"Then check the the black (negative) to see if it is frayed with wire exposed, all the way to the ground (body of the car) and if the connections are loose. Then check the red (positive) all the way to the alternator."
You may have to drive the car up a ramp or put it on jackstands for the red (positive) to the alternator part.
"Disclaimer. Never work under the car with just the temporary or hydraulic jacks (that you buy from parts store). Serious injury could result if the jack fails and the car falls down".
