03-30-2011, 08:22 PM | #1 |
Join Date: Apr 2007
Location: mn
Posts: 183
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5.3 volts at headlight on high and low beam
any ideas? thisis constant even when reved. the brake is also out. but the blinkers work.
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03-31-2011, 01:28 AM | #2 | |
Join Date: Jul 2008
Location: Idaho
Posts: 25,054
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Re: 5.3 volts at headlight on high and low beam
Quote:
Spud
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Spud "Never argue with an idiot. He will drag you down to his level, and beat you with experience." Mark Twain 2015 Zongshen ZS250GY-3 (RX3) 2006 Zongshen ZS200GY-2 (Sierra 200) 2005 Honda XR650L 2004 Honda CRF250X 1998 Kawasaki KDX220 Mods made to my Zongshen ZS200GY-2: http://www.chinariders.net/showthread.php?t=6894 |
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03-31-2011, 03:38 AM | #3 |
Join Date: Apr 2007
Location: mn
Posts: 183
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yea it worked yesterday /// idk whats up.
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03-31-2011, 10:36 AM | #4 |
Join Date: Mar 2009
Location: Sardis, BC, Canada
Posts: 25,977
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I've been thinking about this, and I don't suspect the stator or the regulator, since the bike runs and the blinkers work.
When you test for voltage, are you probing the ground connector for the headlight, or are you using a metal surface (meaning frame ground)? Try a reading again, and this time use the negative post on the battery. Also, it seems more than coincidental that the headlight dimmer and turn signal switch are located in the same housing. Any damage to the harness for the controls? Have you located the connector to see if a pin isn't properly engaged? Any corrosion?
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Weldangrind "I figure I'm well-prepared for coping with a bike that comes from the factory with unresolved issues and that rewards the self-reliant owner." - Buccaneer |
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04-02-2011, 09:53 AM | #5 | |
Join Date: Sep 2008
Location: Nashville, TN
Posts: 588
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Re: 5.3 volts at headlight on high and low beam
Quote:
My GY-5 did the same thing and I never could figure it out. Mine would read somewhere in the neighborhood of 10-11 volts at start-up. After a bit of idling, a noticable drop in the amount of light and voltage would drop to 5-6 volts. I even took the wire loom "apart" and traced all the wires. No breaks or loose connections. For some reason, the headlight was wired directly to the stator (way I got it). I checked the charging voltage at the battery when this happened. Start the bike...voltage 13-14 volts, as expected. After about 1 minute, the voltage would drop to 12.5 or so...battery charged up?? and the headlight would dim. The only thing that came to mind was the voltage regulator was somehow dropping the voltage when the battery topped up. Finally went with a switch relay and ran the headlight off the battery. {quote="WeldandGrind"]When you test for voltage, are you probing the ground connector for the headlight, or are you using a metal surface (meaning frame ground)? Try a reading again, and this time use the negative post on the battery. [/quote] Very good advice. I was using the wires to the headlight for ground. Bit of a different reading when I used the negative terminal. Didn't help with fixing the problem. Good luck, Bill R |
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04-02-2011, 11:27 AM | #6 |
Join Date: Mar 2009
Location: Sardis, BC, Canada
Posts: 25,977
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IIRC, the headlight has a dedicated lighting coil, and that's why it's wired directly. I've been studying a schematic for an old Honda, and the lead from the lighting coil travels through the dimmer and then straight to the headlight. In the case of the old Honda, the battery isn't related; to power the headlight off of the battery would be an additional strain on the other stator winding.
If the battery voltage is low at the headlight (and there is a dedicated lighting coil in the stator), there could be a problem at the winding, the wire to the dimmer, the headlight connector or the ground. When I recommended checking with the negative probe at the negative battery terminal, that was for comparison purposes. If the voltage reading drops significantly when probing the gound connector at the headlight, the ground is poor. That's usually solved by adding a ground strap from the engine to the frame.
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Weldangrind "I figure I'm well-prepared for coping with a bike that comes from the factory with unresolved issues and that rewards the self-reliant owner." - Buccaneer |
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