[AT] Tractor lighting puzzler

[Robert L. Holtzer]

John, it sounds like the light filaments were going to ground through one 
of the filament circuits -- putting the filaments in series resulting in 
dim light.

I will have to check the light switch on my TO-35 to see how it switches -- 
lights aren't installed presently.  I don't recall hearing of having high 
and low filaments on at the same time -- is this a tractor thing?  Maybe 
someone on the list can comment.

Bob Holtzer

At 01:22 PM 11/7/2004 -0800, you wrote:
>This is a good one.  I installed two new low beam and two new high beam 
>headlights on my MF 175--one each on each fender.  The low beams and high 
>beams each had their separate wiring to the light switch.  They are wired 
>so in switch position 1 only the low beams come on; in switch position 2 
>both high and low beams come on, and in switch position 3 only the high 
>beams come on.  The first time I tried them the lights on the right fender 
>worked according to plan, but in ALL switch positions the lights on the 
>left fender BOTH came on VERY dim--together.  Obviously the right fender 
>was not grounded good enough so I added a ground wire from tractor frame 
>to the fender--which cleared up the problem..       The puzzler to me 
>is--before I grounded the right fender why did BOTH lights on the right 
>fender come on (very dim) even with the switch energizing only one circuit 
>(high or low beam)??????????????        Electricity always has been a 
>"challenge" to this old guy!    John
>
>                    In the wide-open spaces of NE Oregon
>
>
>
>_______________________________________________
>AT mailing list
>http://www.antique-tractor.com/mailman/listinfo/at