On Wed, 27 Jun 2007 22:02:17 +1000, Nick Bourne wrote:
>Hachiroku ???? wrote:
>> On Wed, 27 Jun 2007 14:19:40 +1000, Nick Bourne wrote:



>>> If it is a factory fit then in the wiring harness there will be wires that
>>> run from the drivers side to the passenger side that splice into the
>>> up/down wires. If they are aftermarket it may not be connected at
>>> all(seems that way by the wiring you suggested), but if it is there will
>>> be a splice into the up/down wires somewhere along the line. The extra
>>> blue wire is most likely meant to be hooked up to the dash light circuit
>>> to make the switch light up.
>>>
>>> FYI the switches work by earthing out both up/down wires then when you
>>> push the switch it disconnects the earth from one wire and connects it to
>>> power. In a master-slave situation the slave switch up/down wires are
>>> earthed back to the master switch so that when the master switch is
>>> working it sends the power through the slave switch then to the motor.
>>>
>>>
>>> Power Power
>>> _____________ | __________________ |
>>> / \ | / \ |
>>> Motor Slave Master___ Earth
>>> \______________/ | \__________________/ |
>>> | |
>>> Light Light
>>
>>
>> Nice drawing! Makes it clearer. I'll check it out later if it doesn't hit
>> over 100 degrees again today...if not, Friday is supposed to be in the
>> mid-70's (makes working outside SO much nicer!)

One note - the slave switch is supposed to put both lines through to
the traveler wires to the Master switch except when it's being thrown,
so the master switch can run the window. If you have a "Window War"
between the passenger and driver the slave switch will win, because
it's closer to the motor.

>> Earth, eh? In 1976 I had a Volvo 1800ES 'estate wagon', based on the
>> p1800E sports car. Cool little wagon.
>>
>> The Tach said "Smiths" above the needle mount and "Negative Earth" below
>> it. It wasn't until a couple years later when I went to Electronics school
>> that it finally hit me it meant Negative GROUND!
>>
>> But I thought it was so cool that we named our band Negative Earth...
>
>Sorry I come from the criminal colonies were the British taught us to
>speak. I think it comes from the original DC power grid where you got
>one wire in and 6 foot steel rod driven into the earth out the back. I
>can't get my head around the whole AC wiring thing of active and
>neutral. If you touch either it give you a shock, can't see what's so
>neutral about it.

If it's built right, over here they bond the neutral wires and the
safety earth ground wires at the power service panel on the house.
Sometimes it's all one large bussbar in the service panel.

You can't get shocked on the neutral IF it's properly connected,
there's maybe two to five volts there above ground, due to wire
resistance.

Now if you open the neutral wire and still have a load connected at
the far end, the 120V or 240V power coming back through the neutral
trying to find it's way back to the panel is there to bite you...

Over there in Oz, all bets are off. There are many ways to wire up
power systems that have no earthed conductors, and there are people
who claim leaving it floating is safer... (And I am not one of them.)

--<< Bruce >>--