The ECM (Engine Control Module) on a 1986 Lincoln Town Car is typically located
under the hood, near the passenger side inner fender well. However, its exact position can vary slightly depending on the engine (e.g., 5.0L V8 or other). It's usually attached to the inner fender or firewall. You'll likely find it bolted down and possibly covered by a plastic shroud.
To be absolutely certain, consult your 1986 Lincoln Town Car's owner's manual or a repair manual specific to that year and model. A diagram showing the location of major components under the hood will be helpful.
