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Brad Fitzpatrick

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Motorcycle Update: still no go [Sep. 8th, 2007|12:12 pm]
Brad Fitzpatrick
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Update on the motorcycle situation:
  • I bought the recommended, smart trickle charger.
  • It flashes red when connected to aux port (manual: "Battery not connected, or battery totally dead (under 3V)")
  • Also tried connecting it to battery leads... same thing.
  • Tested battery leads with volt meter: 0 volts. Needle didn't even twitch. Tested on car, to test volt meter: 12 volts. Volt meter fine.
Now what? Stupid "smart" trickle charger won't recharge the battery because it's too dead? Confused.

I'd remove the battery, but I'd need to remove the right side panel, and I don't have Torx tools.


Buy new battery? Motorcycle only about 1,200 miles.. alternator should be fine, says the shop.

[User Picture]From: edm
2007-09-08 08:26 pm (UTC)

Motorcycle battery

Given those symptoms (and your earlier ones), I'd actually guess that somehow the wiring to the battery (or between the battery and the engine) has come loose. I'd not expect a motorcycle battery to suddenly read completely dead (even leaving the lights on is more likely to leave the battery reading a low voltage, rather than zero volts). But zero volts is entirely consistent with "disconnected".

So I'd suggest you obtain the necessary Torx tools, pull the battery, and test it individually (and perhaps charge it separately -- as others have said a trickle charger works best if the battery is already partly charged, but in general if it's been completely discharged it may well need replacing anyway). Worst case you discover the battery is completely dead and you get a replacement, for which you'd have to have removed that cover anyway.

I tend to agree with your shop that the alternator is unlikely to have died in such a new bike, and generally they get less efficient (and thus charge less efficiently and start less efficiently -- it's also the starter motor) rather than just stopping working.

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[User Picture]From: zarex
2007-09-08 10:21 pm (UTC)

Re: Motorcycle battery

I agree. Not only is it unlikely that the alternator is bad, but it's equally unlikely that the battery is bad, after such a short life. I don't know why the shop didn't say so.
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