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Post by firstscoot on Jul 24, 2008 9:43:59 GMT -5
I been having battery charging problem since I got my scoot. I was getting readings of about 13.2 volts while revving the engine. Too low to charge the battery. Yesterday I finally decided to do a second PDI to figure out the problem. I got lucky. I found the problem within minutes. The charging system was not grounded properly. When I unscrewed the ground to check it, I found the ground wires were grounded to a nice coat of black paint.  Paint in not a good conductor. I took some sand paper and sanded down to nice shiny metal. I then hooked up the three ground wires. Now for the test. Unlike in the past, my volts jumped immediately to 13.8 volts by just starting the engine. I then revved the engine. 14.5 volts!! ;D I know there is a lot to things that can cause you battery not to charged. Hopefully some of you will get lucky, like I did, and just have a bad ground. Check out to pics to see where my trouble was. i285.photobucket.com/albums/ll63/firstscoot/100_0466.jpgi285.photobucket.com/albums/ll63/firstscoot/100_0447.jpgi285.photobucket.com/albums/ll63/firstscoot/100_0462.jpgi285.photobucket.com/albums/ll63/firstscoot/100_0464.jpgNow for the fun part. Putting the scoot back togather!  |
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Post by madmanjustice on Jul 24, 2008 10:26:50 GMT -5
yep, i had the exact same thing on my MC54 about two weeks after i picked it up. I wrote about it in the 250 forum.
When people tell me that they are having chargng problems the first thing I tell them is "check your grounds"
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Post by laduke250 on Jul 24, 2008 11:17:04 GMT -5
awesome tip! a picture is worth a thousand trial & errors!
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Post by mch4fishing on Jul 24, 2008 18:58:25 GMT -5
I was trying to open the pics but I am getting URL not found
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Post by mch4fishing on Jul 24, 2008 19:14:39 GMT -5
nevermind I fixed the PIC thing now I am going to check my ground
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Post by firstscoot on Jul 25, 2008 9:51:20 GMT -5
I put the scoot back together yesterday. I went for a spin last night. It's nice to have bright head lights that don't dim when I accelerate.
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Post by mrpulldown on Jul 25, 2008 10:05:02 GMT -5
Nice job. Don't think that you needed to take everything apart. That must have beena PITA to get all those panels off. But must have made things easier to daiginos.
Good job.
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Post by fufu2wheel on Jul 25, 2008 10:24:38 GMT -5
Actually, taking off the body panels on MC-54-250 scooters is not all that complicated, I can take off all the body panels within 30 minutes:  |
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Post by firstscoot on Jul 25, 2008 14:17:51 GMT -5
Nice job. Don't think that you needed to take everything apart. That must have beena PITA to get all those panels off. But must have made things easier to daiginos. Good job. I wanted to do a second or more complete PDI as I was trouble shooting the charging problem. That's why I took everything off. I found a few bolts that needed to be snugged, shortened a couple of vacuum lines, and found one bolt that was really loose. |
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Post by firstscoot on Jul 25, 2008 14:19:14 GMT -5
Actually, taking off the body panels on MC-54-250 scooters is not all that complicated, I can take off all the body panels within 30 minutes: Right! It's pertty easy to disassemble. |
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Post by mch4fishing on Jul 26, 2008 8:24:50 GMT -5
HELP... I was having charging problems on my 2007 Viva MP250RO YY250T dim lights at rev dead battery after work ext ext ext replaced Battery drove it 35 miles everything was looking good drove to work came out at lunch dead battery. read this article stripped down body found paint on ground tab..ground off paint hooked 3 ground wires back up... now I have a small 1" aluminum block with fins bolted by a single bolt to frame with a red wire and a yellow wire and a -T- shaped connector that just started smoking and blowes the in line fuse from battery resulting in no elect to dash..checked at -T- connector found same volts as battery with key on or off (note red wire to yellow wire in plug same volts as battery ) I have this plug disconnected at this time for fear of 1 frying a wire & 2 running out of 15amp in-line fuses  |
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Post by "Big Guy" on Jul 26, 2008 8:54:30 GMT -5
You have power going to ground somewhere. The most common place is the gang connector for the license plate light. The male connector from the wiring harness has a tendency for the two wires going into it to touch each other and cause power to ground, check this first since it's so problematic. Otherwise, somewhere in your wiring, you might have a hot wire that has rubbed on a piece of metal and is shorting on the frame somewhere, or perhaps another bad gang connector somewhere.
-Rich
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Post by mch4fishing on Jul 26, 2008 10:03:47 GMT -5
try ed plate light connection not that but thanks for showing me my next potential melt down Will black tape the super cheap clear covers on the bullet connectors. ? what is the diode that I was looking at that started smoking and what dose it do?...could it be my short The only time the fuse blows is when it is plugged in |
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Post by glassvial on Jul 30, 2008 11:19:20 GMT -5
Looks like not all ground connections are created equal:  Just curious, has anyone else tried upgrading their battery/ground cables? 4AWG 24" neg battery cable, 6AWG 6" ground to block cable, MC-54B Linhai setup. |
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Post by firstscoot on Jul 30, 2008 11:49:53 GMT -5
Looks like not all ground connections are created equal: Just curious, has anyone else tried upgrading their battery/ground cables? 4AWG 24" neg battery cable, 6AWG 6" ground to block cable, MC-54B Linhai setup. Why do you want to upgrade? |
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Post by glassvial on Jul 30, 2008 17:05:20 GMT -5
Why do you want to upgrade? Why do you want problems? |
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Post by firstscoot on Jul 31, 2008 11:03:36 GMT -5
Why do you want to upgrade? Why do you want problems? I not the smartest guy in the world but I'm also not the dumbest. I don't get your response. Are you saying that you will have problems if you don't upgrade your gound to 4AWG? |
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Post by glassvial on Jul 31, 2008 11:22:03 GMT -5
I not the smartest guy in the world but I'm also not the dumbest. I don't get your response. Are you saying that you will have problems if you don't upgrade your gound to 4AWG? I'm saying you may have less problems. It's fairly obvious the "quality" of the Chinese battery cables is, uh, suspect? |
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Post by firstscoot on Jul 31, 2008 14:30:29 GMT -5
I not the smartest guy in the world but I'm also not the dumbest. I don't get your response. Are you saying that you will have problems if you don't upgrade your gound to 4AWG? I'm saying you may have less problems. It's fairly obvious the "quality" of the Chinese battery cables is, uh, suspect? Got it!! |
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Post by justbuggin on Feb 28, 2011 13:04:50 GMT -5
does any one know why i am getting 16+ volts i thinking the voltage reg. is fried as the person had it before me ran for over a year with a bad battery
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Post by medman1952 on Feb 28, 2011 13:21:46 GMT -5
I think you are right, sounds like it is running at full charge, if it is doing that all the time, you will ruin the battery, your lights might burn out faster also.
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Paint in not a good conductor. I took some sand paper and sanded down to nice shiny metal. I then hooked up the three ground wires. Now for the test. Unlike in the past, my volts jumped immediately to 13.8 volts by just starting the engine. I then revved the engine. 14.5 volts!! ;D
