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Old 06-12-2019, 03:45 AM   #81
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Default Re: Agile battery separator

on the 10 amp scale, "0.26" is 260 milliamps. (think: a quarter amp is 0.25 amps ... which is 250 milliamps)

If it was trying to show you 9 amps plus 260ma, you'd see: 9.260 (but the final zero is invisible)

So the two meters agree ... and that's far too much current. (any other NCV3 owners care to do a comparison measurement?)

I'm not 100% sure, but i think you're the first (or perhaps only 2nd) person to report the "sleeping" current

more math: let's call it 1/4 amp ... so in 24 hours, you'll have burned 24*1/4= 6 amp hours.
That shouldn't flatten a battery.
In 10 days you'd have gone through 60 Ah, which would be 60% down.

--dick ("far too much": at least twice what i'd expect, and 6 times more than my T1N)
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Get YOUR Sprinter's full configuration datacard by entering your VIN to https://www.datamb.com/
http://diysprinter.co.uk/reference <-- lots of service documentation, Thanks to Jens Moller and Arnie_Oli
((as always: this post may go through a couple of post-posting edits... so maybe give it ten minutes before commenting))

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Old 06-12-2019, 06:11 AM   #82
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Default Re: Agile battery separator

Thanks for jarring me back to seeing clearly, the 1/4A is indeed 250ma, why I got derailed must have been a brain stumble.
So it seems like something is pulling more than it should? I still have the separator ground wire off but I can't see where that would have any influence. The battery may be defective as well as a drain?

Thanks,
Steve
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Old 06-12-2019, 09:03 PM   #83
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Default Re: Agile battery separator

I looked back on the M-B. Work order that the tech wrote the parasitic drain values he found,which ranged from 21-36ma, within M-B specs of 50ma he wrote. I have to think he would read the meters correctly or maybe the test unit just spits it out. There sure seems to be a difference between them and what I'm reading.
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Old 06-12-2019, 09:30 PM   #84
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Default Re: Agile battery separator

But didn't they initially see a bigger drain, then it was gone? Perhaps intermittent then, and getting more permanent now. I have no idea, though, what might cause that.

By the way, do you have a negative terminal disconnect for your coach batteries? If not, you should charge them once a week or they will run down too.
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Old 06-12-2019, 10:19 PM   #85
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Default Re: Agile battery separator

Yes, you are correct that they initially saw a out of spec draw but later said it was OK and it could have progressed like you said. I appreciate the tip on the coach batteries because I checked them today..12.5v. Question, if I reconnect the separator ground wire, will the coach batteries try to charge the depleted starting battery, dragging them down?

I really appreciate the help everyone is giving me as I have to rely on my wife for most checks/tweeks or the dealer, so it's a slow process. It is frustrating for sure

Steve
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Old 06-12-2019, 10:30 PM   #86
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Default Re: Agile battery separator

You don't need to connect the separator. Connect your charger directly to the coach batteries.
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Old 06-12-2019, 11:33 PM   #87
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Default Re: Agile battery separator

I will do that, I suppose I should leave the separator disconnected until I find the drain problem?
Thank you very much,
Steve
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Old 06-12-2019, 11:41 PM   #88
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Default Re: Agile battery separator

Just out of the dark: do you have a trailer hookup on this thing?
If you have one, the NCV3 "snoops" the trailer wires every so often to see if the attached bulbs are OK.
Folks who put LED bulbs in their trailers report seeing the lights blink at times, even with the key out of the ignition.
So if you had one, that's another (completely left field) system that could be causing unwanted current flow.

As for "what happens if i attach the separator ground?" ... use the Voltmeter, Luke.
(but if you put a shore charger on the house side, it may well trigger it to join)
((why i really prefer the "driven relay" style of separator vs voltage-sensitive. Luddite 'old school'))

--dick
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2005 T1N 118" Freightliner 2500 Passenger Wagon (2.7L, 15" tires, standard (short) roof)
Get YOUR Sprinter's full configuration datacard by entering your VIN to https://www.datamb.com/
http://diysprinter.co.uk/reference <-- lots of service documentation, Thanks to Jens Moller and Arnie_Oli
((as always: this post may go through a couple of post-posting edits... so maybe give it ten minutes before commenting))

Last edited by autostaretx; 06-12-2019 at 11:54 PM.
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Old 06-13-2019, 12:48 AM   #89
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Default Re: Agile battery separator

All Agiles come from the factory with trailer hitch, and a continental tire carrier with an extra tail light in the tire carrier cover, because the carrier partially obscures the left tail light. The extra light is plugged into the trailer outlet. The bulbs in the extra light are incandescent.
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Last edited by BobLLL; 06-13-2019 at 12:51 AM.
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Old 06-13-2019, 01:06 AM   #90
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Default Re: Agile battery separator

Steve, I wish I had something more to offer, but what I think I would do is monitor the situation to see if the drain is constant or intermittent.

Reconnect the starting battery, charge it up as best it will for 12 hours, disconnect the battery, and see if it runs down as quickly as it did before. If so, the drain is pretty constant and maybe it will still be there when you take to the dealer.

Maybe ask around town for an independent shop with a good rep for electrical diagnosis.
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