Right, i changed my alterntor because it was failing, fitted a used used one the battery light was still on, done all the checks 3 pin plug was ok check the red wire for connectivity all was good. This was charging better than my last alternator was put it under load and it dropped below 12v and never raised to i was happy it was the alternator and was organising to get another sent out(budget as very low on cash at mo).

Well weirdly today i took my car out at risk of breaking down to sort some stuff out, parked up 10 mins later moved off and the light never came on again, it hasn't been coming that much now. This is the same problem my old alt was doin before the battery light would come o then go off and eventually would always come on 15-20 odd seconds after car started, with the light on my front dimister doesn't work either.

I am still thinking it is the alternator some more advice would be great, for now the batt light is out but for how long i don't know. when i am abit more flash with cash i am looking at a brand new alt and drive belt but for now have to do with what i have.