* Ignition Switch: This is the primary component initiating the shutdown sequence.
* Ignition Coil: Power to the coil is cut off, stopping spark.
* Fuel Pump Relay (or circuit): The fuel pump is deactivated, stopping fuel delivery.
* Various Control Modules (PCM/ECM): Depending on the specific engine type (and whether it has fuel injection or a carburetor), various control modules would be involved in managing the shutoff process.
To find the location of relevant components:
1. Consult a wiring diagram: A factory service manual or a wiring diagram specific to your 1987 Chrysler LeBaron's engine will be your best resource. These diagrams show the flow of electricity and pinpoint the locations of relays and other components. You can often find these online via a parts supplier, or you can purchase a complete manual.
2. Look in the fuse box (under the hood): Relays are often found in the underhood fuse box. The fuel pump relay is a likely candidate to examine if you're having issues with the engine turning off properly. Look for a relay labeled "Fuel Pump" or something similar. The fuse box may also have a diagram indicating the location of the relays.
3. Check the under-dash fuse panel: Some relays might also be located in the under-dash fuse panel.
4. Look near the engine control module (ECM): If your car has fuel injection, the ECM is a significant component. Relays related to its operation may be located nearby.
In short: There is no single "auto shut-down relay." The process is managed by a system of components. Your best bet is to use a wiring diagram to understand the specific components involved in your car's system.
