Vintage Air Trinary Switch Wiring Diagram

If you’re looking for a vintage air trinary switch wiring diagram, you’re in the right place. In this article, we’ll guide you through everything you need to know about wiring your vintage air trinary switch, including what it is, how it works, and how to wire it correctly. But before we dive into the details, let’s start with the basics.

What is a Vintage Air Trinary Switch?

A vintage air trinary switch is a type of switch that controls the operation of the air conditioning system in a classic car. It’s called a “trinary” switch because it has three functions: it detects pressure in the system, it turns the compressor on and off, and it turns the electric radiator fan on and off. The switch is designed to protect the system from damage by preventing the compressor from coming on when the pressure is too low or too high, and by turning on the fan when the pressure is too high.

The switch is usually located on the receiver/drier or on the evaporator, depending on the system design. It’s a popular choice among classic car enthusiasts because it’s easy to install and offers reliable performance.

How Does a Vintage Air Trinary Switch Work?

A vintage air trinary switch works by sensing the pressure in the air conditioning system and sending a signal to the compressor and the fan. When the pressure is low, the switch prevents the compressor from turning on to avoid damage to the system. When the pressure is high, the switch turns on the fan to cool down the system and prevent damage from overheating.

The switch has three terminals: A, B, and C. Terminal A is connected to the compressor clutch, terminal B is connected to the electric radiator fan, and terminal C is connected to the pressure sensor. The switch is designed to work with a 12-volt system and can handle up to 30 amps of current.

How to Wire a Vintage Air Trinary Switch

Wiring a vintage air trinary switch is a relatively simple process, but it’s important to follow the manufacturer’s instructions carefully. Here’s a basic wiring diagram for a vintage air trinary switch:

Terminal Wire Color Function
A Green Compressor clutch
B Blue Electric radiator fan
C Orange Pressure sensor

To wire the switch, you’ll need to connect each terminal to the correct wire using wire crimps or solder. Here’s how to do it:

Step 1: Connect Terminal A to the Compressor Clutch

Connect the green wire to terminal A on the switch. Then, connect the other end of the green wire to the compressor clutch using a wire crimp or solder.

Step 2: Connect Terminal B to the Electric Radiator Fan

Connect the blue wire to terminal B on the switch. Then, connect the other end of the blue wire to the electric radiator fan using a wire crimp or solder.

Step 3: Connect Terminal C to the Pressure Sensor

Connect the orange wire to terminal C on the switch. Then, connect the other end of the orange wire to the pressure sensor using a wire crimp or solder.

Make sure all connections are secure and free of any loose wires. Once everything is connected, turn on the ignition and test the system to make sure the switch is working properly.

FAQ

Q: What happens if the pressure is too low?

A: If the pressure is too low, the switch prevents the compressor from turning on to avoid damage to the system. This is called the “low pressure” function of the switch.

Q: What happens if the pressure is too high?

A: If the pressure is too high, the switch turns on the electric radiator fan to cool down the system and prevent damage from overheating. This is called the “high pressure” function of the switch.

Q: Can I install a vintage air trinary switch on my own?

A: Yes, you can install a vintage air trinary switch on your own if you have basic knowledge of electrical wiring and follow the manufacturer’s instructions carefully. If you’re not comfortable working with electrical wiring, it’s best to have a professional do the installation for you.

Q: How do I know if my vintage air trinary switch is working properly?

A: To test your vintage air trinary switch, turn on the ignition and check to see if the compressor and fan turn on when the pressure is within the normal range. If the switch is functioning properly, the compressor and fan should turn on and off smoothly.

Q: Can I use a vintage air trinary switch with any air conditioning system?

A: No, a vintage air trinary switch is designed to work specifically with vintage air conditioning systems. If you’re not sure if your system is compatible with a trinary switch, check with the manufacturer or consult with a professional.

Conclusion

Wiring a vintage air trinary switch is a straightforward process that can be done on your own if you have the right tools and follow the instructions carefully. By understanding how the switch works and how to wire it correctly, you can ensure that your classic car’s air conditioning system operates smoothly and efficiently.