Jim Cathey wrote:
Not sure but the load (resistance) of the thing being timed MIGHT
influence the time. When the load of the turn signals is halved, they
flash twice as fast (and that's controlled by the combination relay
timer).
With no other evidence than a vague idea of what the circuitry
might be inside the relay, I don't believe that this is going
to be a problem. It takes extra circuitry to make the flasher
be load-sensitive (as opposed to the ancient thermal flashers
that predate the electronic ones). To permanently disable the
timer would probably require no more than shorting a capacitor
inside the timer module, but again I have no factual basis for
this belief. This may or may not be something that could be
done by our interested party anyway.
My desire was to work out a simple hack to the relay that would
disable the timer if the engagement switch were actuated and held
on for a period of time, thus allowing for normal and abnormal
use via the same system. In an SL (my target) selecting between
the glass heater and something else is easy and obvious, by way
of selective plugging in of various appliances. Would be different
for any other vehicle.
Most of the timer circuits I've seen in '70s-'80s (even electronic ones)
set the interval using the value of a resistor and capacitor - and when
the resistance doubles (as it does when a light goes out) the time
constant changes by the same amount.
Marshall
--
Marshall Booth (who doesn't respond to unsigned questions)
"der Dieseling Doktor" [EMAIL PROTECTED]
'87 300TD 182Kmi, '84 190D 2.2 229Kmi, '85 190D 2.0 161Kmi, '87 190D 2.5
turbo 237kmi
