Hello. I'll give step by step the problem experienced. 97 Ford Contour 2.5 litre. 66 mile journey. Noticed RPM gauge set at zero some time about 50 miles with a few times engaging. Parked car for several hours. Car running smoothly the whole time. Starting to return the 66 miles. Car running in driveway, about ten minutes then noticed the headlamps very dim as well as dash lights. Drove away and car started spitting with no power. Power windows slow to roll and turned right around after a few hundred yards and coasted, NO GAS PEDDLE (because that's all she'd do) back to my starting point. Thank Goodness. Turned her off. Tried to restart. Got the dreaded clicking. Took a little over an hour for hubby to fetch us at which time we were going to push her in the driveway but thought I'd turn the key. Started right up. Ran normally for about 10 minutes. Repeated problems exactly till restart and then the clicking. Is this our alternator? Thank you for your help. Car still stranded.