On Wed, 11 Dec 2013 13:12:37 -0500, Stormin Mormon wrote:

Normally a half hour diagnosis and
fix. To reassemble the copier and reset all the
timing gears took several days.

A *lot* of things get fixed, simply by throwing parts at
the problem. Nothing wrong with that. Sometimes the person
throwing the parts actually knows what they're doing; sometimes
not.

Take the oft-cited case of vibration when braking? Must be "warp",
right? The rotors must be warped like a potato chip. Solution?
Replace (or turn) the rotors. Right? Everyone knows this, right?

When *I* had vibration while braking, I tried to measure this
so-called "warp". You can't measure it on the car (that would
be runout), so, I measured it off the car. Hmmmm.... there was
no warp. Huh?

Turns out, for normal people (not racing braking systems), warp
just doesn't really happen. While a ton of suspension components
can cause vibration at various speeds, the classic brake-related
vibration at speed is caused, usually, by disk thickness variation
caused, most often, by braking deposits, building up over time.

The solution, once you *understand* that, is to change your
braking habits (so as not to build up those deposits).

Yet, if you don't bother to understand what causes the vibration,
and you simply replace the rotors, you'll solve the problem
quickly, but it will eventually return. And, most importantly,
you'll be solving the problem without understanding the cause,
which means you'll think your entire life that your rotors
are warping. You might even vainly try to buy beefier rotors
in the hope that they won't "warp" as much. Which means you'll
be solving the problem with the right solution but for the wrong
reasons.

Anyway, same thing with just jumping the red wire to the white
wire. If I didn't understand first what the red wire was supposed
to do, and what voltage it was supposed to have, and what effect
it was supposed to have on the furnace, etc., then I would be
remiss.

Of course, had I just disassembled everything and reassembled
it, in this case, I would have solved the problem sooner, as
now it's all working after I disconnected *every* wire, and
reconnected them after cleaning them. I also tapped ever solenoid
and relay I could find and blew the whole thing out with
compressed air.

At the moment, it's working! Thanks to everyone! I very
much appreciate the help.

http://farm6.staticflickr.com/5525/1...e7fcbdf4_o.gif