Redarc Tow-Pro Elite User manual

Electric Trailer Brake Controller
12 or 24Volt, 1 to 3 Axles
PROPORTIONAL
with ACTIVE CALIBRATION
Elite

1
WARNINGS & SAFETY INSTRUCTIONS
SAVE THESE INSTRUCTIONS - THIS MANUAL CONTAINS IMPORTANT SAFETY
INSTRUCTIONS FOR THE TOW-PRO®ELITE BRAKE CONTROLLER.
DO NOT OPERATE THE CONTROLLER UNLESS YOU HAVE READ AND UNDERSTOOD
THIS MANUAL AND THE CONTROLLER IS INSTALLED AS PER THESE INSTALLATION
INSTRUCTIONS.
ENSURE THAT YOUR TRAILER BRAKES ARE INSTALLED AND ARE OPERATING CORRECTLY:
IMPROPERLY INSTALLED AND/OR FAULTY TRAILER BRAKES CAN CAUSE ERRATIC
VEHICLE OR TRAILER BEHAVIOUR WITH THE POTENTIAL TO CAUSE A ROAD ACCIDENT.
FOR THIS REASON, IT IS OF UTMOST IMPORTANCE THAT YOUR TRAILER BRAKING
SYSTEM BE INSTALLED/MAINTAINED BY A QUALIFIED INSTALLER.
ALWAYS CHECK BRAKES AT LOW SPEED EACH TIME A TRAILER IS ATTACHED TO YOUR
VEHICLE.
1. Ensure that the Tow-Pro®Elite is mounted securely in a fixed location. Failure to mount securely
will result in inaccurate braking force measurements and incorrect braking of the trailer.
2. Ensure that the Tow-Pro®Elite is installed inside the vehicle cabin and away from any
environmental conditions that may cause damage, including engine heat, submersion in water,
salt spray and humidity. Exposure to these conditions may cause damage to the unit’s circuitry
and may cause erratic trailer braking.
3. A Fuse or Circuit Breaker of appropriate rating must be installed to protect the vehicle system.
Please refer to the installation instructions starting on Page 7 for specific instructions on where
to install the Fuse or Circuit Breaker and for appropriate Fuse or Circuit Breaker rating. The Fuse
or Circuit Breaker must be installed as close as possible to the battery.
TOW-PRO® ELITE (EBRH-ACCV3-NA) TRAILER BRAKE CONTROLLER
The Tow-Pro®Elite is an electric trailer brake controller designed to suit most common
trailer braking applications whilst requiring minimal dash space and being simple to
install and operate.
The Tow-Pro®Elite offers selectable Proportional or User Controlled trailer braking
modes allowing the user to choose the braking style depending on the road or terrain
conditions, vehicle type, or driver preference.
The Tow-Pro®Elite features Active Calibration which constantly monitors the direction
of travel and will even calibrate with no trailer attached whilst maintaining the ability to
mount in any orientation.
The unit is able to operate electric trailer brakes from either 12V or 24V vehicle
systems without the need for manual selection or extra components/ wiring.
The unit is able to operate Electric / Hydraulic trailer brakes from 12V vehicle systems.
EBRH-ACCV3-NA Instruction Manual – Version 1

2
WARNINGS & SAFETY INSTRUCTIONS
4. Ensure the remote head push-button activates correctly when installed into surfaces with a
thickness greater than 9/64” (3.6mm). Failure to activate correctly would result in not being able
to activate the override function or change modes.
5. Ensure that the wire(s) and all connections used to install the Tow-Pro®Elite are suitably rated to
supply the required current to simultaneously operate the trailer electric brakes and stop lamps.
Incorrect wiring can result in reduced (or total loss of) trailer braking and/or damage to property
or persons.
6. The Tow-Pro®Elite is suitable for trailers with electric brakes up to three axles. Note that Federal
and State laws apply to trailer weights and brake controller requirements. Please consult your
local authority to ensure you comply with the legal requirements.
7. Do not drive with the Tow-Pro®Elite while a fault code is active. Fault codes of the Tow-Pro®
Elite may indicate conditions that make it unsafe or illegal to drive, including unreliable trailer
brakes or failure of brake lights.
8. During the calibration step of the Tow-Pro®Elite, braking of the trailer may be inconsistent.
REDARC recommends calibrating the Tow-Pro®Elite without a trailer attached.A normal drive of
a few miles will do for this purpose. If calibrating with a trailer attached, then the recommended
dial setting for the Tow-Pro®Elite is 4 or less.
1. Ensure that a correct grounding point is used. Vehicles often have ungrounded metal
reinforcements under the dash and these points are not suitable grounds. Bad grounding of the
unit will result in poor or no operation.
2. The Tow-Pro®Elite does not act as a trailer lights voltage converter. If the trailer brake lights
operate on a different voltage, damage to the vehicle; trailer and/or Tow-Pro®Elite and
associated wiring may result. This may also result in reduced (or total loss of) trailer braking.
3. When installing the Tow-Pro®Elite Remote Control to a thin panel, washers are recommended
to reinforce the structure of the panel.
4. Do NOT exceed Tow Vehicle and Trailer weights and specifications. Failure to abide by the towing
regulations, including maximum loads, may result in a fine, or in case of an accident, refusal of
the insurance claim, and the possibility of further legal action.
If the tow vehicle or trailer’s maximum load is exceeded, police and transport authorities have
the power to order the combination off the road until the issue is corrected. This may necessitate
leaving the trailer on the side of the road while a vehicle with suitable towing capacity is sourced
or the trailer load is reduced. Please contact your local authorities for further information.
5. If no trailer is connected, Active Calibration may occur as normal without any indication from the
LED. The LED will already be Blue when the trailer is connected. Essentially, whether a trailer is
connected or not, just drive normally and Active Calibration will ensure the Tow-Pro®Elite learns
the correct direction of travel.

3
CONTENTS
Table of Contents Page
1 - Specifications 3
2 - Installation 5
2.1 - Mounting the main unit 5
2.2 - Wiring the brake controller 6
2.2.1 Red Wire (Vehicle Brake light) Connection 7
2.2.2 Wiring Diagrams - Electric Brakes 8
2.2.3 Wiring Diagrams - Electric / Hydraulic Brakes 9
2.2.4 Wiring Diagrams - Vehicles with CAN Bus System 10
2.3 - Mounting the Remote Head 11
2.4 - Installation Accessories 11
2.5 - Universal Switch Panel Insert 11
2.6 - Mounting the remote head on a dash or console panel 12
2.7 - Active Calibration 13
3 - Operation 14
3.1 - Adjusting the Braking Force 14
3.2 - Manual Override 14
3.3 - Operating Modes 15
3.3.1 - Proportional Mode (Blue LED) 15
3.3.2 - User Controller Mode (Green LED) 15
3.3.3 - Changing Modes 16
3.4 - Park Brake Feature 16
3.5 - Visual User Guide 17
3.6 - LED Indication 18
3.7 - Troubleshooting 18
4 - Periodic Maintenance / Checks 21
5 - Frequently Asked Questions 22
6 - Wiring Gauge Guide 23
7 - Checking the Product Serial Number 23
8 - FCC Declaration 24
9 - Notes 25
10 - Two Year Product Warranty 26
1 SPECIFICATIONS
Part Number EBRH-ACCV3-NA
Operating Voltage 9V - 32V
Nominal Input System Voltage 12V 24V
Brake Input Signal Voltage OFF: 0V
ON: +12V nominal
OFF: 0V
ON: +24V nominal
Brake Coil Voltage 12V 12V
Max. Trailer Axles 3 Axles 3 Axles
Nominal Current Draw 18A 18A
Max. Rated Current 25A 30A
Standby Current <5mA
Operating Temp -4 °F to 140 °F (-20°C to +60°C)
Weight 7.05 oz (200g)
Warranty 2 years

4
1 SPECIFICATIONS
Kit Contents
1. Remote Head Assembly
2. Main Unit
3. Remote Head Nut
4. Remote Head Knob
5. Remote Head Bezel
6. Remote Head Cable 3’3” (1m)
7. Main Unit Wires & Connector 1’7” (0.5m)
8. Tow-Pro universal switch insert panel
Dimensions & Connection
1
2
4
3
5
6
7
8
0.39” (10.0mm) 0.39” (10.0mm)
Brake
Lights
(RED)
Input
Power
(BLACK)
Ground/
Earth
(WHITE)
Brake
Output
(BLUE)
Remote Head
Connection
0.77”
(19.6mm)
0.58”
(14.7mm)
(Recommended)
0.45” (11.5mm)
0.79” (20.0mm)
0.79” (20.0mm)
0.79”
(20mm)
1.25”
(31.7mm)
1.18”
(30.0mm)
3.33” (84.5mm)
2.64” (67mm)
2.92” (74mm)
3.94” (100.0mm)
4.09” (104.0mm)
1.13”
(28.8mm)

5
2 INSTALLATION
2.1 Mounting the main unit
The Tow-Pro®Elite should be mounted inside the vehicle cabin using either 5/32”
(M4) diameter screws or other secure fitting methods at the mounting points
provided. It is essential to mount the unit in a location which allows access to the
intended remote head location.
The Tow-Pro®Elite can be mounted in any orientation as long as the installation
is secure and the main unit cannot move or change orientation once installed. A
change of orientation will affect the system calibration.
Ensure that the Tow-Pro®Elite is mounted securely in a fixed location. Failure
to mount securely will result in inaccurate braking force measurements and
incorrect braking of the trailer.
Ensure that the Tow-Pro®Elite is installed inside the vehicle cabin and away
from any environmental conditions that may cause damage, including engine
heat, submersion in water, salt spray and humidity. Exposure to these conditions
may cause damage to the unit’s circuitry and may cause erratic trailer braking.
Any Secure Orientation OK
Do Not Mount to Cables / Wiring Looms
(Must be mounted to a rigid or solid object or surface)

6
2 INSTALLATION
2.2 Wiring the brake controller
REDARC Electronics manufactures a number of vehicle-specific wiring
harnesses for quick and easy installation (refer to REDARC’s website for details).
The universal wiring harness included with th EBRH-ACCV3-NA kit is the TPH-
025 ‘Universal Harness’ which is typically used for older vehicles not covered by
our range of wiring harnesses. Please follow the subsequent instructions for all
custom installations.
A Fuse or Circuit Breaker of appropriate rating must be installed to protect the
vehicle system. Please refer to the installation instructions starting on Page 7
for specific instructions on where to install the Fuse or Circuit Breaker and for
appropriate Fuse or Circuit Breaker rating. The Fuse or Circuit Breaker must be
installed as close as possible to the battery.
Ensure that the wire(s) and all connections used to install the Tow-Pro®Elite
are suitably rated to supply the required current to simultaneously operate the
trailer electric brakes and stop lamps. Incorrect wiring can result in reduced (or
total loss of) trailer braking and/or damage to property or persons.
The Tow-Pro®Elite does not act as a trailer lights voltage converter. If the trailer
brake lights operate on a different voltage, damage to the vehicle; trailer and/
or Tow-Pro®Elite and associated wiring may result. This may also result in
reduced (or total loss of) trailer braking.

7
2 INSTALLATION
2.2.1 Red Wire (Vehicle Brake light) Connection
The requirements for a suitable connection of a brake controller trigger wire are
quite specific. This connection point must:
• Provide a voltage of the same voltage level as the “Start Battery*” while the
vehicle brakes are applied.
• Have 0 volts output while the vehicle brakes are not applied
• Accept battery voltage input when the brake controller manual over-ride is
operated and illuminate at least the trailer brake lights.
• Accept the battery voltage input as above without causing any damage, spurious
vehicle operation or erroneous fault indication.
A relay should not be installed to drive the red wire as this would prevent the override
feature from working and may introduce dangerous voltage spikes.
* Start Battery voltage output means, directly from the Start Battery and within 0.4V of Supply (Black
wire) voltage.

8
2 INSTALLATION
2.2.2 Wiring Diagrams - Electric Brakes
For 12V and 24V vehicle electrical systems, the Tow-Pro®Elite is designed to operate
electric brakes without the need for any additional converters. For wire selection refer
to the wiring gauge guide in Section 6.
To 12V Vehicle
Brake Light trigger
(refer to Section 2.2.1)
To 12V Electric
Trailer Brakes
Blue
Red
25A Fuse or
30A Circuit Breaker
(CBK30-EB)
12V Vehicle
Start Battery
Ground
Black
-
Dash mount
controls for
Tow-pro.
White
14AWG (1.25mm²)
12AWG (3.0mm²)12AWG (3.0mm²)
14AWG (1.25mm²)
Ground
12V
24V
INPUT
To 24V Vehicle
Brake Light trigger
(refer to Section 2.2.1)
To 12V Electric
Trailer Brakes
Blue
Red
25A Fuse or
30A Circuit Breaker
(CBK30-EB)
24V Vehicle
Start Battery
Ground
White
Black
-
Dash mount
controls for
Tow-pro.
Ground
14AWG (1.25mm²)
12AWG (3.0mm²)12AWG (3.0mm²)
14AWG (1.25mm²)
The Input Power (Black) wire must be connected directly to the positive terminal
of the start battery via a Fuse (25A) or Circuit Breaker (30A) and not through
an Ignition source.

9
2 INSTALLATION
2.2.3 Wiring Diagrams - Electric / Hydraulic Brakes
Always refer to the manufacturer’s specifications for your Electric/Hydraulic
Braking system prior to installation and usage of the Tow-Pro®Elite.
12V Vehicle Systems
The Tow-Pro®Elite is designed to operate both Electric trailer brake systems and 12V
Electric / Hydraulic trailer brake systems. However, most Electric / Hydraulic systems
require a separate 12V power feed for the hydraulic pump. For example:
Electric / Hydraulic
System
12V Start Battery Power Supply for
Electric/Hydraulic System
Output Wire (Blue)
Tow-Pro
Brake Signal
For wire selection refer to the wiring gauge guide in Section 6.
24V Vehicle Systems
Since Electric/Hydraulic braking systems can be sensitive to 24V inputs depending
on the electronics within the hydraulic pump system the The EBRH-ACCV3-NA
should only be used with electric/hydraulic braking systems in 12V vehicles.
INPUT
To 12V Vehicle
Brake Light trigger
(refer to Section 2.2.1)
To Electric / Hyrdaulic
Brake System
Blue
Red
25A Fuse or
30A Circuit Breaker
(CBK30-EB)
12V Vehicle
Start Battery
Ground
Black
-
Dash mount
controls for
Tow-pro.
14AWG (1.25mm²)
12AWG (3.0mm²)12AWG (3.0mm²)
White
14AWG (1.25mm²)
Power Supply
for Electric/Hydraulic
Brake System
Refer to Electric/Hydraulic system manufacturer
specifications for power supply wire gauge and fuse rating
Ground

10
2 INSTALLATION
2.2.4 Wiring Diagrams - Vehicles with CAN Bus System
Many modern vehicles use a CAN Bus system for signalling when to apply the
vehicles brakes as required by safety systems including adaptive cruise control,
stability control, Autonomous Emergency Braking (AEB) and hill descent control. For
these vehicles, REDARC recommend the following wiring configuration.
White
To Vehicle Brake
Light Trigger
To 12V Electric
Trailer Brakes
Blue
Red
30A Circuit Breaker
(CBK30-EB)
To Vehicle
Start Battery Black
Dash mount
controls for
Tow-pro.
To Chassis Ground Bolt

11
2 INSTALLATION
2.3 Mounting the Remote Head
The Tow-Pro®Elite remote head is designed to be mounted at a distance from the
main unit, allowing for a neat, convenient installation and not impeding on lower
leg airbags or driver leg room. The Tow-Pro®Elite remote head is designed to be
mounted on or around the vehicle dashboard and when installed correctly, complies
with Australian Design Rule (ADR) 21, which sets requirements for devices mounted
on the dashboard.
The Tow-Pro®Elite remote head can be mounted directly to the dashboard, to the
centre console or through a spare knock-out switch panel and requires only one
hole to be drilled as per the Mounting Guide in Section 2.5. For easy access in an
emergency situation, REDARC recommend installing the remote head within reach
of the driver such as the regions shaded in the diagram below.
2.4 Installation Accessories
REDARC offer a range of vehicle specific switch inserts and
vehicle specific wiring kits designed to make the installation of
the Tow-Pro Elite easier.
The range includes most popular SUV & LCV’s and is frequently
being updated and added to. A full listing of Switch Inserts
and Wiring Kits is available on and can be purchased from the
REDARC website. Please visit redarcelectronics.com or follow the above QR code
for a direct link to the appropriate page.
2.5 Universal Switch Panel Insert
Refer to “TPSI-001 installation instructions” included with this
kit.

12
2 INSTALLATION
2.6 Mounting the remote head on a dash or console panel
Ensure that there is enough space behind the mounting location to fit the Tow-Pro
control head and remote head cable before drilling any holes.
Ensure the remote head push-button activates correctly when installed into
surfaces with a thickness greater than 1/8” (3.2mm). Failure to activate
correctly would result in not being able to activate the override function or
change modes.
2
Apply adhesive bezel (optional)
to cleaned surface
Gently bend bezel
to aid removal of
white backing tape
4
Turn shaft fully anti-clockwise
3
Insert Remote Head shaft through
the hole and fasten with nut
Torque to 0.6 ft-lb (0.8Nm)
1
Drill 25/64" (10mm) mounting hole
25/64"
(10mm)
(drill pilot
hole first)
1/16"- 9/64"
(1.25-3.6mm)
6
Test installed remote head
for correct function
5
Apply knob with ‘0’ aligned
to level marker on the bezel
Level marker

13
2 INSTALLATION
2.7 Active Calibration
When the unit is first powered, Active Calibration must first become confident
in the vehicle direction of travel. Until this time the LED will flash Blue/Green.
Time Time
During Calibration: Once Calibrated:
Active Calibration constantly monitors the vehicle’s direction of travel and allows
the Tow-Pro®Elite to ‘learn’ and continuously confirm its mounting orientation. This
process occurs whilst the vehicle is moving and the brake is applied and will occur
with or without a trailer connected.
When the Tow-Pro®Elite is first installed it will begin learning its mounting orientation
through Active Calibration as soon as you start driving, at this point Proportional
Mode is selected but not yet fully operational.
Until the Tow-Pro®Elite has determined its mounting orientation the unit will function
as if in User-Controlled mode, this is indicated by the LED glowing green with blue
flashes. As the Tow-Pro®Elite becomes more confident of its direction of travel the
length of the Blue flash will increase, to the point that the LED is solid Blue which
indicates it is now operating completely in Proportional mode.
Under normal driving conditions the Tow-Pro®Elite will learn its mounting orientation
within 20 brake applications. Note that the braking must be perceptible (applying
the brake while stopped will not assist calibration).
If power is disconnected (for example, if the vehicle battery is changed) calibration
memory will be lost and the unit will recalibrate itself using active calibration. This
is similar to a radio losing its clock or preset station memory.
If no trailer is connected, Active Calibration may occur as normal without
any indication from the LED. The LED will already be Blue when the trailer is
connected. Essentially, whether a trailer is connected or not, just drive normally
and Active Calibration will ensure the Tow-Pro®Elite learns the correct direction
of travel.

14
3 OPERATION
3.1 Adjusting the Braking Force
In both modes the braking level can be adjusted to
suit varying trailer loads, braking requirements or
user comfort by adjusting the control knob on the
remote head.
The lower end of the scale (below level 5) should be
used as a starting point and adjusted accordingly
once braking requirements are established.
If a lighter braking level is required, turn the control knob to a lower number
(anti-clockwise) to reduce the trailer braking force. Similarly, turn the gain control
knob to a higher number (clockwise) to increase the trailer braking force.
The braking level will be indicated by the LED changing to a shade of RED when the
brakes are applied. The higher the braking level, the more RED the LED will glow.
A setting of ‘0’ will result in no trailer braking output.
3.2 Manual Override
Pressing the gain control knob whilst driving will
apply the manual override brake.The manual override
brake will apply the trailer brakes only; if wired
correctly will also apply the trailer brake lights and
will turn the LED indicator a shade of RED. Depending
on the vehicle wiring it may possibly also apply the
vehicle brake lights. The manual override is designed
to be used when the trailer brakes need to be applied
without the vehicle brakes, such as correcting trailer
‘sway’ whilst travelling.
In Proportional mode the manual override will apply the trailer brake to a level
equivalent to ‘light’ vehicle braking.
In User Controlled mode the manual override will apply the trailer brakes to the
level set on the gain control knob.
In both modes the braking force can be adjusted by turning the gain control knob,
either higher or lower, even whilst applying the manual override brakes.
Manual override should not be used in place of the regular vehicle
brakes.
2
0
4
6
8
10

15
3 OPERATION
3.3 Operating Modes
The Tow-Pro®Elite offers two modes of operation - Proportional and User
Controlled. On the first application of power to the black wire, the Tow-Pro®Elite
will start-up in Proportional mode. Every time a trailer is connected, the Tow-Pro®
Elite will start up in the mode that was last selected (provided the black wire has
remained connected to power/battery positive).
3.3.1 Proportional Mode (Blue LED)
If the status indication LED on the control knob is glowing
BLUE, the Tow-Pro®Elite is in Proportional Mode.
In Proportional Mode, the Tow-Pro®Elite will apply
the trailer brakes at a level proportional to the vehicle
deceleration. The control knob setting, 0 to 10, will
set the brakes from a lighter to a heavier trailer brake
application. Simply put, the harder the vehicle brakes
are applied, the harder the trailer will brake. This
mode is designed for highway travelling or everyday
use and requires minimal input from the user whilst
travelling.
3.3.2 User Controlled Mode (Green LED)
If the status indication LED on the control knob is glowing
GREEN, the Tow-Pro®Elite is in User Controlled Mode.
In User Controlled Mode, the Tow-Pro®Elite will apply
the trailer brakes to the level set by the user on the gain
control knob. The control knob setting, 0 to 10, will set
the brakes from Zero to Full trailer brake application.
Simply put, the trailer will brake to the level set by
the control knob (regardless of how hard the vehicle
brakes). This mode is often preferred for off road or
precision use and may require frequent attention from
the user.
It is important to consider the road surface and conditions when selecting a
mode and level setting. When changing conditions we advise to review your
controller settings and adjust according to your preference.
2
0
4
6
8
10
2
0
4
6
8
10

16
3 OPERATION
3.3.3 Changing Modes
Changing modes can only be completed with a trailer connected. Ensure the vehicle
has come to a complete stop before beginning the mode change process.
Changing between modes requires the user to complete the following process:
2
Apply Vehicle Brakes
4
Release Vehicle Brakes
x2
3
Double-click the knob
(two pushes within 1 second)
2
0
4
6
8
10
1
Rotate the knob
fully counter-clockwise
If you’re unable to change modes, check that the remote head is not installed
into a surface which is too thick and that the button is able to be depressed
fully. Refer to Section 2.5 for details. Ensure you reset the dial to a suitable
braking level after changing modes.
3.4 Park Brake Feature
If the Tow-Pro®Elite detects that the vehicle brakes are applied for longer than 3
seconds whilst the vehicle is stationary, it will apply the trailer brakes in an intelligent
manner to reduce the required braking effort whilst decreasing the risk of rolling
forward or backward whilst stopped. If the controller determines the trailer brakes
are not required to keep the vehicle stationary, the output will be decreased to Zero.

17
3 OPERATION
3.5 Visual User Guide
Proportional Mode User Controlled Mode
1
Lighter
Trailer
Heavier
Trailer
Blue
LED
Colour
Rotate knob to adjust brake level
2
Red
LED
Colour
Brake
Applied
1
Lighter
Brake
Force
Heavier
Brake
Force
Green
LED
Colour
Rotate knob to adjust brake level
2
Red
LED
Colour
Brake
Applied
3‘Light’ Application
of Trailer Brakes only.
3Applies Trailer Brakes only,
to the level set on the
gain control knob.

18
3 OPERATION
3.6 LED Indication
The Tow-Pro®Elite will indicate both Mode and Fault Condition through colour and
flash sequences of the LED indicator. The table below shows how the Tow-Pro®Elite
will indicate Normal Operation of the unit.
NOTE: LEDs will glow full brightness when gain control is adjusted or manual
override is pressed. After release of the gain control knob the LED brightness
will reduce. This is designed to be less intrusive on driver’s vision at night.
Status Indication
Mode Proportional User Controlled
Calibration Blue/Green flashing Not Applicable
Sleep Mode1Blue Breathing on button push2
Trailer Connected Solid Blue Solid Green
Braking Blue to Red3Green to Red3
Fault Code
(trailer braking performance
potentially compromised)
Flashing in any sequence (other than Blue/Green)
Please refer to troubleshooting section (Section
3.9) or contact an experienced auto-electrician.
1. Sleep Mode occurs when there is no trailer connected to the vehicle.
2. Breathing, as opposed to flashing, is the LED gradually getting brighter until its brightest point and then
gradually dimming until off. In the event of trailer disconnection, breathing will occur after 1 minute.
3. The LED will vary between the Mode Colour (Blue or Green) and Red depending on the braking force.
3.7 Troubleshooting
The Tow-Pro®Elite features sophisticated diagnostics to warn the operator of faults
in the vehicle and trailer brake wiring. Wiring faults are indicated by a series of
colour coded flash patterns on the Tow-Pro®Elite LED.
Most faults turn out to be something simple such as a poor connection from a dirty
trailer socket, however a fault indication should not be ignored! It is a warning; if left
unattended such wiring faults can become worse and may lead to deterioration or
loss of trailer braking.
Please refer to the table on Pages 19 & 20 for the list of flash patterns, showing the
cause & recommended course of action for each of the conditions which may be
detected.
Even intermittent faults are detected and may be indicated until cleared.
Fault codes can be cleared by unplugging the trailer for 1 minute then
reconnecting.

19
3 OPERATION
LED Sequence Symptom/Description Possible Cause Suggested Action
1 Second
BLUE Breathing when
the Override button
is pushed
The trailer brakes have
not been detected OR the
trailer is not plugged in
Check the trailer plug and
all connections between the
controller & brakes
Time
Flashing a Blue/
Green sequence
The unit is in the process
of calibrating, this is NOT
a fault
Keep driving normally and
the unit will calibrate
1 Second
The LED is YELLOW
and flashes PURPLE
twice
There is a fault with the
unit and/or the installation
Check and clean trailer plug
connection. Please contact
REDARC or visit your local
auto-electrician for further
assistance
1 Second
The LED is YELLOW
and flashes RED
once per second
There is a short circuit
somewhere on the brake
output line (BLUE wire)
Check all wiring from the
unit to the trailer brakes for
any wiring faults, including
at trailer plug or within
brake hubs
1 Second The LED is YELLOW
and flashes RED
twice per second
There is a short circuit
somewhere on the brake
light circuit (RED wire)
Check all wiring from the
unit to the brake light trigger
for any wiring faults
1 Second
The LED is YELLOW
and flashes RED four
times per second
There is a break/open
circuit somewhere along
the Tow-Pro®Elite’s
Ground circuit (WHITE wire)
Check all ground
connections and associated
wiring for any wiring faults
1 Second
The LED is BLUE and
flashes RED once
per second when
vehicles brake not
applied
The unit has detected that
the Remote Cable is faulty,
or it is in calibration mode
with a permanent input on
the brake light trigger
Check the Remote cable is
fully plugged in, otherwise
replace; check red wire has
0V when vehicle brake is
not applied
1 Second The LED is flashing
RED
The unit has detected an
internal fault of your Al-Ko
iQ7 hydraulic/pneumatic
system
Check for faults according
to the manual for the Al-Ko
iQ7 actuator
There is a voltage drop
between the trailer ground
and the vehicle ground
If you don’t have an Al-Ko
iQ7, check for suitable
wiring on the trailer ground
circuit
1 Second
The LED is flashing
GREEN only whilst
braking
Loss of supply power or
Circuit Breaker cycling
Check supply (BLACK)
wire for good connection &
check circuit breaker/fuse
not blown and correct value
1 Second
The LED is flashing
GREEN at any time
Hesitation during
connection of BLACK
wire possibly causing
incomplete startup
sequence
Disconnect BLACK
wire, wait 1 minute and
reconnect BLACK wire to
the battery