After fixing main relay.. Car always drained battery.

[KuLaPhU]

Ok after soldering main relay (7 days ago) I noticed that my battery is always drained out and have to jump start or recharge the battery everyday. I don't know what causes this problem. New battery (less than a yr.) pls. help!

[sonikaccord]

You have excessive current draw, that's what is killing your battery.

The two shouldn't have any correlation. Can you tell us any more about your situation?

[deevergote]

The last time I had that issue, the culprit was my starter. Apparently it's common for a failing starter to be the source of a power drain. It's merely as guess at this point, as there isn't enough information provided to really make an accurate diagnosis... but it's something to look out for.

[KuLaPhU]

The last time I had that issue, the culprit was my starter. Apparently it's common for a failing starter to be the source of a power drain. It's merely as guess at this point, as there isn't enough information provided to really make an accurate diagnosis... but it's something to look out for.

Starter works fine.. I was thinking maybe the car alarm. I have aftermarket alarm installed.. after so many yrs. I lost the remotes and never use it after that.. I will try to disable and unhook it.

[sonikaccord]

I had my compustar alarm hooked up and I think it eventually killed my battery, however, my car was sitting up for a while not being started or ran...

I unhooked it just to be sure but I really don't think that was an issue.

Didn't know that bit about the starter failing.

[KuLaPhU]

I had my compustar alarm hooked up and I think it eventually killed my battery, however, my car was sitting up for a while not being started or ran...

I unhooked it just to be sure but I really don't think that was an issue.

Didn't know that bit about the starter failing.

never had this problem before until I soldered that main relay. is there anything in the main relay that causes the battery to drain?

[cb7 calling]

Ok....I have decided to drop 2 cents. I don't know how the main relay would relate but it might. When you shut the car off after a drive listen for the fuel pump humming. If you hear it open the gas cap. If you don't my two cents is worthless.

[reklipz]

never had this problem before until I soldered that main relay. is there anything in the main relay that causes the battery to drain?

What was wrong with the main relay that caused you to solder it? That would help us diagnose the main relay as the culprit.

It's possible that when you soldered the main relay you created a short circuit between two points that would cause power draw and drain the battery. This would be fairly obvious to anyone who has worked with electronics like this before though. Give us your thoughts on that; are you handy with electronics and a soldering iron?

Otherwise, you could try swapping main relays; if the problem goes away, then you've found the culprit. You could also try unhooking the main relay when you leave the car, and then plugging it back in when you're ready to leave. If the battery stays charged, then we can suspect the relay, or something down stream from it (like the starter).