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What do you have to de-activate the air suspension light and system after converting coil springs on a 94 Lincoln town car?

Converting a 1994 Lincoln Town Car from air suspension to coil springs requires more than just swapping parts; you need to address the air suspension system's electronic controls to prevent the malfunction indicator light (MIL) from staying on and to avoid potential electrical issues. Here's what you'll likely need to do to deactivate the air suspension system and light:

* Remove the Air Suspension Compressor and Components: This is the most crucial step. The compressor and related components (air lines, height sensors, air struts themselves, etc.) need to be completely removed. Leaving parts connected, even if disconnected from power, can still cause problems.

* Disconnect the Air Suspension Control Module: Locate the module responsible for managing the air suspension. Its location varies depending on the specific model year and trim level; consult a wiring diagram or repair manual. Simply unplugging it may not be enough; it's best to completely remove it from the vehicle’s electrical system.

* Address the Air Suspension Height Sensors: These sensors monitor the ride height and feed information to the control module. Disconnecting or removing these is usually necessary. Some people have had success with simply disconnecting them. Others have bypassed them with resistors or custom wiring harnesses depending on the sensor type. (Consult wiring diagrams for correct disconnection procedures)

* Deal with the Warning Light: There are several ways to address the air suspension warning light:

* Removing the Bulb: This is the simplest, but potentially the least safe method. The light is there for a reason, indicating a problem. Ignoring it might mean overlooking other potential issues down the line.

* Using a Resistor: A resistor can be wired into the circuit to fool the system into thinking the air suspension is functioning correctly. This requires some electrical knowledge and the proper resistor value. Getting this wrong could damage the system.

* Replacing the Module with a Non-Air Suspension Module: If a suitable replacement module is available that doesn't include air suspension functions, that would be the most appropriate solution. This is the least likely scenario unless you have already worked on the system for other reasons.

* Rewiring (Potentially): In some cases, you might need to rewire sections of the vehicle's electrical system to eliminate any potential short circuits or conflicts caused by the disconnected air suspension components. This is where having a wiring diagram is extremely valuable.

Crucially: Without a wiring diagram specific to your 1994 Lincoln Town Car, attempting this could lead to electrical problems. These diagrams can be obtained from online automotive repair resources (like Haynes manuals), or from a Lincoln dealership.

Disclaimer: Modifying a vehicle's electrical system can be dangerous. If you're not comfortable working with automotive electrical systems, it is strongly recommended to have a qualified mechanic perform this conversion and deactivation. Incorrect wiring could lead to further complications and even damage your vehicle's electrical system.