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Post by motorhead on Sept 3, 2011 14:44:26 GMT -5
My 150cc scooter keeps killing my battery. I tested the battery it's good and I recharge it but the battery dies eventually when run in my scooter. I checked my stator and all the readings coming out going to the rectifier are on spec. The white wire from the stator going to the rectifier read 17-18v AC. But the red wire coming from the rectifier going to the battery reads 6v DC. Is the regulator supposed to put out 6 volts because I have tried another regulator and I get the same reading also.
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Post by Fox on Sept 3, 2011 15:48:10 GMT -5
What's the voltage at the battery terminals with the engine revving?
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Post by jmkjr72 on Sept 3, 2011 16:40:35 GMT -5
with your multi meter hooked to the battery while reving you should see 13.5 volts at the battery if not its not chargine
if you are getting the proper voltage off your stator then it would be the rectifier that is bad
but you can not test without a working fully charged battery hooked up
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Post by motorhead on Sept 3, 2011 20:07:29 GMT -5
My battery terminals read 12.9v static and the same while reving. Throttle input does not increase the voltage. Both the rectifiers I try give me 6 volts going to the battery. I guess the both must be bad.
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Post by jmkjr72 on Sept 3, 2011 21:36:05 GMT -5
yeah you should notice some sort of increase if you are not geting more then 12 volts sent to the battery it wont charge
could it be that you have some sort of drain before you get to the battery
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Post by motorhead on Sept 3, 2011 21:56:11 GMT -5
there is no drain before the battery because the rectifier output to the battery is 6volts at idle and 7 volts wide open. and i get the same 6v-7v readings at the terminals with the battery disconnected.
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Post by stepthrutuner on Sept 4, 2011 10:02:18 GMT -5
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Post by motorhead on Sept 5, 2011 11:04:28 GMT -5
I took a rectifier from a 250cc and it too read 6 volts out to the battery.
And here is an observation about the stator. If I read the stator voltage from the white wire while disconnected from the rectifier it reads 26v ac. But while connected to the rectifier the white wire reads 15 v ac at the connection to the rectifier.
I think the stator is suspect as well, I think it makes the voltage but not the amps. Only if there was a way to load test the stator.
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Post by motorhead on Sept 5, 2011 11:16:29 GMT -5
CONFIRMATION: STATOR IS BAD
Here is why? I unplugged the connection from the stator to the rectifier and I connected the yellow stator wire that powers the lights into the white wire's spot. Then it read 9v dc out to the battery. You guys were right, the stator is bad. It gave the correct voltage but it doesn't have the amps behind it to go through the conversion at the rectifier to make 12v dc. Thanks for that link stepthru and as always.
49ccscoot members are the bomb
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Post by motorhead on Sept 7, 2011 13:56:56 GMT -5
I put a new stator in the bike and I still get the same problem. 6v dc going to the battery. Since 2 stators and 3 rectifiers give the same readings, what else am I missing?
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Post by lshigham on Sept 7, 2011 15:18:04 GMT -5
The wiring in between?
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Post by motorhead on Sept 7, 2011 15:37:34 GMT -5
There isn't much between the stator and rectifier.
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Post by lshigham on Sept 7, 2011 15:40:48 GMT -5
There isn't much between the stator and rectifier. TBH, I can't think of much else, unless you've got a duff RR, not uncommon. |
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Post by stepthrutuner on Sept 7, 2011 18:14:04 GMT -5
Make sure each connection at push-together connections is good and firm. Make sure grounding points are clean and bright.
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Post by motorhead on Sept 9, 2011 18:37:50 GMT -5
So here's the skinny.
Apparently wires in the dash where shorting out and taking away from the charging system. Apparently The wiring diagrams are not as straight forward as I thought. There were hot (temperetue wise) wires sending power to nothing and taking away from the charging system.
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