GMCforum
For enthusiast of the Classic GMC Motorhome built from 1973 to 1978. A web-based mirror of the GMCnet mailing list.

Home » Public Forums » GMCnet » Generator Light
Re: [GMCnet] Generator Light [message #336472 is a reply to message #336471] Tue, 28 August 2018 20:22 Go to previous messageGo to previous message
JerryW is currently offline  JerryW   United States
Messages: 256
Registered: August 2018
Karma:
Senior Member
15’u volts seems a bit high unless your battery might be completely dead. After a short time the voltage should drop to perhaps the high 14s. A generator light on all the time is usually associated with the diode trio inside the alternator.
It may have tested right but there still could be a problem.
Can you try putting on another alternator and see if it works properly?

Emery Stora
77 Kingsley
Frederick, CO

> On Aug 28, 2018, at 6:32 PM, Bruce Hart wrote:
>
> Need some advice on why the generator light won't come on when I turn the key switch to on position.
>
> Generator light will come on bright when I start up the engine and stays on.
>
> I checked the voltage at the isolator and was charging at 15.7 volts.
>
> This also happened to a spare alternator I had. Both alternators tested good at NAPA
> --
> Bruce Hart
> 1976 Palm Beach
> Milliken, Co
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org

_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
 
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Previous Topic: [GMCnet] Oil pressures/volume. Myth/fact. And what GM required back in the 70's.
Next Topic: [GMCnet] GMC soon to be for sale..still gathering thoughts and pictures !
Goto Forum:
  


Current Time: Mon Jul 01 04:04:35 CDT 2024

Total time taken to generate the page: 0.01801 seconds