If the Tow-Pro remote head displays consecutive blue flashing, it indicates a fault that can be caused by one of three issues: continuous low voltage on the brake trigger wire, unstable supply power, or damage to the remote head cable.
To diagnose, check that the brake trigger wire shows 12–14V only when the brakes are applied, confirm the supply voltage between the black and white wires is stable, and inspect or replace the remote head cable if no other faults are found.
REDARC recommends seeking the support of a qualified auto electrician or technician.
Important
For your safety, REDARC recommends installation by a qualified auto electrician or technician. Our trusted REDNetwork is made up of professional auto electrical businesses certified by REDARC to install the complete of REDARC solutions. Find Your Local Installer
This information is applicable to the following Tow-Pro Electric Brake Controllers:
- Tow-Pro Elite V2 (EBRH-ACCV2)
- Tow-Pro Elite V3 (EBRH-ACCV3, EBRH-ACCV3-NA)
- Tow-Pro Classic (EBRHV2)
- Tow-Pro Liberty (EBRH-ACCNA, North America only)
How will this appear?
The Tow-Pro remote head will display consecutive blue flashing.
Check out our handy video troubleshooting guide or keep reading for full troubleshooting instructions.
What does the blue flashing fault mean?
This flash code indicates when the Tow-Pro remote head has detected a fault mode from one of three possible causes:
- Tow-Pro brake trigger wire (red) has a continuous low voltage.
- Tow-Pro supply power is not stable.
- Tow-Pro remote head cable is damaged.
How to determine the cause of this fault?
Below is a list of the common causes and repairs.
Important
In this article we explain the need for testing to determine the cause of the issue. Testing may involve changes to the installation or wiring. For your safety and accuracy, REDARC recommends engaging a REDNetwork member or a suitably qualified auto electrician - Find Your Local Installer
To identify the source of the blue flashing, it is recommended to follow this process, as there are three distinct factors that could be responsible.
1. Tow-Pro brake trigger wire (red) has a continous voltage
The Tow-Pro brake trigger wire (red) is connected to the vehicle’s brake light circuit and should receive battery voltage (approximately 12-14 volts) when the brakes are applied and 0 volts when the brakes are not applied. If there is any continuous low residual voltage present, this fault will be triggered.
Locate the Tow-Pro main unit under the dashboard and connect your voltmeter lead between the red and white wires on the main 4 pin connector.
- This can be achieved by back-probing into the connector.
- With the vehicle ignition ON (vehicle not running) check the voltage when brakes are OFF and ON.
- If there is any residual voltage when brakes are not applied, an alternate brake trigger source will need to be located, please refer to your closest installer.
- If the voltage is within the following specifications this is not the cause of fault, please refer to the second test process.
2. Tow-Pro supply power is not stable
The Tow-Pro is connected to battery power through the black (positive) and white (ground) in the 4-pin connector, and has an operating range of 9-32 volts, however if this voltage is unstable (fluctuating), this fault may be triggered.
- Locate the Tow Pro module under the dashboard and connect your voltmeter lead between the black and white wires on the main 4 pin connector. Note: The main 4 Pin connector must stay connected to the Tow-Pro Module throughout this test.
- With the vehicle running, check the voltage to ensure it remains stable.
- If the voltage is fluctuating either the black or white wire connections will require further assessment, please refer to your closest installer.
- If the voltage remains consistent, this is not the cause of the fault code, please refer to the third test process.
3. Damage to Tow-Pro remote head cable
The Tow-Pro remote head cable links the Tow-Pro remote head to the main unit, and any harm to this cable can lead to this issue.
- A physical fault in the cable might be spotted through a visual examination, but internal damage may remain concealed.
- If a visual inspection does not reveal any faults and tests confirm that causes 1 and 2 are not the problem, it's advisable to replace the remote head cable.
