Mystery Switch

[Zpenman]

Does anyone know what this is? It looks like a thermal switch (due to the potting) but I'm just guessing and couldn't find it on a schematic. Switch was located just below the emergency flasher relay on the RH side of the passenger kick-panel of my '71. Ran across it while troubleshooting my rear window defroster. Thanks!

[Zed Head]

Is there measurable resistance or is it open or closed circuit?  Looks like both wires are the same color scheme and have the same connector, meaning no polarity.

How about a switch in the AC system?  Air temperature.

[Zpenman]

The switch is reading open. There's no A/C on the car. I can manually trace the wires but wanted to avoid creating a mess. Looks like a factory install, but can't be sure.

[SteveJ]

My guess - Key in buzzer. Ignore this drawing.

What are the wire colors where it was plugged into?

 

I missed "right hand" in the original post.

Now I'm thinking something to do with the kick-down solenoid in the autotragic transmission cars. They are wired with green wire.

 

Edited February 10 by SteveJ

[Zed Head]

The inhibitor switch also has two green wires. Edit - but it's a four wire switch.  The seat belt switch has two greens also.

Is it magnetic?  What would be the actuating mechanism of the switch, if it's a switch.  That was one of my thoughts in sugesting a low temperature switch, like AC or heat.

You could put in the freezer, and run hot air over it, and see if it closes in either case.

 

 

Edited February 10 by Zed Head

[SteveJ]

From the parts manual:

It is for autotragic transmission cars, as I guessed before.

If the car has been converted to a manual, this thread is complete.

[Zed Head]

So it is a temperature switch.  Wonder what it's protecting?  Is there a high temperature warning light on the automatic 240Z's?

It is odd though that the drawing seems to show it in the cabin on the passenger side.  A "thermo switch" used, apparently, only on the automatic cars.

p.s. as far as the thread being complete, the question was "what is it" not do I need it.  The puzzle is still open!

https://www.carpartsmanual.com/datsun/Z-1969-1978/electrical/electric-unit-switch/section-1/240z-260z

Edited February 10 by Zed Head

[Zed Head]

Looks like it is the first attempt to control the second set of points in the distributor.  Maybe it is close to the coolant hoses?

Another oddity.  From the 1973 wiring diagram.  Unable to post images again.  Something about the shape or size.  Who knows.  It's over by the distributor on the left side of the diagram.  Controls the relay that switches the points to give more advance.  Emissions.

 

[Zed Head]

It's in the Engine Tuneup chapter also.  Still can't paste an image.  Page ET-21.

[SteveJ]

18 minutes ago, Zed Head said:

Looks like it is the first attempt to control the second set of points in the distributor.  Maybe it is close to the coolant hoses?

Another oddity.  From the 1973 wiring diagram.  Unable to post images again.  Something about the shape or size.  Who knows.  It's over by the distributor on the left side of the diagram.  Controls the relay that switches the points to give more advance.  Emissions.

 

 

 

 

Nope. The switch for the points is on the thermostat.

[Zed Head]

Could be.  Let's see some evidence.  Don't forget, it's automatic transmission only.  The manual 240Z's didn't get the dual points.  According to the FSM.

[Zed Head]

This is why the pictures would have helped.  I doubt that they used "passenger room" when they were thinking of the coolant in the engine cooling system.

It was a fun puzzle though.