Under the hood position. Any known tribal knowledge of what all it controls besides head unit, navi and what would cause a draw on the battery? I pulled the fuse, no draw. I know there is a anti-theft light flashing on it but I can't imagine it being that great of a draw to drain a brand new battery in 4 days of sitting. I've done and drop test on the battery and alternator and all is good there. Just this circuit seems to be the problem. Any knowledge of what is a known issue please let me know.


07 TL Type S 150k miles

 

It controls fuses 5-9 in the under dash fuse box. Fuse 6 in the under dash fuse box controls the HFL, among other things. Unplug your HFL and see if the draw stops.

Lots of issues with faulty HFLs draining the battery. Do a search, plenty of threads on the issue. Good luck!

 

You can also put your hand over the HFL cover, behind the rearview mirror, to see if it's warm.

 

I will try this. I broke the bezel taking it down to unplug the HFL...


Thanks for the feedback.