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Post by djp1987 on Jun 12, 2018 15:35:13 GMT -5
checked/replaced fuse, even though it was good
no burned or cut wires anywhere
nothing else affected by the failure except neither headlight bulb will light. and they both worked until recently
no mods to electrical system. and no damage anywhere either
the bulbs only lit when the motor was running when they were working (normal), and the led running lights still work, as do brake and turn signal lights.
anyone have an idea why? oh the scooter has only been driven for about a month and only has 300km on it, so i dont think BOTH bulbs could be blown, could they? like from a hard bump or something?
also what bulb does this scoot use? i only ask that because i cant be bothered to remove the headlights again to check except as a last resort if by some curse both bulbs blew at the same time.
thank you
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Post by jackrides on Jun 12, 2018 19:22:37 GMT -5
What is your scoot? Do you have a manual or a wiring diagram? Do you have any electrical experience?
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Post by humanshield on Jun 12, 2018 21:09:34 GMT -5
Yes, they "could" both be blown. Low mileage scooters and especially new ones suffer from bad assembly disease often. Wires are crossed, things are connected wrong. Everything you say still works is battery powered. You should check the output of the yellow and white stator wires. Those provide power to the lights and charging system. Is your battery getting weaker and weaker?
Could just be a disconnected wire. Or, could be a bad stator, regulator, ground etc. You'll probably need help unless you're pretty good with stuff like this. |
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Post by lilpinny on Jun 12, 2018 23:02:54 GMT -5
I'd try replacing a bulb first. Simple things first. When I've blown bulbs before, for whatever reason, they both go at the same time. I chalked it up to the wrong bulbs being in there (too many watts) and/or bad wiring.
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Post by greginisn on Jun 12, 2018 23:58:29 GMT -5
There is a 2017 TaoTao Thunder schematic on this forum somewhere and according to my schematic the headlights are fed from the alternator's Yellow output wire and there is no fuse involved. There is a possibility the headlight connectors are loose or the switch has failed. There's not much else involved but you're going to have to pop that front cover off again to make sure you have voltage where you need it and your connections are good. Be sure the ground for the headlight is good too. But if you don't have a diagram check out the one in these pages. Greg Link to the diagram 49ccscoot.proboards.com/thread/340/manuals-documents |
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Post by djp1987 on Jun 13, 2018 4:52:07 GMT -5
@all who replied: thanks. i am a bit rusty with my wiring skills. been a while since i have dealt with it. i did a quick pdi and all was well for the most part. humanshield battery seems fine so far, not getting weaker after multiple starts (not yet anyway) everything is connected as it was when they worked. lilpinny what bulbs does this scoot use? taotao claims they are led (doubt it, i think they are talking about the running lights) greginisn connectors are pretty tight. i hope the switch didnt fail, how often does that happen? also where does the ground for the headlight ground to? to save time searching for it. |
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Post by greginisn on Jun 13, 2018 5:45:10 GMT -5
I never did chase that headlight ground wire out to see where it went but on my Thunder there was a ground connection under that same panel that was screwed to the fork assy right behind the voltage regulator gizmo. So if there is any logic to these things that may be your ground point for the lights. On my Thunder that connector was a bit buggered. As to other ground points you just gotta look somewhere under the seat & body plastic and the engine.
Re switches: how old is your scoot, does it sit outside in the weather and get wet? Has it fallen over? Those conditions can bugger up switches very quickly.
Good luck, Greg?
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Post by djp1987 on Jun 13, 2018 10:10:04 GMT -5
scoot is a 2017, never wet, garage kept, no falls. though i may have found a cause. the white wire that connects directly to the low beam bulb, not the metal piece with 2 screws holding the retainer, was slightly burnt. missed that on first inspection. bulb is also discolored like it was case-hardened almost.
high beam bulb and its blue lead wire and all of the green ground wires still look good but high beam bulb will not light when in low beam socket.
are both needed for one to light?
could the short on the low beam lead have taken something else out? such as the switch?
the battery is still starting the scoot with no signs of dying, so i assume the stator to still be good.
i have driven the scooter a week after the headlights stopped lighting. gotta fix it though since the law in my state requires them on at ALL times. i got stopped hence why i am on here.
thank you
EDIT: the saw the low beam lead was disconnected from the headlight when i saw it was burnt. bad connection maybe? must've missed that
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Post by lilpinny on Jun 13, 2018 11:08:29 GMT -5
Contact parts for scooters for a bulb
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Post by lilpinny on Jun 13, 2018 11:15:08 GMT -5
Headlights have two fillaments, low and high beam. You can fry one without frying the other. If you have burn marks on the leads you could have had a power surge, which is how I have blown lights before.
But seriously, when you walk into a room and flip the light switch and it doesn't come on is your first inclination to take apart the wall switch and debug the wiring? It's a lightbulb, they go out.
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Post by djp1987 on Jun 13, 2018 11:40:01 GMT -5
Headlights have two fillaments, low and high beam. You can fry one without frying the other. If you have burn marks on the leads you could have had a power surge, which is how I have blown lights before. But seriously, when you walk into a room and flip the light switch and it doesn't come on is your first inclination to take apart the wall switch and debug the wiring? It's a lightbulb, they go out. this model scooter has 2 physical bulbs. both are the same wattage but only 1 is supposed to be on at a time. neither work at all. edit: only one shows damage btw... the low beam bulb |
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Post by lilpinny on Jun 13, 2018 11:47:12 GMT -5
Two bulbs are old style headlights. Not uncommon.
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Post by djp1987 on Jun 13, 2018 12:06:07 GMT -5
but do both have to be working/plugged in for just one bulb to light up?
if so, it would explain the problem. if not then there may be another issue
p.s. i promise i am not trying to argue, just trying to learn
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Post by lilpinny on Jun 13, 2018 13:28:29 GMT -5
I don't know how that scoot is wired. It could be the case that they both need to be there and working, but more than likely they are in parallel and one can burn out and not affect the other.
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Post by jackrides on Jun 13, 2018 13:42:38 GMT -5
Do the bulbs have one or two contacts on the base? What is the size (diameter of the glass) of the bulbs? If the wiring is correct, either bulb is independent of the other. What model do you have?
Gregism noted the ground wire from the headlight (Thunder model) was screwed to the fork assembly. I would definitely splice a new wire into that, tape it to the harness, and connect it to a secure ground on the engine, battery negative wire, or other good ground wire in the main harness. I think electricity flowing thru fork bearings is a bad idea.
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