Where is the ground wire connected under car of a 1996 Lincoln town car?

There isn't one single "ground wire" in a 1996 Lincoln Town Car; the chassis itself acts as the ground. Grounding points are distributed throughout the vehicle. These points are typically bolted connections to the chassis or engine block. You'll find them attached to various components needing a ground connection, like:

* Engine Block: Many ground wires connect directly to the engine block. Look for wires bolted to the engine itself, often near the firewall or other substantial metal parts of the engine.

* Chassis: Several ground straps or wires connect to the frame rails (the large metal beams running along the sides of the car). These are usually bolted connections.

* Body: Ground connections can also be found bolted to the body of the car, particularly in areas near the firewall or where electrical components are mounted.

* Battery: The negative battery cable is a major ground point and connects directly to the chassis, often with a substantial bolt.

To find a specific ground point for troubleshooting, you'll need to consult a wiring diagram for your 1996 Lincoln Town Car. These diagrams show exactly where each wire connects. You can often find these diagrams online (through a parts supplier website or dedicated automotive repair forums) or in a repair manual specific to your vehicle's year and model.

Without knowing the specific electrical issue you're troubleshooting, it's impossible to pinpoint the exact ground wire location. The locations above are the most common places to find grounds. Always disconnect the battery's negative terminal before working with electrical components.