The fuse for the cigarette lighter (or power outlet) in a 1999 Lincoln Town Car Cartier is usually in the
underhood fuse box. However,
there's no single definitive answer without consulting your owner's manual. The manual will have a fuse diagram showing the exact location and amperage of the fuse.
The fuse box cover itself usually has a diagram printed on it; check there first. If it's missing or unclear, you absolutely *must* find your owner's manual. Trying to guess could damage your car's electrical system.