Cableado del interruptor de presión con relé integrado de 40 amperios
Cablear el interruptor de presión no es demasiado difícil, pero puede resultar confuso. En este artículo, revisaremos cómo cablear nuestros interruptores de presión y las mejores prácticas para hacerlo.
Rojo: alimentación positiva de +12 V proveniente de la batería — se conecta mediante el portafusibles en línea
Azul: activación positiva de +12 V — alimentación activada por la llave para que la unidad no pueda funcionar cuando el vehículo esté apagado
Blanco: se conecta al cable rojo que sale del compresor
Negro: conexión a tierra del chasis del vehículo
Descripción general
Trabajarás con este tipo de interruptor de presión. Si tienes nuestro modelo tipo tapa de botella, consulta el artículo aquí.
Primeros pasos
En este punto, probablemente hayas notado que del interruptor de presión salen cuatro cables. Actualmente tienes un cable rojo, uno blanco, uno azul y uno negro que salen de esta unidad. Cada cable tiene su propia función, que se puede desglosar en la siguiente lista:
1
Conoce cada cable
Red — +12v Positive power from the battery. This wire will connect to the battery with the in-line fuse holder.
Blue — +12v Positive trigger source. When +12v is supplied to this wire, the pressure switch turns on and the compressor will run. This wire is run to a key-power-on source so that the unit cannot operate when the vehicle is off.
White — This wire gets connected to the red wire coming off the compressor.
Black — Connected to the vehicle frame as a ground connection.
Red Wire — Battery Power
This wire pulls power from the battery directly and supplies it to the compressor. For this connection, it is ESSENTIAL that you use the supplied red wire with your kit or an equivalent 10awg wire.
Please note: If you need to extend this run longer than 22 feet, we recommend using an 8AWG wire or larger.
2
Prepare the fuse holder
Start by locating your fuse holder in the baggy containing your electrical components. The fuse-holder is sent to you in a loop. Do not install a fuse into the holder yet.
Go ahead and cut the fuse holder in the center to make two ends. You can cut the wire where the dashed line is in the picture above.
Cut the fuse-holder loop at the center before wiring.
3
Strip both ends
Using a set of wire strippers, strip each end of the holder and expose the copper leads. Each end should now look like this:
Both fuse-holder ends stripped and ready for connectors.
4
Crimp ring and butt connectors
At this point, you will use the supplied ring terminal crimp connector on one side of this fuse holder. The opposite end will accept one of the yellow butt connectors included with the electrical connectors. The two connectors are pictured below.
The ring terminal connector can be used to connect the fuse holder to your positive battery terminal. The yellow butt connector will allow you to connect the fuse holder to our red wire, and complete the connection back to the pressure switch. Go ahead and strip one end of the supplied red wire, and connect it into the opposite end of the yellow butt connector. Route your red wire from the fuse holder back to the pressure switch. Do not cut your red wire until you have finished routing it back to the pressure switch. You want to make sure you don't cut it too short.
Ring terminal for the battery; yellow butt for the red run.
5
Connect red to the pressure switch
Once the red wire has been routed back to the pressure switch, you can cut off any excess wire while still leaving a small amount of slack. Locate the neon green terminal connector in your electrical kit.
This connector will allow you to connect the lead from the battery up to the red wire on the pressure switch. Strip the end of the red wire you intend to use for the pressure switch and crimp this connector onto the wire. At this point, you may connect this terminal to the red wire on the pressure switch. You have completed the connection for the red wire.
Neon green terminal joins the battery lead to the switch red wire.
Blue Wire — Key-On Trigger
This is where most of the confusion happens with a new install. This blue wire on our pressure switch serves as a signal wire for the pressure switch. If no power is present at this wire, the pressure switch will not allow the compressor to run. You will connect this blue wire to a key-power-on source on the vehicle so that the compressor can only run when the vehicle is on. If you connect this wire to the battery, the compressor could run overnight and drain your battery.
6
Attach the blue/grey trigger lead
Start by locating the supplied roll of blue or grey wire (doesn't matter which you use). Included with your connectors is a small connector that looks like this:
Go ahead and strip one end of your grey/blue wire. Crimp this connector onto the stripped end of the wire, and connect this piece into the blue wire on the pressure switch.
Small connector for the blue pressure-switch trigger lead.
7
Tap a key-on power source
From there, you will need to locate a good power source for this wire. This will differ from vehicle to vehicle. You will want to locate an accessory power wire that is only powered when the vehicle is on. If you need help locating a good source we recommend checking google for wiring schematics for your vehicle.
Below is a list of common sources that typically only come on when the key comes on. Tapping into the power wire on any of these sources using the provided red T-tap in the wiring kit, will give you the positive key power on you need for the system to only run when the vehicle is on.
Radio
Amplifier (if applicable)
USB Power Outlet
Cigarette Lighter
Daytime Running Lights
Trailer Lights
Heated Seat(s)
Sunroof
Power Windows
T-tap the key-on wire and the new trigger lead.
White & Black Wires
8
White to compressor red
The white wire on your pressure switch is the easiest one to complete other than the ground. Go ahead and connect the white wire directly to the red wire on the compressor. You don't need to do anything else here.
9
Black to bare-metal ground
The black wire can be routed over the frame of the vehicle as a ground. We recommend using a wire brush on the desired ground point to remove any paint/finish materials that may inhibit the connection to the metal frame. If you do not remove the paint, your ground may not work properly. The ground must be connected to BARE METAL. You can use a self-tapping 5/16" screw (or similar size) to secure the ground connection. Once connected and secured, you can now test the pressure switch to ensure everything functions as intended.
Testing The Pressure Switch
10
Install the fuse and verify fill
Locate one of the 35A fuses that came with your electrical connectors. These fuses will look like the following:
Open up the fuse holder by pulling back on the red cover. Insert one of these fuses into the holder by simply pressing it into place. There may be some resistance, this is normal. Once the fuse has been inserted, turn the vehicle on and listen for the air compressor. It should start filling your air tank once the vehicle starts.
Use a 35A fuse in the holder for the battery power run.
Siguiente
Este artículo ofrece una guía clara y paso a paso para conectar un presostato independiente a un relé de 40 amperios para operar el compresor de forma segura. Explica las funciones de los pines del relé, las conexiones del presostato, la instalación del fusible, la obtención de alimentación con el encendido activado y las comprobaciones finales del cableado para garantizar que el compresor solo funcione cuando el vehículo esté encendido.
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