Ive lost low beam on the headlight, theres power to the handlebar hi low switch and switch is working fine and theres hi beam power to the head light but no low beam power entering into the headlight ?
checked the fuse system was working fine and earth to the globe is fine hence high beam ?
Could be the contacts in the Hi/Lo switch need cleaning, although one would think that a couple of quick cycles of the switch would show something.
Fuse OK, Globe OK, power to the switch and Hi beam all OK, then there's gotta be an open circuit somewhere between the switch and the Low beam connector.
Exactly, i reckon
Just scratchin my nuts here - but there are 2 filaments in the lamp - one hi and the other low - earth to the common of the 3 terminals and power (the other 2 terminals) switched between the low & the hi terminal - you can only have one beam on at a time! So maybe the Low beam filament has blown - did you check the lamp (without putting your fingers on the lamp glass)? Have you got a Multimeter? Check with Ohms for continuity on common terminal to each outside terminal! Sometimes the lamps have a fusible link in the guts of the lamp so this blows and the filament don't smack about inside and foul the good filament.
The filament start to fail - breaks down (old age, vibration, poor connection during manufacture etc) - resistance increases - current increases - fusible link in lamp blows before fuse (to protect the rider at night -at least you still have one beam to ride with - none if the fuse blows!!!)
I have had a lamp that was 5 days old blow the low beam and others that just glow orange (like old holden headlights - FJ vintage )
Just a thought and just looking at the lamp may not give up all its secrets - but a multimeter will (Good ol' German Physicist - George Ohm)
the globe works fine i tested it might have to put it in the shop im not that up on it with electrics especially when it could be hidden i wonder if there is a break in the power coming from handle bar switch as it has handle bar internal wiring fitted after factory
Keesh! How did you test the lamp? With what and how????? Did you try another lamp/bulb as suggested in another post? What model bike is it?
Try to be a little more forthcoming with details so you can get precise help!!!!!
Did you use a multimeter (or test lamp - 12v globe with a couple of wires soldered onto it) to check the power at the headlight socket/plug - if you have power at the low beam connector then there is only two things that it can be - blown lamp (or globe) - (the earth is ok because it is common to the hi beam) - low beam filament or the other thing is you have no idea what you are doing and should take it to a dealer or auto sparky!
Keesh, try checking continuity between the switched side of the rocker switch and the headlight wire....this will tell you if you have an open circuit in that wire. Also check both ends to earth as well, if you have continuity to earth from either end, it may point to a chafed wire inside your bars somewhere. Could be the problem if aftermarket internal wiring done, especially if bars have been drilled by hand to suit.
In case youre not sure how..............connect each end of your multimeter (set on resistance - Ohms) to those points, if you have a reading of zero (continuity) then wire is good. If you have high or infinite resistance, you have an open circuit which means the wire is broken. If you have a reading from either end to earth (handlebars) of zero, then you have a short circuit.
Burto.
