I have a 05 TL with a 1 amp battery drain issue. Like many other's here the power drawer is coming from thefthe underdash 7 and I have also removed my HFL.

A few months ago, my door lock button stopped working so I ordered one. Then it started working again so I never installed it. Now I'm suspicious of the whole unit given the battery drain.

My guess is it's the MICU. Does that make sense?

Thanks for the help!

 

Since you narrowed down draw to under-dash #7, then any of things listed might be causing the draw. I would leave MICU last, as disconnecting that might get rid of the draw, but that doesn't mean micu is the culprit.

I remember some people mentioned clock going bad, and I believe power window master switch, but I can't find those threads and I don't remember what current those things drew while bad.