. You can often find these diagrams online through repair manuals (like Haynes or Chilton) or specialized automotive websites. This is the most definitive method but requires some electrical knowledge to interpret.
4. Trace the wires: This is the most time-consuming option, but you can start at the fuel pump and trace its wiring harness back towards the fuse box to identify the relay. This requires some mechanical aptitude and patience.
Without a wiring diagram, pinpointing the exact relay is difficult. The best approach is to consult your owner's manual and use the fuse box diagrams as a starting point. If you're not comfortable working with automotive electrical systems, it's best to seek professional help.
