HEADLIGHT!!

[Templar]

Hi all

im really stuck now on what to do! i have looked all over the internet and just cannot find the solution.

The problem is: i have a chinese, tiawanese crapese 125, its a cg replica that i have ratted.

the bike is fine apart from the electrics, i cannot for the life of me get the headlight working! i have tried all the fault finding i can like bulbs battery etc and nothing. i bought a new loom and nothing.

the back light and brake lights all work fine apart form the headlight?
the headlight used to work perfect with both engine running and without.

Please help!
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When all else fails, take a hammer, lift it high and whack yourself.

[nightshaddow]

When all else fails, take a hammer, lift it high and whack yourself.

chances are the swtch gear is broken or wired wrong, china land of cheap fails
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"WHAT DO YOU MEAN 100 MPH THATS IMPOSSIBLE Its chinese OFFICER."
Current rides CB 125 TDE(the next project) NS125RK ( now on the road ) CB125TDC (soon to be project 17) melody ( the nephews )

[G]

[Templar]

im not any good with multimeters, i do have one tho

looked at switch gear and all LOOKS ok, bearing in mind my electrical side is shite! i didnt make it to level 3 in college lol
____________________
When all else fails, take a hammer, lift it high and whack yourself.

[scorps]

you cleaned your bike? good grief, I have a man for that
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Do not presume that I am male.

[c_dug]

Electrics should be simple if you're methodical about it, start at the end and work back.

An easy way to find a lighting fault is to take a length or wire and bypass each section until the light doesn't work anymore. So start with the light connected directly to the battery and work back through the circuit until you find the bit that stops the light working.
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I am a bellend, I am a man of constant sorrow, I am a gummy bear, I am a rock.

[G]

You will need two basic settings on your multimeter.

For DC voltage, you will generally put the black lead on the negative terminal of the battery.

Put the red lead on where you expect there to be power.

If it says 12.8v or something around that, it's good. If it doesn't, it's not.

For continuity (checking that there is a link between two points), either use the resistance settings (1 means there is no link, something between 0 and .999 means there is something) or there may be a specific diode/resistance setting - sometimes this has a buzzer so you don't even have to look at it (again, 1 usually means nothing and 0 good.)
You just need one prove at each end, doesn't matter the colour.

So, take the bulb out and for the earth contact for the bulb, check that has continuity to the negative of the battery.

Then if that's ok, check for voltage at the positive on the bulb.
Presuming that doesn't have it, go back a step - maybe to a relay, maybe to the switch on the handlebars, maybe somewhere else depending on the wiring diagram. Keep going back until you get to the point there is voltage - and your problem is after this.

You can also check for continuity between the positive and the positive on the battery.

[Templar]

i have a headache just reading that..........

thank you, i shall give it a good go anyway!!

ill take a look tommorow, just trying to make up a number plate holder that is road legal and sturdy!!

ratting is harder than it looks!!
____________________
When all else fails, take a hammer, lift it high and whack yourself.