battery not getting the voltage from the alt?

car broke down the other day and rac said the battery is not getting charge from the alternator



I have tested it with a voltage meter and only get 12.17 at the battery



from the wiring off the alternator I get over 14 volts

one on the red + connector and the other on the engine -



the car starts + drives fine, now the battery has been recharged

(not going anywhere till I get 14v at the battery)



are there any common places where it will break and cause problems?

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