Will not charge or luminate main light

the small lights on when you switch?Try to switch the small lights together with the main light at the same time..If the small light will off when you switch the main light is meaning that the batery is too weak.Thus you need to charge,but your one problem is that it doesnt charge?Check the wire if it has cut or loosen connector.Most of the problem about charger is the wire itself due to a regular shagling or moving during a charge will perform.If the wire is good,next to check is the fuse.,Finally,if all these mention parts are good,you must check the Rectifier Diode if it is shorted.If not,then you need to replace the batery because the problem is that it is not charging,but it is not storing a power on your batery.
On the other hand,,if at the same time you switch the lights and the small light is still on but the main light is still doesnt work: check if there is a fuse and see if it is open,or check the main bulb itself because maybe it was opened too?