STUPID GOD DAMN BATTERY WONT HOLD CHARGE!!

[Justinberni]

Okay.
How much voltage drop is too much?

[Justinberni]

Doing draw test right now.
It started out reading 0.36 amps, then I unplugged my amp fuse and it dropped to 0.02, is this the problem? Is that too much draw?

[Justinberni]

Also before trying to even start it I checked voltage, 12.5 volts, I get in and try and start it and it acted like the battery was dead, I check voltage, still 12.5, so I have a friend try and start it while I read volts, while trying to start it dropped to 4.5 volts, but when key was turned back off it went back to 12 volts?.

Wtf

[flatcat19]

Will it not drop as far with the amp left unplugged?



How is your amp turned on? Key on remote wire?

[Laecaon]

.36 amps is WAY too much. That is also 4.32 Watts of power. .02 Amps is 20milliamps, which is a lot better.

Amp should be connected to Blue wire of aftermarket deck. That is the signal on wire.


The reason for the voltage drop on the battery is that while you have the proper voltage for starting, you do not have the proper amperage for starting. The starter needs ALOT of amps to start, it tries to pull the amps, battery cant cope and voltage drops on your scale, as soon as the you let off starting the car, the amperage pull is gone, and the battery can go back to 12V

The battery is mostly gone. Take it to the auto parts store and have them test the battery, they should be able to tell you if its just discharged or actually dead.

[Justinberni]

I pulled the deck out and the amp was constant hot, not sure how I never fucking noticed that! Fixed it.
I'll get the battery tested in the morning.

[wayno]

I pulled the deck out and the amp was constant hot, not sure how I never fucking noticed that! Fixed it.
I'll get the battery tested in the morning.

If that stayed on even when the key was off, that was likely your issue.

[Justinberni]

That's what I'm thinking, but it's weird that it worked fine for 2 months without dying..