So we say: "Merry Christmas to all and to all Good Night" Congrats
on solving the longest running problem for MGs in 2004.
BOB
On Dec 22, 2004, at 5:49 PM, mark saperstein wrote:
Subject: re strange things F3 magna
dear all,
with heartfelt thanks to all those members who took the time to offer
very
wise help, here's the outcome of the "strange things" episode..
first, after allowing the battery to receive a good charging from a
float
charger for about 2 days, the ignition light working in reverse with
the
ignition switch fixed itself.
after testing all circuits for shorts and finding none, cleaning and
gapping the contact points on the cutout to no avail, pulling the
fascia and
assuring all connections are good and wires routed correctly,
verifying the
continuity and function of switches, etc.,etc. It was time to look
into the
dynamo. as the manual instructs, I moved the third brush to increase
output.. but got no change!! ??? So thought it best to check the
other
brushes as well. found them to be fairly "stuck" in their holders so
took them
out, cleaned them up with some electrical contact spray cleaner ( by
CMC ) and
replaced them. and assured that their springs were tensioned and free
to push
the brushes home to the commutator. ( they were pretty stiff as I
found them
). then I returned the third brush to its' original location.
Now, everything works ! dynamo produces 12 to 15 volts with good
revs and
ammeter shows +9 . and the cut-out opens and closes on time.
Regarding the 20 amp drain upon connecting the battery with the
ignition
switch "off" :
My best guess is that the battery , although in a very low state of
charge,
was connecting to the dynamo by reverse current through the ground
circuit (
"E" terminal in the fuse box and then to the dynamo "F" terminal )..
then back
through the ignition lamp....because the regulator points being open
would not
matter in that case.
Disclaimer: " but I ain't no 'lectrician "
( I probably will install the diode to replace the cutout someday..
just for
safety sake. )
the manuals all say that the state of battery charge has no bearing
on the
cutout behaviour .......but ?????
I hope there is some value to others in this, very best wishes for
the
holidays and the new year,
Mickey in phoenix
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