Have a 2004 260 DA. I think my...
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08-02-2019 08:30 AM
Have a 2004 260 DA. I think my question is crazy but wanted to throw it out there in case I was wrong. So I have something draining my batteries even when on shore power and battery charger on. A mechanic is telling me the stereo is still pulling current even when turned off. I know that to be true, but he is trying to tell me that the current being pulled by the stereo is stronger than the power from the battery charger and therefore I have to disconnect my stereo or I will continue to have dead batteries. Almost every boat out there has a stereo and I believe he is full of crap. Is it possible the current from stereo is greater than the onboard battery charger?
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08-02-2019 08:37 AM
The stereo memory power is very low, around 10-100mA.
The AC/DC battery charger provides 10 to 100 A PF charging current, depending on the model.
Normal diagnostic procedures will permit identification of the problem(s) draining / failing to maintain the battery charge.
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08-03-2019 09:50 PM
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08-04-2019 04:42 AM
Step 2: you have a very heavy pull on your batteries, if it is less than 10 amps you should be able to put your digital Volt ohm meter (DVOM) in line of the positive or negative terminal and read you amperage draw. (you can find you ture videos on how to do this if you are not familiar)
Step 3: start pulling fuses until the large amperage draw falls off.
Step 4: Identify everything on that circuit and start unhooking those items one at a time, again looking for the amperage drop.
**Note: anything under 100mA is considered a normal draw.
***Additional note: all of the above tests need to be performed with the battery chargers turned off. I guess another possibility that needs to be worked out is to determine if the battery chargers are even charging properly. (I would confirm this prior to jumping into the above steps, other than step 1)
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08-04-2019 04:48 AM
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08-04-2019 05:47 AM
The other way is to have a volt meter on your battery and watch the draw and disconnect devices one at a time and watch voltage drop. When you find the high draw that is it. Problems like this drive mechanics nuts.. Good Luck!
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08-04-2019 09:09 PM
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08-06-2019 07:16 AM
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08-06-2019 06:43 PM
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08-09-2019 06:03 PM
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08-10-2019 05:37 AM
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08-10-2019 11:37 AM