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Battery keeps going dead

I've had problems since I bought the van in February, firstly the auxiliary belt would squeak until the engine warmed up and on occasion the battery would be dead, now the belt hardly squeaks and at night the lights start getting dimmer after a short while and the battery is dead every morning, the battery is good and the battery warning light is not on. I checked the battery while running with a multimeter and it reads 24v. I'm going to check the output of the alternator tomorrow, what should it read and could this be anything other than a faulty alternator?

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  • andy stuart
    andy stuart Apr 13, 2014

    How do I check the alternator at the battery, where do I put the multimeter contacts? And which setting?

  • andy stuart
    andy stuart Apr 13, 2014

    i get you idles at 12v and decreses to 10.7v with a little revs, the belt is slightly loose but not excessively, does this mean the alternator is knackard?

  • jim sharp Apr 13, 2014

    make sure the belt is tight, if it still doesnt charge, you will need to replace alternator



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24 volts is way to high, the battery should be 12 volts, the alternator should put out 13 volts up to 15.5 volts, if the alternator belt is excessively loose, it wont charge properly, if the belt is tight check the alternator output, (you can ck it at the battery) make sure the output is a minium of 13 should be not less when reving the engine up a little the voltage should increase, but not above 15.5 volts

Posted on Apr 12, 2014


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