Not being the master electrician and looking for a simple solution, I am
guessing the switch and light is on the hot side. What if the motor were
isolated from ground (which it may or may not be) and the switch was run on
the ground side, with the light downstream of the switch? The motor would
have a hot feed, but only grounded when the switch was on. The generation
by the fan would then be "cut off" by the switch and not illuminate the
phantom light.
Am I correct here or merely driving through suburbia in Outer Mongolia?
Ed
-----Original Message-----
From: Randall [mailto:randallyoung@earthlink.net]
Sent: Monday, August 27, 2001 5:01 PM
Cc: autoX-Trumph List
Subject: Re: tr6 electric fan conversion
I'm still a bit muzzy from the drive back from Breckenridge, but I think
the answer is "Yes, but ...". Since the voltage generated by the fan
motor is the same polarity as the voltage to drive it, the diode would
have to go between the motor and the relay (or between the motor and
ground). Either way, the diode will reduce the voltage available to the
motor, reducing it's cooling effectiveness. The diode will also have to
be beefy enough to handle the motor starting current, and whatever
transients it can generate.
Either rewiring the lamp, or living with the 'feature' seems preferable
to me. Another option _might_ be to use a higher-current bulb, that
would not glow brightly enough to be seen on the output of the fan
motor.
Randall
"F. Grant Robertson" wrote:
>
> wouldn't a properly placed diode solve all this mess?
>
> -fgr
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