Vehicle & Technical > Defender
urgent help
SimonHarwood:
Try a continuity check between positive and negative with an auto-ranging multi-meter (with the battery disconnected). If you get a reading and you are sure that everything is off then there will be a short somewhere. You will need to physically disconnect everything that you know is powered when the ignition is off. You may also need to disconnect the alternator.
If you know someone who has an insulation tester (any electrician), you could ask them to test the insulation for you. You would definitely need the alternator, plus anything electronic (radio, CB, alarm, etc), disconnected for this even though the nominal test voltage would only be 250volts.
piggysteve:
Could it be a short through the alternator ?
Saffy:
Have you checked the voltage at battery with engine running - the alternator might be chucking out way too much voltage, though it usually the alternator you smell cooking first. You should be getting around 13.6 - 14.4 volts max. Then turn off engine and you should immediately a similar voltage across terminals which drops back a bit depending on the charge. Your 11volt is a flattened battery, might have internal fault if you getting only that after a charge.
bertie_bas205:
As Saffy said, though I'd try a different battery in. Could be a buckled plate in the battery...
Bertie.
suggs:
cheers lads
ive got the battery on charge now so i can test the alternator, spoke to my local landy garage and they would put money on it being the alternator gone, as you say the voltage regulator if knacked will put way to many volts into the battery.
think the battery will be fryed now though, its fairly new so should get it changed under warrenty as the garage said they will just back it so shouldnt be an issue..
ill update when the battery is charged and i get it running, thats if the battery will hold a charge to get it started, otherwise ill jump it.
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