Vehicle & Technical > Defender

battery light coming on when just after starting the engine

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westy 90:
after starting the engine on my 300tdi defender the battery light comes on very faint. Give it a little rev and it goes out. Any ideas ? i think it mite be the alternater. 

Axetamer:
Usually its the alternator, if you've been offroading the brushes can stick a little, if its a lucas type you can take the plate off the back of the alternator in situ, 3 screws hold it on, you may have to thin the wall on a socket to get them out as they sit in small counterbores, 7mm I think

ARMYBOB:
alternator

check out put it may work a bit but o/p will be down

i just changed a friends for this reason

its was 12.5-13 now up to 14v again

Saffy:
maybe check the engine idle speed is correct first before fingering alternator ?

crazymac:
Maybe even check the belt tension before you spend money??  :doh:

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