Vehicle & Technical > Defender

Electrics / battery/ alternator

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Monkeymantulp:
My 90 2.5TD has been a bit of a pain to start since i had it in November with warming the coils, but always has started...

Few weeks ago it started to play up and have battery problems (put down to the cold also) , i've managed to kick start it and it runs fine, but no charge is kept in the battery and would need kicking again the next day even after a long run.

I went for a free battery test and they said my alternator was barely producing 12V's of charge and the battery is on it's way out. This would be fine, but it's had a new alternator a few months before i got it...

Is there any checks i can do to see whether it's needing a new alternator and battery or just battery (i.e earth faults) ?

Cheers in advance
Nick

fezzy192:

--- Quote from: Monkeymantulp on February 01, 2009, 21:40:06 ---My 90 2.5TD has been a bit of a pain to start since i had it in November with warming the coils, but always has started...

Few weeks ago it started to play up and have battery problems (put down to the cold also) , i've managed to kick start it and it runs fine, but no charge is kept in the battery and would need kicking again the next day even after a long run.

I went for a free battery test and they said my alternator was barely producing 12V's of charge and the battery is on it's way out. This would be fine, but it's had a new alternator a few months before i got it...

Is there any checks i can do to see whether it's needing a new alternator and battery or just battery (i.e earth faults) ?

Cheers in advance
Nick

--- End quote ---

hi nick check the earths on youre car as sometimes bad earths can make you alternator not kick out enough voltage

Monkeymantulp:
When i try and jump it with another battery, all i get is clicking from the starter, is this just a case of low voltage or has that gone aswell?

Nobber:
a clicking from the starter means low voltage.
that could be a faulty alternator not charging , a weak battery not holding charge , a dodgy starter drawing too much power after the solenoid kicks in , a weak earth or live connection , a dodgy ignition switch or , if there is one a dodgy relay in the ignition circuit.

go over it methodically with a volt tester thingy. if you google it you will get all the correct voltage readings for testing the ignition/starter/battery/alternator etc.

try a different battery if you can to try and rule things out but you really need to go over it with a volt meter to find out where the voltage leak or weak point is..

figgy:
re poor starting  engine.have you checked the voltage while starting from cold .connect a volt meter to your battery an check that you have 9.5 volts when cranking the engine  .it should be no less than 9.5 volts when starting .

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