• 🔵 The Sound of Safety: A healthy electric brake coil requires at least 3 Amps of power per wheel. Every time you press the tow vehicle's brake pedal and CoilWatch detects this current flowing, the dash receiver rewards you with a reassuring vibrant blue LED and a quick audible chirp.
• 🤫 Silence is Your Warning: If a magnet fails or a wire snaps, the current drops to zero. When you hit the brakes, CoilWatch will stay completely dark and silent. You will know instantly and in real-time that your trailer brakes are not drawing power so you can pull over safely and investigate before an emergency happens.

• True Plug-and-Play Setup: Fits seamlessly between your vehicle's towing plug and your trailer wire lead.
• Zero Skills Required: No cutting into factory wiring harnesses, no complex tools, and no expensive auto-electrician bills.
• Instant Wireless Cabin Alerts: The compact receiver simply plugs directly into your center console’s 12V cigarette lighter socket.
• Real-Time Monitoring: Actively tracks electrical current from 0 Amps up to full braking capacity on every single brake application.

• Vehicle Interface: Universal inline connector (fits between towing vehicle plug and trailer lead).
• Receiver Interface: Standard 12V DC accessory/cigarette lighter socket.
• Alert Mechanism: High-visibility Blue LED light and an integrated audible buzzer.
• Measurement Threshold: Detects standard operational current draw (minimum 3 Amps per wheel coil). Fault state triggered at 0 Amps.
• Compatibility: Suitable for all caravans, camper trailers, horse floats, and boat trailers equipped with 12V electromagnetic drum brakes.

• 1x CoilWatch Inline Trailer Transmitter Module
• 1x CoilWatch Wireless 12V Visual & Audible Receiver
• 1x Easy-to-Follow Quick Start Guide

Prior to packaging each item will undergo testing, we want to make sure that upon delivery that the items are perfectly working and ready to be used.

MORE SPECIFICATIONS

• 12volt DC Main Unit & Receiver Unit
• Main Unit waterproof resistant (12pin/7pin)
• Receiver Unit is not waterproof (cigarette plug)
• L.E.D. Lights and Audible Buzzers

• Main Unit

                  - White L.E.D.  Power ON main unit

                  - Blue L.E.D.  Current Detected Electric Brakes

                  - BUZZER.  Sound when Current demand brakes

• Receiver Unit

                  - Red L.E.D.  Power On Receiver Unit

                  - White L.E.D.  Visual Alert Power ON main unit

                  - Blue L.E.D. Visual Alert Current detected brakes

                  - BUZZER. Audible Alert Current detected brakes

More on How It Works ?

Watch the Video or read below for details...

First you will notice there is a device that you connect between your towing vehicle and the trailer or caravan. With a plug on one end, socket on the other end, you can't get the connection wrong. Simple plug & play !

Secondly you will notice there is a device that you plug in to a conventional cigarette lighter socket normally found in most towing vehicles. Simply plug this in to the cigarette socket. 

Once you have connected and plugged in the units, this is where the magic happens.

Firstly, providing your cigarette lighter socket is working, when you turn on the ignition key and power goes to the cigarette lighter socket, you should see the Receiver Unit illuminate a Red L.E.D. This is to alert you that power is coming through the cigarette socket as expected.

Next turn on your side or driving lights switch on your towing vehicle. The reason for this is because the main unit

at the rear of your towing vehicle and the trailer / caravan requires power and this is where it gets the 12v electricity from. What should happen is another illumination a White L.E.D. should be seen on the receiver unit, but also if you look at the rear of your towing vehicle coupling, you should also see a White L.E.D illuminating on the main unit. Your trailer or caravan running lights (rear red, side amber, front white lights should be seen on). This shows you that the main unit is powered on and it is monitoring the current to the electric brake internal coils. Inside the towing vehicle the White L.E.D. is also to tell you in real time that the main unit is powered on and monitoring the current as said above. 

Whilst you are travelling this White L.E.D. also acts to let you know that the connection to the trailer or caravan is still ok, it is still providing power not only to the main unit but also to your tail lights. It will not tell you if your tail lights have blown. But if your travelling and the white L.E.D. stops illuminating, it could be a sign that the coupling plug has disconnected or a fuse has blown in the towing vehicle. (note: the main unit is extremely low power drawn and unlikely a cause to blow any fuses)

Finally.... Each time the electric brake internal coils are operated it draws current Amps through a blue wire that is monitored by the main unit which then transmits to the receiver inside the towing vehicle as well as illuminating a Blue L.E.D. on the main unit as well as sounding audible buzzer. Inside the towing vehicle the White L.E.D will stop illuminating whilst a Blue L.E.D. illuminates as well as a Audible buzzer sounds.  

So if you press the towing vehicle brake pedal or you press the Red Arc (or other electric brake controller) or you have installed a Electronic Sway Controller you will be notified in real time that current amps are going to your electric brake internal coils to apply braking.

This equipment is compatible with said equipment above because of how it monitors the electricity wires rather than connects in-between it. Its like having a set of eyes watching without needing to touch to see what's happeneing.

• Do I need an auto-electrician to install CoilWatch?
  • Not at all. CoilWatch is 100% plug-and-play. The main unit simply clicks inline between your towing vehicle's plug and your trailer wire lead. The receiver pops straight into your dashboard’s 12V cigarette lighter socket. No tools, no wire cutting, and zero technical skills are required.
• Will this replace my existing brake controller?
  • No. CoilWatch is a dedicated safety monitor, not a brake controller. It works alongside your existing in-car or trailer-mounted brake controller (like a Redarc or Tekonsha) to actively verify that the electric signals are successfully reaching your trailer’s brake coils.

• Why does it chirp every time I brake? Isn't that annoying?
  • We designed CoilWatch based on "positive reassurance." The quick chirp and blue light are engineered to be a subtle, comforting confirmation that your brakes are working perfectly. Rather than screaming at you with a loud alarm when something goes wrong, CoilWatch simply goes dark and silent if it detects zero current. Experienced towers love this because silence instantly tells you there is a problem without adding panic to a stressful driving situation.
• How does it know if my brakes are actually working?
  • Most basic monitors only check if the plastic 7/12-pin trailer plug is physically connected to the car. CoilWatch is completely different. It measures the actual electrical amperage flowing down the line. A healthy trailer brake coil requires at least 3 Amps of power per wheel to engage. If CoilWatch detects current flowing above 1 Amp, it triggers the green-light safety response.
• What does it mean if I press the brakes and the receiver stays silent and dark?
  • This means your trailer brakes are drawing zero current and are not working. It indicates a fault that requires immediate investigation—such as a broken wire inside the trailer brake drum, a failed electromagnetic coil at the wheel, or a severely corrupted trailer plug connection.

• Will CoilWatch work with my specific caravan or trailer?
  • Yes, as long as your caravan, camper trailer, horse float, or boat trailer utilizes standard 12V electromagnetic drum brakes. It is universally compatible with all major trailer plug wiring setups.
• Does the wireless receiver require batteries?
  • No. The receiver is powered continuously by your vehicle’s 12V accessory/cigarette lighter socket, so you never have to worry about dead batteries on a long road trip.
• Can I use CoilWatch on multiple vehicles?
  • Absolutely. Because it requires no permanent wiring or installation, you can easily swap the entire CoilWatch system between different tow vehicles or trailers in under 60 seconds.

NOTE

^Works with both single and dual axel trailers and caravan electric brakes. 

*Simply choose the correct plug type, Providing three of the most common plug type connections. 

** Wireless within suitable range for you to connect the main unit connected at the rear of your vehicle and trailer/caravan and the receiver unit that is plugged in to the cigarette socket in the vehicle console. The wireless part is the communication between the main unit and the receiver unit but both still need to be powered as described.

^^ Receiver unit is not water proof however the main unit that is connected outside at the rear of the vehicle and trailer/caravan is water resistant from the weather, however it is not intended to be submersed in water and should be avoided.  See warranty for more information. Pictures for illustration purposes only, product may from time to time have improvements and may look different from what is shown here. We will however provide pictures on the sales page of the exact product you are purchasing.

Everything supplied has a 12 months limited warranty. Return postage and packaging for warranty claims are at the expense to the buyer as explained in the terms and conditions and sale on the product website.

please contact us for purchase details. 

We may be able to provide extra features if you contact us to discuss and work out the additional costings.