I have had my alternator tested and it would seem that its not putting out enough voltage.
I have phoned Nippon direct and a new alternator in exchange for mine is £130. So I have ordered one and will return the new Voltage regulator I have which has cost me £130 and be no worse off.
Will update when the new one arrives and is fitted.
Right the new regulator did not fix the problem, a new alternator has not fixed the problem as the battery light is still on. Could the car be that smart that its telling me my batteries are on there way out...surley not.
In the manual all it says is the light indicated batteries are discharging and drive to toyota.
Any other bright ideas as i went to my local tyre battery and exhaust place and the chap put a volt meter on the batteries with the car running and said nope they look ok.
I would think they should be able to test them under load?? Does Halfords do such a service?
For saftey i am not running anything electric in the car whilst driving but do have my doubts as to if they are ok. I have just called my local halfords and spoke to a very helpfull chap who said they can test the batteries under load aswell as each cell so will pop around tomorrow.
As said above could the 100 series be that smart that is will warn you if your batteries are on thier way out?
It would be the negative cable coming off one of the batteries going on to the engine and/or chassis / body.
It'll be a heavy duty cable, running down to near the starter or somewhere onto the block.
You've checked regulator as well I take it? And I assume also the alternator belt is tight and not slipping? And the alternator adjuster tensioner not worn and flexing?
Thanks ill double check it again but yes I replaced the VR in the old alternator which did not help. I then replaced the whole alternator but still the light was on. So next replaced the batteries and checked the negative from the engine block to the negative on the battery and its ok but the light is still on.
The 100 has 2 belts both V and both are good as you tension them by moving the alternator out with a bolt.
Not sure if this helps but when the problem started the battery light would only come on over a certain rev and then go when you took your foot off the accelerator but now it’s on permanently from start to turn off.
I am stumped. Ill post on the SA and AUS site and ask there along with Mud.
It is with great satisfaction and relief that I can announce that I have solved the problem. It has taken me the best part of nearly 2 weeks and removing and installing an alternator 6 times before the solution was found.
I have spent just on £650 for new batteries and a new alternator along with a replacement voltage regulator for the old alternator to find that it was a 20p Fuse at fault!!
I never knew there was a 7.5amp alternator fuse in the fuse box in the engine bay but for whatever reason it was blown and having replaced it has solved the light on the dash.
I have learnt a lot about alternators and batteries so not all in vain but next time I would like to think I can solve the problem faster and without much hassle.
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