Vehicle & Technical > Range Rover

charge light not on but glowing

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barriesheene:
hello peep's  :D I've just noticed driving home from work that my charging light has acquired a very faint glow  :-k It's not on as such........... But it is definitely glowing slightly with a slight flicker. I've had new belts fitted recently cause the alternator belt snapped. How do I check the output from the alternator and weather my battery is on it's way out ? Or are they just prone to playing up ???/

Range Rover Blues:
Hi Barry.  If it's glowing then there's a chance it's working but not keeping up with demand.  Things like the heater can draw a lot more current than perhaps they were designed to do when new.  Get a voltmeter and check that the output is well above 12volts witht he engine running, check it at the battery with everything switched off.  Once you're happy with that, it should be up to 14.3 volts, start switching things on and watch the voltage fall.  If should be able to supply 12volts at the rated current draw (65 amps as standard) with the engine at a fast idle, no more than 2,000rpm certainly.

If it can't do that then you need to get it looked at in more detail.

Terranosaurus:
I've had this before and its usually the alternator is well on its way, it's producing so little voltage that the battery is able to overcome it and light the indicator bulb.


ie

battery voltage - alternator voltage = voltage across bulb


I've often found this to need nothing more than a new set of brushes, thats if you can get them for your alternator.

hairyasswelder:

--- Quote from: sptb on January 04, 2008, 14:06:50 ---

I've often found this to need nothing more than a new set of brushes, thats if you can get them for your alternator.

--- End quote ---

£8 off e-bay  ;)
lucas brushes

barriesheene:
Thanks guy's I'll delve abit deeper  :D

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