right got a escort rst, which has a charging problem, its got a new battery, new starter motor has had 4 new 70 amp alternators on it, all warranty claims, replaced all engine to body/battery to body earths, checked all resistances through main battery leads found nothing wrong, still acts like the battery is flat, when its running and your driving, turning heater on, or electric windows, the battery lamp comes on dimly has anyone got any ideas?