well im going to dig this thread up , as this is now the same problems im having now
it started a few days ago
the same warning lights come on the instrument panel, and the battery slowly discharges, right to the point where the car eventually stops, luckily i was parked out side my house at this point, thinking it was the battery which is 2 years old i took the car to lexus, after i charged the battery up for a few hours, technician said the battery was ok, but a little discharged and suggested a bench charge for a few days to get i up to 100%
on driving home i get the nearly dead lexus (typed above) charge it up again and everything will run till the battery disharges,
any way, while the car was running i stuck a V meter across the battery and i got a whopping 11.8v across the terminals when the engine running m so obviously the alternator isnt working , i had a look for the 100 amp fuse and if its the one in the engine bay, even tho i couldnt remove it to test properly it visually looks ok.
*update today*
i went out today after reading this post to see what i can see, fusae looks ok, wiring looks ok, everything looks ok, belt ok. i have notised that there is a fair bit of oil and crap on the alternator, which apparantly they dont like,
plus i went out and started the car, it started after 8 hours so its not a slow short as battery still had enough life in to fire up it up, listening to the revs there seemed to be a noticable difference in rev speed, once speed gave me no volt increase on battery , other speed gave me 14.1 volts, when it settled down , i got 11.5 volts across terminals,
car is a 1996 with 133k miles on, alternator is origional , im thinking its just given the ghost up , what you think
, oh a new alternator is 150 to 250 £
Steve