Low beam not working.

High beam is ok but low beam not. Connector has voltage but nothing seems to be happening. This is on a 07, only just happened as MOT was done when I bought it a month ago

[DJ123]

Daft question, but does the low beam part of the bulb work? Is the filament in tact?

[Bibio]

check the fuse box under the pillion seat. will be marked on inside of the lid which one.

[SV650rules]

Originally Posted by suzukijax

High beam is ok but low beam not. Connector has voltage but nothing seems to be happening. This is on a 07, only just happened as MOT was done when I bought it a month ago

Does the connector have 12volts on both high and low pins compared to common connector ? As already suggested try a new bulb as the filament can look intact but they can fracture. Sometimes if you tap the headlight it can cause filament ends to touch and light up briefly.

Daddyjob. Yes put bulb in different bike and it worked on low beam. Filament is in tact.
Bibio. Yes swapped high beam fuse to low beam and didn't work.
SV650rules. Lower voltage 11 volts on low beam.

[SV650rules]

Try measuring the voltage with a bulb plugged in, If the 11volts disappears with bulb in then you have either a bad contact in hi -low beam switch or somewhere between switch and bulb.

Thank you he will give it a try. Probably Monday as he is working weekend. If he gets round to it I will let you know.

Still no joy. Voltage at fuse 11.94v. Voltage at white connector at headlight / sub - loom 11.83v. With bulbs in 0.05v. !!!!!

[Bibio]

i take it this is a naked bike?

if voltage is ok upto the connector then i would presume that its a negative (earth) fault. to check run a separate wire from the negative (earth) wire at the bulb holder to the battery negative terminal. you can also do a visa versa with the battery positive going to the low/high on the bulb holder.

once you have established which circuit is at fault then its just a case of tracing back the loom till you find the problem. most of the time with the SV its furred up terminals in connector blocks.

Thanks for the quick reply Bibio!
It is a sport, with twin headlights.
Managed to get the low beam to come on by connecting the earth directly from the battery to the earth pin on headlight white connector, and feeding a wire directly from the battery positive terminal to the low beam pin on the headlight white connector.
They also work using a direct connection to the battery earth as above and taking the positive from the highbeam feed at the fuse box, however the voltage drops from 11.9v to 9.5v.
If i connect directly to the low beam feed at the fusebox the low beams don't work, and the voltage drops to nearly 0 volts.

Edit to add - tried connecting loom up normally, and running an earth from one of the bulbs directly to the battery -ve, still no low beam =0(