healeys
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Re: Generator Light

To: "Ned Smith" <smithn00@kitepilot.net>,
Subject: Re: Generator Light
From: Bob Spidell <bspidell@comcast.net>
Date: Sat, 31 Dec 2005 07:50:45 -0800
One minor technical nit: 

The unloaded voltage of a "12V" battery should measure a little over 
12V.  A generator or alternator
needs to output a bit more than that--off the top of my head it's 
something like 13.8V--in order to
overcome the internal resistance of the battery to charge it.


bs


BJ8Healeys wrote:

>Hi, Ned -
>Yes, the light should go on when the ignition is turned on.  The power input
>side of the light is fed by the white wire from terminal 2 of the ignition
>switch.  Make sure the connection at the switch is clean and tight (it's the
>one with the two white wires going into one connector).  If your windshield
>wipers work, this connection is probably O.K.
>
>The other side of the light is the brown/yellow wire from terminal WL of the
>voltage regulator.   At terminal F of the voltage regulator is the larger
>brown/yellow wire from terminal D of the generator.  Make sure all of these
>connections are clean and tight.
>
>The light is turned on by the current caused by an imbalance of voltage
>between the power input on the white wire (12 volts) and the voltage sensed
>out of the generator on the brown/yellow wire.  When it's less than 12
>volts, the light comes on.  When the generator output reaches the full 12
>volts, the voltage on both sides of the light is equal, there is no current
>flow, and the light goes out.
>
>Steve Byers
>HBJ8L/36666
>BJ8 Registry
>Havelock, NC   USA
>
>
>
>-----Original Message-----
>From: owner-healeys@autox.team.net
>[mailto:owner-healeys@autox.team.net]On Behalf Of Ned Smith
>Sent: Friday, December 30, 2005 4:06 PM
>To: Austin-Healey List
>Subject: Generator Light
>
>
>I have cleaned up my instruments and reinstalled them with new O rings. The
>generator light on the tachometer doesn't seem to work. Should that light go
>on when the ignition is turned on?
>
>I engine is not startable right now.
>
>
>
>Ned Smith
>
>BJ8
>
>near Chattanooga, TN
>
>N34.98 W85.5




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