I shorted my light for my plate in the back and now the radio ,shifter and lights in the back r not working i checked fuses they r all good,now the check engine light goes on....any clues what the *&^%$#@ is going on....thx

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

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First step check fuses. Next step use test light checking for power at license plate. A short will nearly always blow a fuse.

have you checked the headlight switch itself could be a faulty light switch

i would check fuses first then check for power to dashboard insterment panel

1st, have someone step on brake pedal while you check to see if your brake lights are working, if yes proceed to step 2, if not check your brake light fuse(Left side of dash fuse#20- 10amp)IF fuse is good replace brake light switch on brake pedal. 2nd Step (brake lights ok) Turn key on engine off, press and release brake pedal several times slowly, listen for a click and and pulse on shifter handle. IF yes you have a shifter malfunction replace shifter assembly. IF no, inspect shift interlock solenoid and or relace solenoid and cable. You should see a small access cover about the size of a peanut around base faceplate of shifter assembly use small screwdriver and remove cover, use screw driver to press button underneath plate and release shifter into reverse and drive gears(this is manual overide) if you need to move vehicle in the meantime.

yes check fuses

Remove all bulbs on the tail lights and license plate circuit.
Replace fuse, turn on parking lamps- check if fuse blows without any lamps connected.
If it does, check for short circuit to ground on the taillight/license plate wiring.

If it doesn't blow, re-install one lamp at a time until all lights work. you may have a faulty lamp or lampsocket.

first check the illumation fuse which to toyota its the panel fuse, check if it is blown. if not take the aftermarket wire harness u wired in with the radio harness and disconnect the orange wire (illumation wire) and see if u have lights again. sometimes the aftermarket orange wire won't work with toyota vehicles. good luck

Sounds like a short circuit here ? You will need to locate the short circuit . Most probable is the tail lamps and their connections , then number plate lights , then any hinged wiring going from body to a door or trunk (ie No plate illum lights) area . Sometimes the dash dimmer can be a problem . Good luck

Try checking your fuses, you may have a blown one. If the problem reoccurs, or it isn't the fuse, then you more than likely have a short somewhere, where you will need to spend up to several hours with a test light.
Good Luck!