It seems as if I have a parasitic draw on my Honda Accord. I have an aftermarket stereo system and multiple mechanics thought that was the issue. My car has been in and out the shop for the last 4 months and it's killing me. The last time it was in the shop I told them to leave the system disconnected. I came back from vacation after 4 days and my car was still completely dead. I've had the alternator replaced and I've gone through three batteries in the last 2 months. I find it hard to believe that the Honda dealer, AAA, and two other mechanics cannot diagnose/ fix this issue. Does anybody have any experience with their Honda with this?

 

Please post the information about your car like year, engine, automatic/manual trans. Also any work done on the car or any issues like an accident around when the parasitic draw happened.

Any electrical component on your car can fail and continously draw a current, so it is impossible to say what is the cause of your parasitic draw.

Are you planning on figuring out the problem yourself?

 

No, my car is currently in a shop again. It is a 2010 Honda Accord Coupe EX-.L 2.4L engine. No accidents, no other known damage it just started doing this out of nowhere.

 

Your mechanic should hook up a volt meter to the the battery in series and measure current/amps. The door switch will need to be deactived, so the dome light doesn't come on. A clamp will work to keep the switch depressed. Wait 20-30 minutes to ensure the modules are asleep (shut off). Once you verify the parasitic draw (>0.020 amps), you can test each fuse with a separate volt meter or pull one fuse at a time. When the amps drop on a particular fuse, you'll know that something on that circuit is the likely cause.

Pinehollow Diagnostics on YouTube has a good process to troubleshoot parasitic draws. The method used will work to identify the component(s) drawing power.

 

Go to an auto electric expert who can quickly diagnose it. In the meantime, you can install a "quick disconnect" at the battery post to turn off the battery when you aren't driving to save it from being discharged. Other option is to watch youtube videos on how to track down a battery drain or parasitic draw.

 

I have an aftermarket stereo system and multiple mechanics thought that was the issue,,,,,,

I don't want to sound mean or know it all but a good technician doesn't think what the issue might be, he should diagnose properly and find the cause that way he would know what the issue is
did they do a parasitic draw ??? start pulling fuses and test ??
Doing a parasitic draw , if too high, start pulling fuses one at a time till you find which system is causing the draw ,
any other aftermarket components installed besides stereo ??

 

I am wondering how someone installed an aftermarket radio in a 2010 Accord and not have created some issues as the radio is integrated into the car. Dealerships want nothing to do with aftermarket. I recommend an electrical shop also when dealing with an aftermarket issue.