Alternator light - False signal

[4x4Que]

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Good day,

I have a 2005 4.0 V6 D/c Hilux.
On a recent trip the alternator light came on(the red battery on the dash) expecting the battery to die I was surprised when I got home and all was working fine, and has been for the last week and a bit.
I went to a auto electricians to have the unit tested. All tested 100% they mentioned that the voltage regulator might be giving a false signal to the dash.

They also mentioned that they have to remove the alternator and see if the voltage regulator can be replaced. Apparently on the Denso models they can not and then its a new alternator!!!
if its a Bosch they can replace just the regulator.

Any had this problem before?

[Sudesh]

Yes i did on the bosch alternator, changed the regulator as this was a cheap fix, problem still there checked the wiring stilll there replaced the alternator and problem gone.

[4x4Que]

Yikes,
What was the price on the replacement Alternator?

[Sudesh]

Hi
I manged to find one on junk mail but had to drive 350Km cost 2500.
i was lucky, new is about 6500-8000.

[Sudesh]

I can find out the price to recon as i have a friend who works at Bosch.

[4x4Que]

That would be great thank you!

[Bazzer]

The Denso alternators are serviceable and you would not have to replace the whole unit. I had mine (D4D) and a friends done previously.

[lukestoyzx]

There's a guy here in aus that reconditions them. Replacing the reg/rec so its not temperature controlled anymore and replaces the dodgy one way pulley with a solid one and all at a fraction of the cost of a new unit.

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