Your Ride: Supercharged 97 M3/04 M3 vert/07 ESCALADE/04 Harley VRSC/
since its a 520 and its not a US model im guessing here.
i would check in order:
bulbs are in.
in working order.
wires/plugs are connected to the bulb.
if the answer is yes to all of the above and your highs worked prior to the lcm being "fixed" i would have to conclude that its a bad lcm or flash.