Dead battery after sitting a few days.....


Information and questions on GL1200 Goldwings (1984-1987)
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washandy98664
Posts: 88
Joined: Sun Feb 10, 2013 2:45 pm
Location: Vancouver, Washington
Motorcycle: 1982 GL1100 I
1985 GL1200 LTD

Dead battery after sitting a few days.....

Postby washandy98664 » Tue Jul 19, 2016 8:35 pm



I have an 85 GL1200 LTD.
Last year my stater went out.
This year I installed the small hot rod alternator to replace the stator.
I cut the 3 wires from the stator .
Right after i was done, the battery would charge just fine while riding but after it would sit for a few days the battery would be dead.
When I start it up, the battery shows 12.8volts, when I high rev it , goes to 14.6 at the battery.
My readout up on the dash shows only 13.0 at high rev.
If I run the trickle charger it stays charged.
So it seems that I have something discharging my battery if I let it sit for a few days...........
Any suggestions would be great.
Thanks



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virgilmobile
Posts: 7650
Joined: Sun Sep 19, 2010 5:39 pm
Location: Denham Springs,La.
Motorcycle: 1988 GL1500 I
Previously owned
78 GL1000
81 GL1100
82 GL1100 I
83 GL1100 I
83 GL1100 standard
84 GL 1200 I

Re: Dead battery after sitting a few days.....

Postby virgilmobile » Wed Jul 20, 2016 12:23 pm

My first suggestion is a question.
Do you have a Digital amp meter.One that can be put inline and will read 0 to 500 milliamp range?
The process is to disconnect the battery negative cable and attach the meter to it and the cable.This will show how much current is being drawn off the battery when the bike is off.
Then start to unplug fuses till it drops.That fuse feeds the offending part.
Some parasitic draw is normal for the radio and clock memory but (if I remember correctly) it's less than 0.020 amp or less than 20 milliamp.

CrystalPistol
Posts: 261
Joined: Wed Mar 10, 2010 9:07 pm
Location: Shenandoah Valley of Virginia
Motorcycle: 1985 GL1200A
1997 GL1500SE Lehman Trike

Re: Dead battery after sitting a few days.....

Postby CrystalPistol » Thu Jul 21, 2016 9:10 am

How old and what type is the battery itself?

My 1200 .... if I'm gonna let sit a few weeks or month or more, I just pull side cover and unhook battery ground ...... or I plug in a automatic battery charger / maintainer that will do AGM & regular batteries at 2/6/10 amps after a week or two for a while. Just put new Oddysey PC680 in both the 1200 & 1500. My last Oddysey in 1500 lasted 12 years and is still usable (gonna hang it in a pouch and strap to seat of my '74 Trident when I ride it) .... but usually 2-3 years was all I ever got out of a wet cell in the 1200. I don't unhook on the 1500 ..... but the 1200 has displays to maintain besides just the memory and it always seemed to pull a battery down over weeks.
Image

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virgilmobile
Posts: 7650
Joined: Sun Sep 19, 2010 5:39 pm
Location: Denham Springs,La.
Motorcycle: 1988 GL1500 I
Previously owned
78 GL1000
81 GL1100
82 GL1100 I
83 GL1100 I
83 GL1100 standard
84 GL 1200 I

Re: Dead battery after sitting a few days.....

Postby virgilmobile » Thu Jul 21, 2016 9:56 am

I guess I have another question.
The alternator you put on.Does it also have a sense/trigger wire to get it working?If it does,that wire must be a ignition switched wire and not fed power all the time.It too will draw enough current to discharge the battery in a couple of days.
With a add on alternator,the regulator module can/should be disconnected as well.
Your lower voltage readout may be a result of poor connections feeding the voltmeter or the meter it self.A measurement direct across its connections with another meter will tell.

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tylers883
Posts: 56
Joined: Tue May 10, 2016 11:04 am
Location: Halifax, NS Canada
Motorcycle: 81 GL1100

Re: Dead battery after sitting a few days.....

Postby tylers883 » Fri Jul 22, 2016 10:46 am

It is worth noting that starting the bike while the ammeter is in series with the battery may result in an electric current that will exceed the current rating of the fuse on your ammeter. Some fuses are cheap to replace, others are meter specific and will cost you a few coin.




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