i just sorted out the issue,, though the long way.. here is a story
i had checked 2 or 3 bulbs on it and brake light was not working,, bulbs were rand new and filaments were connected,, ,,
today i first confirmed my battery was giving 12.7 volts,, so removed the seat,, removed the wires going to bulb checked voltages when brake pedal was pressed was getting 12 volts,, but bulb was not glowing,, checked the continuity of the wires going to bulb from that point they were ok,,wires were ok,, so checked the voltages near the bulb by breaking the wire still was getting 12 volts so by now it became a[apparent that the socket was the culprit,, removed the rear light assembly checked voltages when brake pedal was pressed still the 12 volts there,, so the socket itself is ok,, was left with two options either the bulb is faulty even though it doesn't looks like ,, or the socket connections are not making contact with bulb,,
so tried visualising,if bulb was making contact,, it was indeed ,, tried another ok bulb still no brake light,,
got new bulb today from shop tried it and it worked like a charm,, tried the earlier bulb ,, it was not woking,, so the end result it was the bulb that apparently looked ok but was not ok..
ahh,,, it really made me tired ,,
end result .. like usual never trust whats on the label if its chinese item or local desi aka made in pakistan item..
also checked battery water level was ok,, but contacts had a huge cement in them so removed the rubber tried petrol on it cleaned them and reinstalled battery,,