Cigarette lighter socket has stopped working and is linked to the rear number plate lights which are working , fuse is ok please help

Fuse 4 does the cigarette light and the side mirrors. Do the mirrors work?
4 15A Cigarette lighter and control system for side mirrors


Fuse 6 does tail lights
6 15A Stop lights
Fuse 14 does the Dash Lights
14 10A Interior lighting and luggage. compartments, clock, radio or radio tape recorder, instrument cluster, central door lock control unit, engine control unit, automatic transmission control unit
If all those fuses are okay, you need a good auto-electrician.

https://fuseandrelay.com/mitsubishi/mirage.html

..

possible blown fuse or bad ground check wiring to make sure all wires are pluged in if so replace lighter

The lighter socket or the element.
Check the element for burn marks and the socket for debris blocking the contacts.

Sometimes the lighter has a small built in fuse. Get a test light and check the center pin of the socket, it it does not have power, take the socket out and check the wire, it the wire has power, the fuse is bad. Sometimes you have to buy the whole socket to get the fuse, but I done know about your particular socket on a Jaguar.

very common for the socket to short out internally. Inspect it then unplug it. If the fuse is ok after you unplg it then you need to replace the socket.

before u pull panel, check for 12vdc with voltmeter inside lighter socket. If u have it, then clean contacts and/or replace lighter(not socket, wiring is fine) May save a lot of work. If you don't have voltage are you 100% sure you have right fuse and not the one below, above, or next to it? I still make mistakes with numbered fuses, which number is for which fuse. To make sure I start counting at 1.

Look in your manual for the Power Distribution Box reference in Roadside Emergencies. It should be located under the hood on the driver's side. My 2002 Explorer has two power points on the center console and the 20A fuses in the Power Distribution Box for them are number 7 and number 9. They cost $3.99 each at AutoZone. The cigar lighter fuse under the dash is unrelated.

start with a test light and check for power at the center of the cigarette lighter socket. If power is good, then check for ground at side of lighter socket.
If no power, run wire from power wire of lighter to power wire of stereo, thus tapping the power directly and bothering to trace out where the open int he circuit may be.

check wiring behind each cig lighter or use test light inside the socket