[Solved] Where in the brake system can cause battery drain?
1999 Honda Accord
My battery died. It was old. Jumped it a few times. Starter good. Alternator good. Had this happen a couple times over the past 20+ years. Thought it was just a battery eventually going bad. So I replaced it with a battery from Costco.
But then after replacing it, driving around a bit, I noticed my brake lights staying on when parked and the car off. With this information, my guess is that there is something in the brake system that is being left “on”. Thus causing parasitic drain. But what could that be?
I had to leave the car since I am traveling for thanksgiving. I made sure to remove the negative battery terminal, as to not drain while I am gone. Hoping to delve in deeper when I get back next week. In the meanwhile, looking for possible solutions to this problem. Thank you for your insights.
Faulty brake light switch on the pedal? Missing ground connection?
I noticed my brake lights staying on
probably the brake switch, it's cheap.
If the issue persists then it requires a more in-depth diagnosis - like this: