alternator


Information and questions on GL1500 Goldwings (1988-2000)
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ftmoore992003
Posts: 10
Joined: Fri May 21, 2010 6:40 pm
Location: Houston Ms
Motorcycle: 1998 GL 1500 SE
1984 V65 magna

alternator

Postby ftmoore992003 » Sun Oct 27, 2013 2:02 pm



How do you test the alternator on a 98 1500 SE to see if its charging ?



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Sempai
Posts: 295
Joined: Wed Mar 10, 2010 12:30 am
Location: Wichita, KS
Motorcycle: '94 GL1500SE
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Re: alternator

Postby Sempai » Sun Oct 27, 2013 3:00 pm

Remove both side covers.
Charge your battery to it's fullest capacity.
Check battery voltage.
Start bike, and check battery voltage, should be HIGHER, not lower than what you saw in the previous step.
Set your multimeter to 20V setting.
Check alternator voltage output by grounding your multimeter to any KNOWN ground and probing the BAT terminal on the back of the alternator (while the engine is running.)
Check alternator output amperage by probing the battery wire at the BAT terminal end and the battery + post.
Keep the rubber side down.

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ftmoore992003
Posts: 10
Joined: Fri May 21, 2010 6:40 pm
Location: Houston Ms
Motorcycle: 1998 GL 1500 SE
1984 V65 magna

Re: alternator

Postby ftmoore992003 » Sun Oct 27, 2013 4:12 pm

While waiting on the Goldwing to warm up, the Battery Bug volt meter shows 11.7 volts.....after the bike warms up, the engine idle is pulled down like it does on a car when you hook up jumper cables. When the bike engine idle is pulled down, the meter shows its charging at 12.7 then 13.8 then 14.3 and then charges the rest of the day. Next morning.......same story. What is going on here?

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artgrantz
Posts: 276
Joined: Sat Apr 10, 2010 9:25 pm
Location: Manchester, PA
Motorcycle: Current: 2008 GL1800
Previous: 96 GL1500 SE
85 GL1200 I
85 GL1200 I
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Re: alternator

Postby artgrantz » Mon Oct 28, 2013 5:07 am

ftmoore992003 wrote:While waiting on the Goldwing to warm up, the Battery Bug volt meter shows 11.7 volts.....after the bike warms up, the engine idle is pulled down like it does on a car when you hook up jumper cables. When the bike engine idle is pulled down, the meter shows its charging at 12.7 then 13.8 then 14.3 and then charges the rest of the day. Next morning.......same story. What is going on here?

It is normal for the voltage to vary with the load. It takes a few minutes to replace the charge that was used to start the bike, after that it should be maintained at about 14 volts.
When sitting at a stop light with the brakes on the voltage will drop a little because brake lights use a lot of current. When you release the brakes the voltage will rise.

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dingdong
Posts: 2863
Joined: Thu Apr 08, 2010 8:35 am
Location: Oklahoma City
Motorcycle: 1976 gl1000
1993 gl1500
2004 NRX1800 Rune

Re: alternator

Postby dingdong » Mon Oct 28, 2013 7:04 am

All systems normal. Go for a ride.
Tom

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silverado6x6
Posts: 185
Joined: Fri Oct 11, 2013 6:29 am
Location: Wasilla, Alaska and Adelaide,South Australia
Motorcycle: 1995 GL1500 Aspencade
And 17 other bikes, 5 more Goldwings, 3 Ventures, 2 Vmax

Re: alternator

Postby silverado6x6 » Mon Oct 28, 2013 8:08 am

I installed a micro digital volt meter in the dash of my gl1500.


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