classic battery warning light

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billrand

Active Member
Posts
103
hi guys just wondering if anyone could shed some light on a battery warning light that has suddenly appeared, soft glow on tick over and brightens as revs increased

Just checked battery with meter holding 12.2v and when on tickover showing 14.1.14.2v , but light still faint glow and brighter when revved?
 
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hi guys just wondering if anyone could shed some light on a battery warning light that has suddenly appeared, soft glow on tick over and brightens as revs increased

Just checked battery with meter holding 12.2v and when on tickover showing 14.1.14.2v , but light still faint glow and brighter when revved?
What is the voltage when the car is running at higher revs?
 
ok if it is does this mean the battery is not charging properly, and its not a rush job or do i need to get on it : )
 
Just checked battrery again and seems fine holding 12.6v and charging 13.8>14,3v, noticed warning light also gets brighter when load applied ie indicators it flashes, lights heater etc
What exactly do the diodes do? if battery ok and charging is it essential i replace the pack on alternator :)
 
The positive end of a diode is the anode, and the negative end is the cathode. Current can flow from the anode end to the cathode, but not the other direction. Think of it like a non-return valve.
 
Just checked battrery again and seems fine holding 12.6v and charging 13.8>14,3v, noticed warning light also gets brighter when load applied ie indicators it flashes, lights heater etc
What exactly do the diodes do? if battery ok and charging is it essential i replace the pack on alternator :)
The charge light provides the excitation current to kick the alternator into life, thence as the voltage rises at the alternator, the light goes out as it has 12 volts on each end.
As you have a Classic, I would expect the maximum charge voltage to be 13.8 volts, the fact that it's getting up to 14.3v suggests that the regulator is not working. In the extreme, it could cook the battery or burn out the armature of the alternator, depends on exactly what is going on.
 
ok cool thanks : ) so would appear no great rush to sort the snag as battery and alternator seem to be working ok?
will check tomorrow though if that voltage regulator will fit my alternator
 
Sorry Datatek completly missed your post , ok im on it will see if i can get a new regulator if my alternator has a seperate one fitted
 
Thanks one and all, my alternator is RTC5680e, so i am getting the regulater mentioned earlier in the thread equivalent to rtc5670? can anyone point me to any intructions on how to replace it :)
thanks in advance
 
Thanks one and all, my alternator is RTC5680e, so i am getting the regulater mentioned earlier in the thread equivalent to rtc5670? can anyone point me to any intructions on how to replace it :)
thanks in advance

Looking at the rear of the alternator it fits into a slot in the back. looking at the regulator it looks like three screws hold it in place and it slides out in line with the connectors.
 
i lied :) given a choice britpart,allmakes or bearmach obviously land rover oem out of the question cost wise lol
 
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