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I know its been asked before but despite searching I cannot find anything.

Would someone please be so kind to tell me how to check to see if its the battery or charger which is at fault in our caravan. The charger makes a horrible buzzing noise off and on, but the battery is also old so I'm not sure which one (or both) needs replacing.

Many thanks

may help.buy a tiny meter like the one at the bottom of the page.touch the battery post and a reading of 7.5 volts means the battery is fully charged.at 7.3 volts its half charged.with the EHU connected the battery will read about 13.5 to 14 volts and means the charger is working.a small meter is about £6.

Quote: Originally posted by michael on 27/1/2011

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touch the battery post and a reading of 7.5 volts means the battery is fully charged.at 7.3 volts its half charged.with the EHU connected the battery will read about 13.5 to 14 volts and means the charger is working.a small meter is about £6.

Post last edited on 27/01/2011 10:22:20

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Thanks Michael, thats the instructions I was looking for. Someone did give them to me ages ago but I lost them. Have to find where I put the multimeter now!

The battery is old and we intend to replace it with a larger one, but I don't want to do that if the charger is faulty - last thing I want is a new battery being damaged.

Quote: Originally posted by birder99 on 27/1/2011

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I think Michael means 12.7v is fully charged and 12.3 is half charged. 11.8 or less is discharged. If the battery charger is connected look for about 13.5v to indicate that charger is working.

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 Have to find where I put the multimeter now

see picture at the bottom of the page,shows where too put prongs.