BIke won't start. Acts like a dead battery but it isn't! - Harley Davidson Forums: Harley Davidson Motorcycle Forum
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Old 01-15-2012, 04:04 PM   #1 (permalink)
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BIke won't start. Acts like a dead battery but it isn't!

Hello. I own a 2007 sportster 1200. I ride this bike often, several times a week. Recently I went on vacation and the motorcycle sat for 10 days. At the same time the weather cooled down significantly while we were away. When I came back I put in the key the lights and odometer came on but the motorcycle didn't have enough juice to start. It tried to turn over and ultimately just died. The lights went off, the odometer turned off, no power. I tried to jump start the battery with a portable battery pack but had zero success. When I attached the terminals the lights/odometer/fuel pump would turn on, but it still wouldn't turn over. It tried, almost sounded successful, but in the end - nothing. I went out and bought a battery tender/ trickle charger. I plugged the bike in for a few hours and the bike started right up. I let it run for 20 minutes then hopped on and cruised around. I went to Costco to have them put air in the tires. Turned the bike off and it started right back up for me to get home. I let the bike run for about an hour altogether, then parked it. We had rain for the next 3 days and it stayed parked. The 4th day I jumped on to go to work put in the key and nothing. No lights/odometer/fuel pump - nothing. I plugged the battery back into the tender overnight to get a charge. The next day I jumped on and...nothing. No lights/odometer/fuel pump. I tried to jump the bike again with the portable battery pack, and again when I connected the terminals lights come on, odometer and fuel pump come on. The bike tries to turn over but with no success. So I figured my battery was just way too low. So I got my riding mower out(also 12 volt) and tried to jump it with cables but had the same experience that I did with the portable jumper pack. I went out and bought a better battery tender and tried that, but this time I plugged it in and the charger said the battery was fully charged. So I put the key in and not a thing. No lights/odometer. So I removed the battery to get it tested. The battery is testing great. In fact pep boys was amazed that such a small battery produced so many cold cranking amps. I don't really no where to go from here. I have a fully charged battery that when installed can't even turn on the lights, much less start the bike, but when I put jumper cables on this great battery things start to work but still not enough for the bike to start. Where should I go from here? I have a hard time believing that my bikes electrical system failed over a week and a half, when it had been a daily rider. Where should I go from here. I could trailer it over to HD, but they charge so much. Any help would be greatly appreciated.
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Old 01-15-2012, 04:35 PM   #2 (permalink)
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Like DANG man , separate your sentences every now and then ... that's a tough read right there . I'd like to help ya out but make your post readable please !
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Old 01-15-2012, 05:13 PM   #3 (permalink)
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Find the ground connection from the battery to the engine block, remove the bolt, and clean it really good. Might be a bad ground. I've used a little sand paper on mine.
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Old 01-15-2012, 05:53 PM   #4 (permalink)
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You've got a loose or dirty battery connection..... Even if battery bolts are tight, check cable for movement at battery terminal.
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Old 01-15-2012, 05:54 PM   #5 (permalink)
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battery tender won't charge a dead battery.After checking the ground, get it started and check the voltage at the battery 13-14.5 volts @ 1200rpm. If not could be voltage reg. or stator.
listen to Dave63. smart dude
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Old 01-15-2012, 06:25 PM   #6 (permalink)
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Evidently an apology is in order for my grammar (or lack there of). Cut me some slack. I was using my phone to convey a lot of info. I was at my frustration peak sitting on my garage floor. So, like dang man, I apologize for my error(s). Thank you all very much for the help. I will put your insight to use tomorrow.
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Old 01-15-2012, 06:27 PM   #7 (permalink)
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Quote:
Originally Posted by Gcente View Post
Evidently an apology is in order for my grammar (or lack there of). Cut me some slack. I was using my phone to convey a lot of info. I was at my frustration peak sitting on my garage floor. So, like dang man, I apologize for my error(s). Thank you all very much for the help. I will put your insight to use tomorrow.

If you typed all that on a phone, then you're a better man then I.....
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Old 01-16-2012, 05:47 AM   #8 (permalink)
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Quote:
Originally Posted by Gcente View Post
Evidently an apology is in order for my grammar (or lack there of). Cut me some slack. I was using my phone to convey a lot of info. I was at my frustration peak sitting on my garage floor. So, like dang man, I apologize for my error(s). Thank you all very much for the help. I will put your insight to use tomorrow.
Sorry man I didn't mean to give you heat . And like Dave said , you typed all that on your phone ... !!!!
On '04 and up Sportsters there's a specific procedure for removing and reinstalling the battery and if not followed will result in the battery negative cable loosening up at the terminal every time .
1) Remove the battery hold down strap .
2) Remove positive cable from terminal .
3) Disconnect negative cable from the top of trans .
4) Slide battery out pulling the negative cable with it .
5) Tighten negative cable to battery terminal with cable pointing down.
6) Start battery into place feeding negative cable back in and down to trans .
7) Reconnect positive cable to terminal and install hold down strap .
8) Reconnect negative cable to top of trans .
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Old 01-16-2012, 05:57 AM   #9 (permalink)
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Another thing ,'06> injected Sportsters had a problem with water accumulation in the fuse block that would short the relay connections resulting in the throttle body IAC staying active after the ignition is turned off . That would result in the battery wearing down while the bike just sits there .
Water runs down the main harness and gets into the back of the fuse block affecting the fuses and relays . The fix is to remove the fuses and relays , blow dry the fuse block , coat the relay and fuse terminals with diaelectric grease and replace them .
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