* Existing Wiring: The biggest hurdle is the existing wiring harness. A 1994 van likely doesn't have the pre-wiring for a keyless entry system. This means you'll need to run new wires from the door locks to the control unit, and possibly to the ignition system (for remote start, if desired). This is a significant undertaking requiring technical expertise.
* Type of Door Locks: The type of door locks your van has will determine the compatibility with aftermarket keyless entry systems. Some systems are compatible with various lock types, while others might require specific actuators.
* Remote Start (Optional): If you want remote start, that adds considerable complexity, as it will require additional wiring and integration with the vehicle's ignition system and security system (if equipped).
* Professional Installation vs. DIY: While some technically inclined individuals might attempt a DIY installation, it's a complex job. Professional installation is highly recommended. A qualified automotive electrician will have the experience and tools to properly install the system and ensure it works reliably without damaging the vehicle's electrical system.
In short: Yes, it *can* be done, but it's not a simple plug-and-play installation. Expect a significant amount of labor, which will translate to higher costs. Get several quotes from reputable automotive electricians specializing in aftermarket installations before proceeding. Be prepared for a potentially substantial expense.
