Alternator lamp will not go out with new internal regulator alternator installed...

I have a 1971-911 have installed a newer alternator with a built in regulator, the system is charging because I have a volt meter mounted in the car but the alternator light stays on. I know its something simple, any suggestions?

Doug

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This post was auto-generated based upon a question asked on our tech article page here: Pelican Technical Article: 911 Alternator and Fan Replacement & Upgrade

[Wayne 962]

I just ran into this issue the other day with another customer. I have a PDF of a Porsche Technical bulletin that talks about putting in a higher wattage bulb to assist with getting the lamp to go out. I have the link here: http://www.pelicanparts.com/techarticles/911_alt_replace/Alternator.pdf

- Wayne

[Joe Bob]

I'm not above confirming the reading of a 40 year old dash gauge. The light is part of the charging cicuit.

[kodioneill]

You need a higher resistance in the bulb circuit. You can add a resistor across the bulb contacts to achieve this. Use the search function you will find the value of the resistance needed. I think you need 84 OHMS at 5 watts.

[LUFTMAN]

i have the plug in resistor kit ready to plug on to your altenator charge lite as per factory tech. update. $20.00 shipped