On the needle of the Volt Board of a GMC Safari 99 marks as 9 volts must have the alternator to check with an electric and told me that it is good if you are loading and when you open the key if you mark the foquito of the battery and when it turns it on it goes out but the volts of the board does not mark me as it should be thanks ...
It is easy, check with a multimeter if you are really loading, if it is above 13.2v then it is loading, and what does not work is the engine of the board
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