Excessive battery drain - Harley Davidson Forums: Harley Davidson Motorcycle Forum
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post #1 of 18 (permalink) Old 11-10-2008, 11:00 AM Thread Starter
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Unhappy Excessive battery drain

Help..... Bike is currently at Dealers for the 4th time with same problem.

After riding it home from a service the day before, putting her away in the garage, turning the ignition off and leaving her for the night, I returned to ride her the next day. The engine was cold, with the ignition in the 'off' position, as I'd left her. However, the alarm key light was on all the time (not flashing) and a noisy strange clicking sound was coming from the engine behind the air cooler. I went to start her and there wasn't enough juice to fire her up. I turned the ignition back off, removed the key and the alarm set properly with key light flashing. Charged the battery up before taking it back to the dealers.

This has happened 3 times before - the first time, the battery was replaced even though this wasn't faulty. Last time the rectifier was changed but I rode it home, only to find that the alarm didn't activate properly with the key light staying on and the strange clicking sound. I rode it back to the dealers the next day and thay said nothing was wrong!

Something is draining the battery and I can only think it's something to do with the ignition or the alarm. The dealer has no idea....does anyone on here?

Someone suggested it could be the fuel pump rleay and corroded fuses but the Dealer seems to have poo pooed that one.
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post #2 of 18 (permalink) Old 11-12-2008, 07:56 PM
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It definatly a relay clicking cause of low voltage charge your battery
then disconnect the negative lead from the battery put a test light from the negative battery cable to the negative battery post if it lights up you got a drain somewhere if you do leave the test light where it is and start pulling your fuses one at a time when you pull a fuse and the test light goes out that is the circut that has the drain..I hate alarms somtimes they are more trouble than what there worth...
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post #3 of 18 (permalink) Old 11-14-2008, 03:58 PM
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Which model and year ?
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post #4 of 18 (permalink) Old 11-16-2008, 05:38 PM
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Have you added anything that connects to the electrical system and did this problem start after you added them?

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post #5 of 18 (permalink) Old 04-15-2009, 06:30 PM
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Same type of problem

Here's the issue: 2005 Ultra Classic - no security system - all stock

On the 4th battery from dealer, they changed only the stater then rebuilt my radio, 3rd & 4th nothing wrong, put in a new battery.

Bike is under extended Warranty and they are saying SORRY we can't fix it! Then they said to get a trickle charger, but I can't don't have access to plug it in!

It discharges randomly, sometimes its 2 times in a week, sometimes 3 weeks it will stay charged.

Can anyone give me any ideas to give the "specialists" at HD on how to fix this problem? Thanks!

It's been a year of taking in it and not one of them has any ideas... and now I am getting sick and tired of this.
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post #6 of 18 (permalink) Old 04-15-2009, 06:34 PM
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sounds like a stuck relay...also I have a battery tender that I plug my scoot into everytime I park it at home...keeps my battery at a full charge all the time so it lasts longer...but fix the relay thing...the random thing sounds like the relay sticks when it wants to...by the way , how old is the bike. ???

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post #7 of 18 (permalink) Old 04-15-2009, 06:44 PM
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2005 year

It's a 2005
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post #8 of 18 (permalink) Old 04-15-2009, 06:49 PM
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you could have an intermitant short(something like a pinched wire shorting out only when conditions are right). Lots of wiring on an Ultra....I'll talk to my buddy in the HD repair biz..he rides an 03 Ultra...maybe he knows something about it....have you added any extras on that draw juice ? my memory wire on my stereo that I put on will drain my battery over about a week without the battery tender hooked up....

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post #9 of 18 (permalink) Old 04-15-2009, 07:08 PM
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My buddy says put a full charge on your battery and check with volt meter..make a little chart to keep a log of your tests.....pull your left side cover off and pull one fuse only, writing on the chart what fuse you pulled....leave the fuse out over night and check the voltage at the battery. log your results....then reinstall that fuse and move to the next one and pull it logging down which one it is....wait overnight again and check battery voltage again...Keep doing this pattern till you get all the way through the fuses....you should find the source of your electrical discharge by doing this .....then after you find the culprit go talk to the HD boys and enlighten them as to where they need to look....It'll take a few days to do this but it very well might send you in the right direction...let me know how it goes...

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post #10 of 18 (permalink) Old 04-15-2009, 07:36 PM
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thanks

Thanks for the tip, will let you know what happens. I think HD should be the ones doing this since it's under their warranty?

Quote:
Originally Posted by Blackdog 15 View Post
My buddy says put a full charge on your battery and check with volt meter..make a little chart to keep a log of your tests.....pull your left side cover off and pull one fuse only, writing on the chart what fuse you pulled....leave the fuse out over night and check the voltage at the battery. log your results....then reinstall that fuse and move to the next one and pull it logging down which one it is....wait overnight again and check battery voltage again...Keep doing this pattern till you get all the way through the fuses....you should find the source of your electrical discharge by doing this .....then after you find the culprit go talk to the HD boys and enlighten them as to where they need to look....It'll take a few days to do this but it very well might send you in the right direction...let me know how it goes...
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