Had a dead battery today. Drove the car quite recently- yesterday. Quick boost charge to start, alternator came up fine. Battery charged on a 30 minute drive.
Post driving I shut down and heard a high pitched whine from the engine compartment. Not the CS, ISC or FV. Pulled plugs from those and whine and load remained. Ballast resistor was cool so not the coil. Connected up an instrumented power supply, disconnected the battery and saw a 3.8-4.1 amp consistent load along with the whine. Pulled fuses to troubleshoot-either 4, 10 or 16 eliminated the issue (or just coincidental timing) but the load was gone when I plugged the fuses back in. Didn't get to pull the WUR plug before the whine stopped, and the 4 amp load was gone.
Any ideas?
Best,
Ken