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Whistle button causes train to cycle direction, not blow whistle

QUOTE: Originally posted by driver8

Griss, (and all..!)

i received some excellent advice on the forum regarding basically same
question, except my horn equipped Williams wouldn't honk, but all my postwar stuff (2037 and 2023 loco's) blew fine. it was advised to do the same.
replace the rectifier, in my case my transormer is a Lionel LW.
all i did was consult Greenbergs for the layout of wiring, (as was
provided to you for your transformer via Olsens excellent site)
follow wire from button, unsolder at that connection, (provided your
wire is in good shape) solder that wire to end of your new 6 amp rectifier diode.
consult your schematic, for description of color of wire that will
be coming off of the other side of your original rectifier, unsolder.
then solder that end of wire to other end of new diode, tape your exposed connections and place it neatly in the frame, and Your'e done !
i did not even remove my old one.
Radio Shack will give you what you need.. 6 amp rectifier diodes, i got a pack
of 4, for like $2.00 + change..
O.K. now MY problem... the Williams is blowin' Great,
but my POST WAR stuff now is sporadic,-e-units & horns !!!!!!!!!!!! crazy,,
was originally concerned with polarity of the new diode, tested it before soldering, with the Williams loco, however,..... NOT the post war stuff.!!!!!
Will changing polarity do it guys?
Griss, hope my description was beneficial, and not confusing.
There is a HUGE amount of help from GOOD people here.

don't go off the rails like a "CRAZY TRAIN !!!"....- [Ozzy Osbourne]

driver8
on the BNSF mainline