Saw your post and thought I would try to help as I've seen something similar to this before.
Your problem might be due to a resistance change between your LED'* and standard bulbs. This might have been what caused the damage.
I don't know exactly how this circuit is wired in your car without taking a look at a wiring schematic, but its just a guess.
I've seen one of my friends burn up half of his main harness under the hood from changing the OEM bulbs in his factory Fog lights to aftermarket bulbs.
The harness cost $1500 List, but he got off easy cause his father works for a dealership so it ended up costing him $700.
This was due to changing the resistance in the circuit, it was the difference between the OEM and aftermarket bulbs.
I would ask somemore questions at the dealership about what the exact cause was before you put those LED'* back in.
Sorry to hear about your troubles,
92 Bonneville SSEi - Stock - Remaining repairs needed due to neglect by previous owner - ABS/Trac, AC.
Mods so far: Maganflow High flow Cat, Rebuilt */C
Future Mods: Interior swap for Leath, High Output Altenator, Crazy system, Climate Control swap & Custom Exhaust/Intake.
98 Dodge Stratus - Wifes Daily Driver
92 Dodge Shadow - My Winter Beater