Losing battery power


Information and questions on GL1100 Goldwings (1980-1983)
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Hibachitrent
Posts: 2
Joined: Tue Jul 17, 2018 1:12 pm
Location: Birmingham,AL
Motorcycle: 1982 GL1100

Losing battery power

Post by Hibachitrent » Tue Jul 17, 2018 1:30 pm



I bought a 82 GL1100 about a week ago. It sat for 2 months in there shop and had to be jumped to start. I got a new battery and drove it for a couple days and I started and worked great. Then yeasterday it died but starts right up when jumped. I changed the dogbone fuse and jumped it and drove it to charge the battery and it still wouldn’t start when I got back. What could cause the power loss?



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RBGERSON
Posts: 3207
Joined: Tue Mar 09, 2010 7:57 am
Location: SCOTTSDALE, AZ
Motorcycle: 98 SE GL 1500
had every year from 75 to 83

Re: Losing battery power

Post by RBGERSON » Tue Jul 17, 2018 2:12 pm

Bad battery/cell, stator not charging, regulator not working correctly, bad connections in the starting current.
HAD LOTS OF GOLDWING 75-83
NOW INTO 1500'S..RIDING A 1998 SE

FAIR WINDS,
RB

Hibachitrent
Posts: 2
Joined: Tue Jul 17, 2018 1:12 pm
Location: Birmingham,AL
Motorcycle: 1982 GL1100

Re: Losing battery power

Post by Hibachitrent » Tue Jul 17, 2018 3:49 pm

So it wouldn’t be the alternator? What should I do?

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MikeB
Posts: 2284
Joined: Fri Dec 04, 2009 12:54 pm
Location: Tacoma, WA
Motorcycle: 1998 - GL1500 Aspencade.
2003 - GL1800A

Re: Losing battery power

Post by MikeB » Tue Jul 17, 2018 4:19 pm

I think the first thing I would do if I were you, I'd buy a battery charger meant for motorcycle batteries and charge the battery. I would not depend on the motorcycle to charge a battery after it had to be jump started.

I don't think I would jump start the bike to make a trip, short or long. If I had to jump the battery to get home, the first thing I would do when I got home is charge the battery for the specified amount of time. Then I would do some electrical system troubleshooting using a Volt Ohm Meter.

You are looking for at least 12.65 volts on a battery at rest on the bike. While running at 1200 rpm or more, you are looking for 13.5 to 14.5 volts.

If you have that, you have a parasitic current drain that is sapping your battery. To investigate that, look up Videos for Parasitic Voltage Testing on the internet.
MikeB
Tacoma, WA, USA

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DWade1990
Posts: 90
Joined: Thu Apr 27, 2017 7:27 pm
Location: Akron, OH
Motorcycle: 1976 GL1000
1983 GL1100 Aspencade
1981 CB750K
2006 FJR1300

Re: Losing battery power

Post by DWade1990 » Tue Jul 24, 2018 6:51 pm

Get your hands on a Battery Tender Jr. You can get them at just about any parts store. Pull the battery out of the bike, make sure all of the cells are full. If they're not, top them off with distilled water and charge it overnight until the LED on the charger is steady green.

While the battery is charging, take a look at the electrical connectors on the bike. The big one to pay attention to is the one with three yellow wires coming from the back of the motor. There is a connector behind the side cover, right next to the battery. Disconnect the plug and check it out. Make sure you have a good, non-corroded connection on the pins. You should see clean metal where the pins drag across each other. This is the output harness from the stator, and it's where all of the power passes through for the bike, and a good connection here is critical. It's not uncommon for these connectors to melt because of the added resistance of a loose or dirty connection.

If the connection doesn't look good, clean it up and pack it with dielectric grease. An even better option is to remove the connector entirely, and solder each set of wires together.

While you're checking connections, also make sure the main ground to the frame on the left motor mount triangle is good with no corrosion or paint underneath it.

Once your battery is charged, put it back in and check your voltage between the battery posts at idle and around 1200 or greater RPM, as mentioned earlier. You want to see at least 13.5 volts, or higher, at RPM.

If you don't have those numbers, there are a few other things we can check before throwing money at parts. Stators do sometimes fail on these bikes, but more often than not it's a series of poor connections that cause charging issues.

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AZgl1800
Posts: 1379
Joined: Thu Oct 30, 2008 2:46 pm
Location: Lake Oologah Indian Territory USA
Motorcycle: '02 GL1800

Re: Losing battery power

Post by AZgl1800 » Tue Jul 24, 2018 7:09 pm

On my bikes and my lawn tractor, I have permanent pig tails wired direct to the battery.
the minute I park the bike, or put the lawn tractor away, the Battery Tender is plugged in.

That keeps them ready to go, no matter how long you have not used it.

I also have a 1.25 amp Battery Tender Jr. on my RV's Deep Cycle 1,000 amp hour battery.
it keeps that battery at 13.88 volts all the time, I check it every few days just to be sure.
the light is green on the charger.
~John

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DWade1990
Posts: 90
Joined: Thu Apr 27, 2017 7:27 pm
Location: Akron, OH
Motorcycle: 1976 GL1000
1983 GL1100 Aspencade
1981 CB750K
2006 FJR1300

Re: Losing battery power

Post by DWade1990 » Tue Jul 24, 2018 7:18 pm

Any chance you could get us a voltage measurement with the key off? Just want to be sure we don't go chasing charging issues if the starter is shot and won't turn over when the motor is hot.



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