07 bandit 1250 2 batteries in 3 weeks

Discussion in 'The Garage' started by andrewsclues, May 11, 2013.

  1. andrewsclues

    andrewsclues Been here awhile

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    Help, please, I need a little knowledge here.... i just went to start my bike, and i turned the key and i got no power. battery is 3 weeks old and is reading only. 1.4 volts dc. i know its not 14, but 1.4. its now charging.

    Same thing happened with a two year old gel battery 3 weeks ago. I assumed the battery was dead so I bought the agm battery that is currently charging.

    The bike ran fine on Monday. Now 5 days later its down to practically nothing.

    What can cause a battery to run down so low just sitting in a garage for 5 days?
    #1
  2. andrewsclues

    andrewsclues Been here awhile

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    Would anything cause the reading of 1.5 volts other than a defective battery?
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  3. Twilight Error

    Twilight Error Going nowhere slowly

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    Double check your meter, its probably not wrong, but low hanging fruit and all that. Disconnect the battery and charge that independent of the bike. When it's reading 12v, load test to be sure its good. If the battery is sat, reconnect the battery positive and put an ammeter between the negative and the battery. If it shows current, start disconnecting systems or pull fuses one at a time until you find the drain.
    #3
  4. andrewsclues

    andrewsclues Been here awhile

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    Thanks the meter is good i tested my car battery and its at 12.8v. the battery is charging now and at just over 9 volts. I tested the negative wire that has been disconnected and the positive terminal that is connected and its reading 0.00mv, so it looks like there is no draw. I'll wait until the battery is fully charged and test it again like you said and also test the charging system with the bike running.

    thanks
    #4
  5. Twilight Error

    Twilight Error Going nowhere slowly

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    What meter are you using? Current is measured in Amps, not volts. Most handheld multimeters have separate inputs for V+ and A+, in addition to being on the correct scale, you've got to have the leads plugged in to the right jacks and be connected to the system in series (one lead to the - wire, the other lead to the - terminal at the battery. Another thing to check is the fuse in your meter - the shunt that is used for measuring current is protected by a fuse.

    Your reading of 0mv has me wondering if you've got the system connected wrong. The ECU will draw a couple mA o maintain itself, you should see at least that on the meter.
    #5
  6. andrewsclues

    andrewsclues Been here awhile

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    Lemme go check that... i did not have it set up for amps...
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  7. andrewsclues

    andrewsclues Been here awhile

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    OK... i just tested the bike for current like you said... I got 0.0A. Then I tested a household 9v battery, still got 0.0A. Should have gotten around 5.5A, right?

    The multimeter fuse looks good.

    Here's a pic if the dial setting... And where the plugs are...
    [​IMG][​IMG]

    What am I doing wrong??
    #7
  8. Twilight Error

    Twilight Error Going nowhere slowly

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    You've got continuity through the fuse? Yes, you should have seen ~5.5A, connected to just a 9v battery. Everything in the photos looks like you've got it set right, I'm not sure what's up with the meter if everything checks out.
    #8
  9. andrewsclues

    andrewsclues Been here awhile

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    Yes the fuse looks ok... but obviously something with the meter is not working right.... ugh.

    Thanks for the help. I'll let the battery charge overnight and try to get a different multimeter tomorrow.
    #9
  10. Motomedic

    Motomedic Long timer

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    With the meter leads plugged into the volts/ohm holes, simply put the positive lead into the ammeter hole. Should have continuity. No continuity (open, or o/l) means the fuse is toast. Trying to measure voltage with the meter leads in the ammeter positions will fry the fuse.

    As for the battery, two batteries going dead means either there IS a draw or the charging system is toast. Measure the battery voltage with the bike off, then start it. Voltage should be at least .5 volts OVER static voltage, preferably north of 14vdc, and less than 14.5. Anymore than 15 and you're overcharging, which is as detrimental to battery health as undercharging.
    #10
  11. Twilight Error

    Twilight Error Going nowhere slowly

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    Pull the fuse and check it with the meter - the current and resistance circuits are typically separate.
    #11
  12. andrewsclues

    andrewsclues Been here awhile

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    the fuse tests at 18.8 ohms.

    it connects to a circuit board... maybe there's a bad solder joint in there somewhere.
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  13. Twilight Error

    Twilight Error Going nowhere slowly

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    It's soldered to e circuit board? Weird.

    Okay, finish charging the battery and check the charging system as motomedic suggested. I look for shorts first because they're easy to rule out or verify, but a questionable meter makes that task much tougher.
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  14. andrewsclues

    andrewsclues Been here awhile

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    Thanks for the info Moto and Medic... when I do get a AmpMeter that works, what is the max drain or draw allowable?
    #14
  15. andrewsclues

    andrewsclues Been here awhile

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    the cradle the fuse sits in is soldered to the circuit board.
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  16. Twilight Error

    Twilight Error Going nowhere slowly

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    I prefer Fluke multimeters, I use a 289 at work and have a 73 in my toolbox. There are plenty of decent options for the home mechanic, but Fluke is generally considered the standard.

    An acceptable draw depends on the size of the battery. The ECU sips from the battery, that load takes much longer to drain the battery than your 5 day timeline, which suggests you're seeing an amp or so leaking somewhere. It could be as simple as a relay coil that's remaining energized.
    #16
  17. Motomedic

    Motomedic Long timer

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    If you're seeing more than a .2 amp draw, find the culprit. An easy way to start eliminating circuits is with the ammeter (no P in ammeter :D) connected, as per TE, start pulling fuses. When the draw goes away, you've found your suspect circuit. Using a wiring diagram (you DO have a manual, right?) the draw will be easier to find from there.
    #17
  18. andrewsclues

    andrewsclues Been here awhile

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    will do.... i do have a manual. thanks!
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  19. Yamarocket630

    Yamarocket630 Honey Badger

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    That should be more like 0.010A or less. 0.2A will drain a moto battery in a matter of days.
    #19
  20. Motomedic

    Motomedic Long timer

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    ECM memory, clock, etc. .01 amps? yeah right. Maybe on a older points equipped bike w mechanical gauges. Checking the manual is the best way to determine how much it should be pulling w ign off.
    #20