there is no residual power in the led. there's a capacitor in the dome light circuit that keeps the dome light on for a few seconds after you close the door. since the led draws less current than an incandescent bulb, it takes a longer time for the capacitor to drain hence it seems like the led is on forever.
but yea, first thing i'd do is revert everything to stock. the way thigns were before you fiddled with everything.
then go in the engine bay and replace that blown 10 amp fuse you have in there.
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