[AT] Tractor lighting puzzler--slightly amazing!

John Wilkens jwilkens at eoni.com
Mon Nov 8 01:00:40 PST 2004


Doug, your detailed explanation got through to me after reading the second 
part of your paragraph about six times!   I feel like an almost complete 
person again!   Thanks!!  Think I'll file this away hard copy in case my 
memory does what it usually does lately.      John



At 10:55 PM 11/07/2004, you wrote:
>At 05:57 PM 11/7/04 -0800, you wrote:
> >Trying to understand Doug.  Would that explain why both poorly grounded
> >lights with separate circuits from the switch turned on dim when only one
> >circuit was switched on at the switch??   IE:  One light working OK (as
> >switched) on the good fender but both lights dim at the same time on the
> >bad fender.    John
> >
> >
> >
>It would be easier if I could draw a picture on this email. The rt and left
>lights from each fender are most likely bussed together at the switch for
>high and low beam. The switch is only controlling the positive side. Let's
>say the electrons left the switch on the low beam post feeding 2 wires. The
>electrons going to the good fender went through the bulb and easily found
>their way back to the battery through the good ground. The light lights
>bright. The electrons going to the bad fender got through the bulb and
>didn't have an easy path back to the battery so they had to find another
>route. They found their way through the grd of the high beam and went out
>through the positive side back through the high side buss at the switch and
>out to the good fender where it went through high beam lamp filament to
>ground and back to the battery. If you had looked close the off filament on
>the good side was probably glowing too. The lights were dim because the
>voltage was feeding 3 lamps instead of 1. In the simple series circuit like
>this the amount of current available to each bulb would have been equal so
>they werre operating on 1/3 capacity. Clear as mud????
>
>
>
>            Doug Tallman
>            dtallman at accnorwalk.com
>            VGTCOA Ohio Regional Director
>                Greenwich, OH USA
>
>_______________________________________________
>AT mailing list
>http://www.antique-tractor.com/mailman/listinfo/at


                    In the wide-open spaces of NE Oregon
   





More information about the AT mailing list