Appears to be no supply to light switch, fuses ok, if separate supply induced to fuse block they work as norm,does supply to switch come from head light supply system(40amp) fuse in engine compartment! all other lights work.
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If it happened the way you described it. I don't see how it could possibly have damaged anything. I guess what you are saying is that the left tail lights are not working? ("4 way exterior dim lights"???) Touching the tail light wire to the turn signal wire will only cause your turn signals to light up. (I am assuming that the tail light switch was on at the time)
I think it is more likely that the brown wire touched ground. This would make a bright flash, blow a fuse and cause the symptom you are describing...I think you need to check the fuse again.
There are separate fuses for the left and right sides. The left side tail lamp fuse is fuse #7 in the junction block it is a 10 Amp fuse. The junction block is located on the right cowl side inner panel - We are NOT talking about the Power Distribution Center under the hood.
All of the above is also assuming that we are talking about a plain Cherokee, Cherokee SE, Cherokee classic or Cherokee Limited.
If we are talking about any of the Grand Cherokees, you may have a fried lamp outage module.
You have all the fuse locations. I have seen some that after radio was put in did that. usually it turns out that re-grounding the dash or using different power supplies for the radio has corrected it. otherwise, I'd check the light switch and make sure it's OK.
with a test light or voltage meter you would check fuses - if good check power at switch and thru switch when turned on - then relay for headlights - then power at lights - you can use battery post as ground first - then use body metal as ground - this will tell you if the problem is on the positive side or negative/ground side
This means you have a short. I am assuming you are talking about the fog light fuse. Does this fuse blow whether the fog lights are off? or just when turned on?
If the fuse blows when the switch is off the switch is bad too. If the fuses only blows when the switch is turned on you have a short in the wiring or bulb.
I don't know if you have test equipment so first I would say to remove both driving bulbs from their sockets and see if there is corrosion. Fix that problem if there is corrosion.
Then install a fuse without the bulbs and see if the fuse blows. If you have a test light you can bridge the fuse panel without putting a fuse in. If there is a connection you have a hot wire grounding. If there is no problem install one light, fuse or bridge the fuse holder and see if 1 light works. Try each side. This way you can isolate the problem. Then visibly inspect wiring.
As an owner of Jeep Cherokees both older and newer than your model, the following is only a guess. For the older units, the fuel block is located under the left side of the instrument panel. Mid 90s units had the fuse block located in the right side kick panel, behind a cover. Late 90s had the fuse block located in the right end of the instrument panel under a cover. A blown fuse is easy to identify through the clear plastic body. Also, the fuses can be checked with a test light. If replacement is necessary, BE SURE TO REPLACE WITH THE SAME AMPERAGE (i.e. use the same color as the blown fuse for a replacement). Repairing an electric window often requires specialized tools. However, you can check the fuse(s) as you suggested (there may be one for all windows or separate fuses for each door motor), the actuating switches for broken/loose wires, and you can remove the door panel(s) to check the motor wires to see if they are loose or damaged. Check to see if the affected window fails to respond to only the switch on the driver's door or the switch on the affected door itself. This may help narrow down the search Just some general ideas which may be helpful. Dale