Alternator Charging Light Problem

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Forum Name: General Discussion
Forum Discription: General Mobile Electronics Questions and Answers
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=41991
Printed Date: June 08, 2024 at 5:53 AM

Topic: Alternator Charging Light Problem

Posted By: nzbug
Subject: Alternator Charging Light Problem
Date Posted: October 31, 2004 at 6:06 PM

Hi all,

I don't know if this is the correct place to ask this, but there seems to be a lot of knowledge on these forums so here goes...

I have rewired my VW Beetle recently with a Watsons Streetworks wiring kit, (which is awesome by the way)....and everything is working fine except the alternator charging warning light.

I orignally had a 12volt bulb installed for the alternator charging circuit warning light which worked fine but have since replaced all my warning lights with bigger, better, brighter 12volt LED warning lights, but now the alternator charging light won't go out when the car is turned on and running like it used to!

Any ideas why this would happen? If I have to take the LED out and replace it with a standard bulb again to get it to work properly I will, but if there is anyway to make it work with an LED that would be better posted_image

My alternator is a Bosch A82X internally regulated 1 wire model. I am thinking that because the LED is a lower resistance than an equivalent standard 12volt bulb, this could have something to do with the light staying on???

Thanks in advance
Mark

Replies:

Posted By: Teken
Date Posted: October 31, 2004 at 9:43 PM

nzbug] wrote:

I am thinking that because the LED is a lower resistance than an equivalent standard 12volt bulb, this could have something to do with the light staying on???

Yes . . . Find out the power / wattage, or the current the bulbs consumes, this will tell you how to figure out the resistance to be placed in series to the LED.

Regards

EVIL Teken . . .

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Knowledge is power. But only if you apply that knowledge in a positive way, which promotes positive results in others.

EVIL Teken . . .

Posted By: pedrodaman
Date Posted: November 01, 2004 at 1:43 AM

you have to have the bulb in the circuit the regulator gets its voltage to energize the rotor via the bulb which allows a small amount of current through. the led does not allow enough current to flow to the reg/rotor hence will not work . try putting bulb back in with led in parallel will then will work

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mountainbiker rules

Posted By: nzbug
Date Posted: November 01, 2004 at 1:31 PM

Thanks guys, awesome info....

Pedro, will give the Bulb in Parallel a go....that might do the trick..... :)

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