Trinary switch question

[A.J. Schreder]

In the picture below, one of the black/green wires on the trinary switch is supposed to be connected to the AC thermostat. The other to the ac compressor clutch. The black wires on my trinary switch are identical and don't appear to have any differentiation. Is it arbitrary? Same for the blue wires on the trinary. They're identical, but one goes to ground, the other to the fan relay.

It seems straightforward but common sense says there's no way it doesn't matter which wire goes to either connection.

A.J.

 

[PeteB]

The switch just closes the circuits, so it really doesn't matter.

 

[Eric McClellan]

Yiu can watch my wiring video on YouTube.

 

[Howard Jones]

Pete is correct.

 

[Allan]

The blue wires do not get used, the fan circuit is controlled by Infinitybox.

 

[Bill]

Here is a diagram of the Trinary switch internals. It does matter which set of terminals are connected to fan vs compressor clutch. Each internal switch closes/opens at a different refrigerant pressure.

 

[A.J. Schreder]

The other blue wire coming out of the trinary switch (on the right side in Bill's picture above) goes to the fan relay. But that's essentially ground, right? The picture I originally posted shows the white wire coming out of the fan relay, going to the "optional adjustable fan in radiator thermostat switch", then continuing to ground. But we don't have that optional switch, right? So my white wire goes straight to ground. Does that mean the blue wire also goes straight to ground? And if that's the case, why can't it go to the same ground as the other blue wire from the trinary switch? Which would save having it go through the footbox.

Thanks for all the help.

A.J.

 

[PeteB]

Why are you using the white wire?

 

[Nick]

Here is a diagram of the Trinary switch internals. It does matter which set of terminals are connected to fan vs compressor clutch. Each internal switch closes/opens at a different refrigerant pressure.

My fan relay on my GT40 is in a very difficult place to get to I take it the wire to the fan control relay diagram conects to the relay output wire to operate the fans. So could I run a fused wired from the fan input wire instead.

Also, what does this connection actually do.

 

[A.J. Schreder]

Why are you using the white wire?

The white wire is already coming out of the relay. It came with the Vintage Air like that. If no optional switch, it goes to ground, right? Are you suggesting I replace the white wire at the relay with the blue wire from the trinary switch?

A.J.

 

[Nick]

My fan relay on my GT40 is in a very difficult place to get to I take it the wire to the fan control relay diagram conects to the relay output wire to operate the fans. So could I run a fused wired from the fan input wire instead.

Also, what does this connection actually do.

I need to clarify a bit as this is the trinary switch wiring I have so if I cannot conect to the relay can I splice the 2 wires in somewhere else and if so where.

 

[PeteB]

The white wire in the VA harness is the power relay, not the fan relay: http://www.vintageair.com/Instructi...bsite)/Universal Vacuum HC Wiring Diagram.pdf

Assuming you are using the ISIS fan wires, the ISIS system applies power to the tan wire (Fan 2, output 10) from the front powercell when the A/C is on, so there's no need for a separate fan relay or to use the blue wires from the trinary switch.

 

[A.J. Schreder]

Got it. Thanks Pete. And Alan....I see you answered my last question even before I answered it.

A.J.

 

[Kenneth Rowell]

Whoa... ok so there is only one line from the AC clutch... does the tan ISIS wire from rear power cell connect to it or does the trinary black/green wire run back to it?

 

[PeteB]

Whoa... ok so there is only one line from the AC clutch... does the tan ISIS wire from rear power cell connect to it or does the trinary black/green wire run back to it?

Trinary switch connects to the white/black wire on the Mastercell. Tan wire on the rear power cell goes to the A/C clutch.