* Under the hood, in the fuse box: This is the most common location. The fuse box is usually located in the engine compartment, often near the battery. Look for a large relay with heavy-gauge wires attached. The relay might be labeled, or you might need to consult a wiring diagram.
* Under the dashboard: Less common but possible, it could be located in a relay panel under the dashboard. Accessing this often involves removing parts of the dashboard trim.
To find it definitively:
1. Consult your owner's manual: This is your best bet. The manual should have a diagram of the fuse and relay boxes.
2. Use a wiring diagram: A wiring diagram specific to your 1988 Lincoln Town Car will clearly show the location and connections of the starter relay. You can find these online (often for a fee) through sites specializing in automotive repair manuals or at a local auto parts store.
3. Trace the heavy-gauge wires: The starter motor itself has very thick wires leading to it. Trace these wires back; they'll eventually lead to the relay. Be cautious around the battery.
If you're not comfortable working on your car's electrical system, it's best to take it to a mechanic. Improperly working with car electrical systems can lead to damage or injury.