420A Alternator battery problems

[Dragon 3259]

So does anybody know or have dealt with this little problem my battery keeps draining and I've had to buy three new batteries however my alternator when tested is showing that it's putting out voltage but it is not charging the battery any ideas on what could be causing this

 

[pauleyman]

So does anybody know or have dealt with this little problem my battery keeps draining and I've had to buy three new batteries however my alternator when tested is showing that it's putting out voltage but it is not charging the battery any ideas on what could be causing this

Did you check the alternator fuse? A visual won't do either. Unbolt it and test it with a meter

 

[Dragon 3259]

Yes during the test as well it shows it's giving 1.5 amps back but however the battery test shows that it's at 80% and it's a brand new battery and I've only driven it about six seven miles all together I'm not sure why it's sucking down power but it will not keep it charged at least not enough I'm assuming that the battery just can't keep a charge or the alternator is not the right size I know it did have some problems with wiring for a bit there the ECU was not talking and I couldn't get it to connect or do anything took it into a shop because I don't like to mess with the electrical that often usually I tend to burn things out quicker it was working after they messed with it but the alternator is still doing the exact same as it was before shows that it's giving power back but it will not actually put enough in to charge the battery I'm wondering maybe the alternator is not the right size this car states that is a non-turbo however I'm starting to see some tendencies like as if someone tried to convert it to a turbo or had it as a turbo and then when it's set the turbo was removed

 

[danl]

Try adding using punctuation in your posts. It’s difficult to comprehend what you are trying to say.

 

[Dragon 3259]

Sorry about that doing voice to text and it don't like to add everything in and my typing sucks anyways. Lol that was a bit long and confusing I will try to fix that.

 

[97egl]

Yes during the test as well it shows it's giving 1.5 amps back but however the battery test shows that it's at 80% and it's a brand new battery and I've only driven it about six seven miles all together I'm not sure why it's sucking down power but it will not keep it charged at least not enough I'm assuming that the battery just can't keep a charge or the alternator is not the right size I know it did have some problems with wiring for a bit there the ECU was not talking and I couldn't get it to connect or do anything took it into a shop because I don't like to mess with the electrical that often usually I tend to burn things out quicker it was working after they messed with it but the alternator is still doing the exact same as it was before shows that it's giving power back but it will not actually put enough in to charge the battery I'm wondering maybe the alternator is not the right size this car states that is a non-turbo however I'm starting to see some tendencies like as if someone tried to convert it to a turbo or had it as a turbo and then when it's set the turbo was removed

The car would not require a bigger alternator if it was converted to turbo. If someone hacked the wiring harness that may be causing some type of issue.

I'm not sure what you mean by its "giving 1.5 amps back" but if its only charging at 1.5 amps then that would be your problem.

You said in your first post it was tested and is putting out voltage. How was it tested?

 

[dwb]

With the car running, what voltage do you see between the + battery terminal and the - terminal?

 

[Dragon 3259]

The car would not require a bigger alternator if it was converted to turbo. If someone hacked the wiring harness that may be causing some type of issue.

I'm not sure what you mean by its "giving 1.5 amps back" but if its only charging at 1.5 amps then that would be your problem.

You said in your first post it was tested and is putting out voltage. How was it tested?

The guy was using a voltmeter on the battery posts. I wasn't doing the testing due to the fact I don't have any of the tools for that let alone I hate messing with electrical, last time I messed with electrical on a car like this I almost shorted the whole vehicle out and killed the ECU so I tend to stay away from them unless I have the proper tools.

That's just what the guy was telling me was that it was putting out 1.5 amps back into the battery. Made no sense to me either hence why I put that in this. I'm not that great with DSMs and just electrical in general but I am wondering if my harness is jacked up. If that's the case I have no idea where to get a new one, most of the sites I've gone to to check or even the dealership for that matter they don't have one.

With the car running, what voltage do you see between the + battery terminal and the - terminal?

I believe that was where he was saying 1.5 but I'm not entirely sure if he had the proper tester. So today or tomorrow I'm going to try and checking it again and while I'm doing it I will take a video of it and post it on here so that way you guys can see it cuz I don't think I'm explaining it correctly.

We're in a more likely proper way where it's easy to understand cuz even I don't fully get it this is my first time working on a car like this with this many problems all at once I know I should be working on one problem at a time but I'm in a time crunch to get it going.

 

[97egl]

If he was testing at the posts he should have been checking for charging voltage and not amperage.

To check amps he would have had to disconnect the battery terminal and put the meter inline between the post and terminal.

Follow what DWB said and check what voltage you have at the battery teminals with the car running