low voltage

1999 Ranger XLT 3.0L Having low voltage anytime I drive it in hot weather. On a cool morning the starter and engine turn over just fine. I drive it to work, turn the truck off and if I try to turn it back on it sounds like the battery is low and the starter is barely able to turn over. If I am...

I have a '94 3.0L (Manual Transmission) 4x4 Ranger that I've been rebuilding. It has been starting just fine until last night. When I tried to start it, everything went dead - no dash gauges, no lights, no fuel pump sounds, nothing. I made sure the battery was fully charged. I put a volt...