gilera stalker electric problem?

I have a 2003 gilera stalker and the back light is very dim howerver when I put full beam on the back light becomes bright

keith
November 2008

also check to see if the alternator is puttin enough charge in to the battery should be between 13 and 14 volts

sean
August 2008

Let's get the obvious out the way first.check the main fuses.then check the new battery "is"charged,sometimes the come dry charged,this means no acid in cells.check that.then using an indicator bulb or similar connect direct to battery and see if it lights up.then check all battery terminal connections for clean bright metal to wire.while Im at it use the indicator bulb again on the old battery to check that.after this it gets complicated.

caine
August 2008