Your best bet is to:
1. Consult your owner's manual: This is the most reliable source. The manual should have a diagram showing the location of all relays and fuses.
2. Check the fuse box diagrams: There are usually diagrams inside the fuse box covers (both under the hood and inside the cabin, if applicable) that show the location of relays. Look for one labeled "fuel pump" or something similar.
3. Use a wiring diagram: A wiring diagram specific to your 1994 Dodge Stealth (including engine size) will definitively show the relay's location and circuit. You can find these online through automotive repair websites (often requiring a subscription or purchase) or possibly at a local auto parts store.
4. Look in common relay box locations: Relays are often found in fuse boxes located under the hood and sometimes inside the cabin (usually near the steering column or center console). Systematically check all fuse box locations.
Without the specific engine size and trim level, providing a more precise location is impossible. Remember to always disconnect the negative battery terminal before working with electrical components.
