GL 1500 parasitic draw


Information and questions on GL1500 Goldwings (1988-2000)
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Nice95Wing
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Joined: Tue Apr 16, 2024 5:51 am
Location: DuBois PA
Motorcycle: 1995 Honda Goldwing SE

GL 1500 parasitic draw

Post by Nice95Wing »



Hey guys could anyone tell me what the parasitic draw is supposed to be on the GL 1500? My bike is pulling 6.21 milliamp and after a month or so the battery will be down very low like 2 volt. The battery is only a few months old and charges up perfectly and at rest after charging is like 12.44 volts.

I thought maybe I'd give a battery tender junior a try. I don't like that as a solution but I thought ,well lots of people do it. The battery tender would never turn off charge mode (red)into storage mode (green)and just was constantly slowly boiling the battery. After 3 days I said enough of that and pulled it off.

The battery water level is within the correct range and when it was boiling it seemed as though all cells were boiling. Any thoughts? Thanks Jason


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Happytrails
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Re: GL 1500 parasitic draw

Post by Happytrails »

Not sure what the draw is but sounds like you maybe have much more. Never used to use a battery tender until I got my goldwing and I have it on pretty much anytime its parked. Also have a Ural it it actually draws more so have to leave it on a tender also probably for similar reasons my goldwing draws power when parked. Not sure why your bike is drawing more except for maybe some accessory wiring that might be causing it. Good luck tracking it down :)
1991 GL1500 SE Anniversary Edition
Sun Flare Gold Metallic
Vallant Brown Inset
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John K
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Re: GL 1500 parasitic draw

Post by John K »

The draw is anything drawing power when the ignition is off
The clock runs 24/7
ECM may be another item. Memory for radio channels. Etc

Battery Tender will charge your battery only when it is necessary. When the green light is on it is sitting there waiting.

I don’t drive or ride the vehicles in my garage enough to keep them charged so each has a tender on it.
I joke when I buy a battery for the bikes as they last only 9 years or so. The battery in my truck only lasted 16 years. I plug in EVERY time they are parked in my garage.

I do NOT recommend battery chargers as they are on and charging full time. I recommend a battery tender system

Take Care
John K
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MikeB
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Re: GL 1500 parasitic draw

Post by MikeB »

The parasitic draw should be .005 amps (5 milliamps).

I do not know how you are checking your parasitic draw or if you're reading of 6.21 milliamps actually means 6 amps and 21 milliamps or actually is .00621 amps which is 6.21 milliamps.

If the parasitic draw is .00621 amps, then the draw is not bad at all.

If your battery boils when it is charging, then there is too much current going into the battery during charge. A Battery Tender Jr should never produce enough current to boil a battery.

A normal Battery Tender Jr is perfect to keep your battery topped up when the bike is not in use.
MikeB
1998 - GL1500 w/195,500 miles ~ 2017 - GL1800 w/32,000 miles
USAF Avionics Communications Tech - 1968 - 1986 / Flight Engineer C-130E - C-141B - 1986 - 1992. Retired
Industrial Maintenance Tech - 1992 - 2014
Retired in Tacoma, WA
Nice95Wing
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Re: GL 1500 parasitic draw

Post by Nice95Wing »

Yup, I'm checking with my multimeter. Disconnecting the positive terminal and checking amp draw between the positive terminal on the battery and the main (only) wire that hooks to it with the meter.

I'm getting 6.21 milliamp on milliamp setting or .00621 amp on the amp setting
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MikeB
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Re: GL 1500 parasitic draw

Post by MikeB »

That looks to be normal draw. That would not be enough to draw the battery down to nothing in 30 days.

It is an 18 to 20 amp battery. It would take about ten times that much to draw the battery down so quickly.
MikeB
1998 - GL1500 w/195,500 miles ~ 2017 - GL1800 w/32,000 miles
USAF Avionics Communications Tech - 1968 - 1986 / Flight Engineer C-130E - C-141B - 1986 - 1992. Retired
Industrial Maintenance Tech - 1992 - 2014
Retired in Tacoma, WA
Nice95Wing
Posts: 20
Joined: Tue Apr 16, 2024 5:51 am
Location: DuBois PA
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Re: GL 1500 parasitic draw

Post by Nice95Wing »

I was thinking it would possibly be normal or slightly above normal draw. Here is my battery. I did not put it in ,the previous owner did but he gave me all the receipts and the receipts show it being purchased on April 18th 2024.

Here is another odd part of the story. The previous owner told me that it was actually the second one that he had recently put in because he believed that his battery tender went bad and had boiled the first one dry. He threw away the tender.
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MikeB
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2017 - GL1800 Audio Comfort
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Re: GL 1500 parasitic draw

Post by MikeB »

Age of a battery is not a good interpretation of its ability to deliver current or hold a charge. It needs to be load tested to do that.

If you have a float charger, Battery Tender Jr or standard, make sure it is connected correctly to the battery.

Then you can connect the float charger and check the charging current with your multimeter if you suspect the charger as being defective in some way. It should charge at or about .8 amps or less
MikeB
1998 - GL1500 w/195,500 miles ~ 2017 - GL1800 w/32,000 miles
USAF Avionics Communications Tech - 1968 - 1986 / Flight Engineer C-130E - C-141B - 1986 - 1992. Retired
Industrial Maintenance Tech - 1992 - 2014
Retired in Tacoma, WA
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Charlie1Horse
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1992 GL1500I Interstate

Re: GL 1500 parasitic draw

Post by Charlie1Horse »

Have the battery load tested. It doesn't matter that it was purchased in April. Many years ago my dad taught me that
'Just Because It Is New Doesn't Mean It's Good'. I have seen brand new batteries that are defective and seem good at first. TEST IT!!
If any new accessories have been added, disconnect them and recheck for draw. Quite often, the source of the draw is a defective new accessory.
Russell
Those who say it cannot be done should try not to interrupt those who are doing it.
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Rambozo
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Re: GL 1500 parasitic draw

Post by Rambozo »

Sounds like your battery is toast. You can do a capacity test to confirm but the numbers you provided tell the tale.
My 1500 measures about the same as yours 5 - 6 mA parasitic drain. With the stock 21Ah battery it should take around 87 days to drop the battery to a 50% state of charge and 140 days to the minimum 20% state of charge.
I can confirm these numbers as my bike sat untouched for 3 months while I was in the hospital and I was somewhat surprised to find that it fired right up when I hit the button. Lots of people use battery tenders, but my bike is a daily driver for me, so I never have.
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Snowmoer
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Re: GL 1500 parasitic draw

Post by Snowmoer »

Not a fan of the Battery Tender JR. I had one go bad and cook the battery. I only use the Battery Tender Plus, the bigger one. I have one that is 20 years old and still works great. It is hooked up to my RV battery right now. I also have them on my wing and quads.

Agree that your battery is bad. If the tender will not to go green, then the tender is not sensing a full charge to be able to go to green. I have had this happen on batteries before. A short time later, the bike would not start. Put in a new battery, problem solved.

Also, if you do replace the battery, get an AGM one. No need to check fluid level ever again!


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