Hi guys, I had the same issue with my 2004 gs300. No sound but noticed a few drops of water on the connectors of the amplifier. Also 30amp fuse in the fuse box in the engine bay was also blown. Spent hours trying to sort it but no luck. Dried to plugs out with cold air from a hairdryer and how works fine. Water droplets were due to the cold em intent in the boot area.