What's going on with the battery of my Zafira?

Hi. I drove my car, a 1999 Opel Zafira without a fanbelt for about 10km after which I replaced the fanbelt. The battrey that was discharged quickly charged itself. Some days later the battery discharged and even after I recharged it it still discharged again. So I replaced the battery after confirming that the alternator was ok and still am having the same problem. What can I do? Is there a possibilty that the alternator is not providing enough charge to charge the battrey? How can i test the charging terminals of the car with a multimeter to know if it is in order? Thanks

Ndukwe Peter (Abuja )

May 2013 Filed under: electrics

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Expert answer

Hi Peter,

It certainly sounds like the alternator is not doing its job. Could you have disturbed the wiring from it when you fitted the fanbelt? Easiest way to check is to check the voltage across the battery terminals with a multi-meter while the engine is running. It should be well over 12V if it is charging.

Please be careful doing this though and only if you're confident working under the bonnet. If you're not, best leave a qualified mechanic or auto electrician have a look.

Let us know how you get on.

Shane O' Donoghue - Complete Car Adviser
@Shane_O_D