blew a fuse or shorted a circuit are both of these an easy fix? And I did replace everything with leds. I really dont know if it is the same amparage. But the new once are really bright.
Sorry, I should have said "bulbs of the same ohm rating"...it was late.
Fuse yes, they just pop out and you replace them with a new one with the same amp rating. The way they work is simple. For example, if the license plate circuit has a 5 amp fuse (guessing here), and the LEDs you installed on that circuit combined draw more than 5 amps, then a thin wire in fuse will melt and open the circuit to protect the wiring. (keeps it from getting too hot and damaging the wiring). To fix it, make sure the LEDs have the same ohm rating (or less) than the factory bulbs on that circuit and replace the fuse with a new one of the same rating.
A short will draw very high amperage and burn out the fuse instantly. A Short happens when the positive and negative wires touch each other, and circuit has no resistance.
It starts getting complicated from here. V=iR, so i=V/R, where i=current (amps), V=voltage, and R = resistance in Ohms.
To find a short You will need the circuit diagram to know if the lights are in series or parallel, and an amp meter to locate the short.
If this is Greek to you, replace the LEDs with the factory bulbs and take it to the dealer. If the LED are drawing to much current, the fuse will keep blowing. If the tech doesn't know you replaced all the bulbs and they are the cause, they could spend hours trying to figure out the readings they are seeing until they trace it to the LEDs. When they figure out you replaced all the bulb and caused the problem, it will likely void the warranty repair (I don't know for sure). Just my 2 cents.