The Tow-Pro Elite, when used with the Ford Ranger/Everest Wiring Kit (TPWKIT-012), may show issues like false trailer warnings, fast-flashing indicators, brake light circuit fault codes, or reverse sensors and cameras not working if the Signal Conditioning Module is faulty.
Before testing, confirm correct installation and inspect wiring for damage. To test, disconnect the module and use a multimeter in diode mode: the Vehicle-to-Tow-Pro pin test should read open circuit one way and about 0.4V the other.
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 products:
- Tow-Pro Elite V2 (EBRH-ACCV2)
- Tow-Pro Elite V3 (EBRH-ACCV3)
- Ford Ranger/Everest Wiring Kit (TPWKIT-012)
Tools required
- Multimeter with a diode test function
When would I need to test the signal conditioning module?
If your vehicle has the TPWKIT-012 installed and you are experiencing some or all of the listed issues when no trailer is attached, it could result in a wiring issue or damaged Signal Conditioning Module.
Possible vehicle symptoms:
- Trailer warning lamp on with no trailer detected
- Dashboard indicator pilot light flash at a faster rate
- Logged fault codes relating to brake light circuit
- Reverse sensor/alarm does not operate
- Reverse guidance/camera does not function correctly
How to test the signal conditioning module?
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
Testing the signal conditioning module
Once you have confirmed that any of the issues listed above are occurring, prior to testing the Signal Condition Module check the following:
- Ensure the Ford Ranger/Everest Wiring Kit (TPWKIT-012) was used.
- Review User Manual.
- Confirm installation is correct.
- Review wiring, looking for damaged or squashed wiring harness or visible damage.
If everything looks okay refer to the next test.
Disconnect the Signal Conditioning Module from the TPWKIT-012 wiring harness, then using a multimeter, refer to the following test procedure:
- Using a multimeter with a diode test function, set to the diode test.
Note, most multimeters will require you to select it and press a mode button. Connect the multimeter positive lead (red) into the pin labelled Vehicle Pin and negative lead (black) into the Pin labelled Tow-Pro (indicated on the Signal Conditioning Module). It should read open circuit (OL or OC).
- Connect the multimeter negative lead (black) to the Vehicle Pin and the positive lead (red) to the Tow-Pro Pin (indicated on the Signal Conditioning Module). It should read a voltage approx. 0.4V.
- If the outcomes listed in steps 2 & 3 are confirmed, this indicated that the signal conditioning module is working correctly and is not the cause of the symptom.
- If the outcome from the testing result in step 3 results in short circuit or open circuit, this indicates that the Signal Conditioning Module is faulty and needs replacing.
If you reach step 4 & 5 and are unable to trace or address the issue, further diagnostic testing is required by a specialist and REDARC recommends seeking the support of an installer.