jvschlegel

2010 Acura TSX, 88K miles, bought from original owner about 2 months ago(guy in his 50's). Car ran fine, then all of the sudden over weekends the battery would drain and not start after not using it. So I jump the battery, and the car would run fine. Now, I'm guessing the battery is getting weaker, and over night the battery will not have enough juice to start the car.

1)took car to advance auto parts, did a battery, alternator and starter test....everything came back fine (to ensure all major electronics working fine)
2)disconnected the positive battery, can see a 1amp draw pulling from the battery with my multi meter(draw is occurring)
3)even with my battery tender on my battery, the battery will drain the next morning to where it won't start. (tried to buy me time until the weekend to trouble shoot some more)
4)disconnected HFL and also the remote start, and draw still exist. No other electronics on the car (HFL is common problem with older models....)
5)disconnected the positive battery terminal, and the battery doesn't drain, keeps at 12.49 volts. (not the battery)

Any hints, ideas where to start looking? With everything hooked up as normal, I can see with my multi meter across the positive and negative terminal a drain that occurs sporadically, maybe every 15 mins or so, but it isn't constant. Looking for advice.

jon

TSXV6Guy

You mention remote start - is this an aftermarket unit? If yes, then check anything that was touched / potentially touched during the installation of the starter system.
What other aftermarket stuff is there? Check all aftermarket units and their installation.
Also, how old is the battery? If it's 8 years old, consider replacing it.

TexasHonda

Suggest disabling circuits by removing fuses sequentially until draw is removed. This Isolates the problematic circuit. Next get a wiring diagram of problem circuit and begin disabling items on that circuit to ID problem component.

good luck