* Under the hood, in the fuse box: This is the most common location. Many fuse boxes have a section dedicated to relays, often clearly labeled. Look for a relay that is either clearly marked "horn" or is physically larger than the others (horn relays tend to be a bit bigger due to the higher current draw).
* Under the dashboard, behind the glove box or instrument panel: Less common, but possible. This would require removing the glove box or some of the dash trim to access.
To find it with certainty:
1. Consult a repair manual: A Haynes or Chilton manual specific to your 1998 Lincoln Town Car will show the exact location and wiring diagram for the horn relay. This is the most reliable method.
2. Trace the horn wiring: Locate the horn itself (usually mounted on the front of the car, somewhere near the radiator). Follow the wiring harness from the horn back towards the fuse box or other potential relay locations. This will require some patience and possibly a helper to manipulate the wiring. Be extremely careful not to damage the wiring.
3. Use a wiring diagram: If you can find a wiring diagram for your vehicle online (though these are sometimes difficult to find for older models), it might pinpoint the relay location. Again, a repair manual is the most reliable source.
Remember to disconnect the negative battery terminal before working with any electrical components.
