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Date:         Fri, 24 Nov 2017 17:25:42 -0800
Reply-To:     Bill MacLachlan <billmacla@GMAIL.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Bill MacLachlan <billmacla@GMAIL.COM>
Subject:      Re: courtesy light flickering 89 westy
Comments: To: Dennis Haynes <d23haynes57@hotmail.com>
In-Reply-To:  <CY4PR20MB130321FD65C8AF134D417209A0260@CY4PR20MB1303.namprd20.prod.outlook.com>
Content-Type: text/plain; charset="UTF-8"

Thanks a bunch Dennis. I'll clean up the drivers door contacts first so no current can get through unless the door is open. I don't understand the excessive voltage drop part, so I will hope the door contacts are the cause!

Thanks again. Bill M

On Fri, Nov 24, 2017 at 7:59 AM, Dennis Haynes <d23haynes57@hotmail.com> wrote:

> Since LEDs draw so little power and can make some light with little > current available stray voltages can cause this effect. > > The courtesy light is a very simple circuit. Power from the battery is > there all the time and the switching circuit is done by opening or closing > the ground path. At the light switch, center is off. To one side the light > the ground is completed at the case and the light comes on. To the other > direction the ground is done through wiring to the door switches. At the > drivers door there is a double contact switch/ground for the light and the > key in ignition reminder chime. It is this ground where there is likely the > first problem, why you see the light. The next problem is that the reason > the leakage ground is causing the light is probably excessive voltage drop > in the system. So what is happening is that system drop is enough that the > LED is trying support some of the load through the back fed ground. > > > > Dennis > > > > > > Sent from Mail <https://go.microsoft.com/fwlink/?LinkId=550986> for > Windows 10 > > > ------------------------------ > *From:* Vanagon Mailing List <vanagon@gerry.vanagon.com> on behalf of > Bill MacLachlan <billmacla@GMAIL.COM> > *Sent:* Thursday, November 23, 2017 2:51:23 PM > *To:* vanagon@GERRY.VANAGON.COM > *Subject:* courtesy light flickering 89 westy > > Hi all > I noticed last night that the drivers side courtesy light - even though > turned off- was flickering in time with the turn signal. As well, there is > a faint glow in the light when the headlights are turned on. > Before I dive into the wiring diagram, or contort myself under the > dashboard, has anyone else dealt with this, and if so what was the > cause/fix? > > I have an LED bulb in the courtesy light. > > Thanks all. > > Bill M > 89 westy >


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