To test a REDARC Charge Equalizer, use a multimeter and a 5W/24V test lamp. Keep the input (violet) and earth (green) wires connected, disconnect the output (brown) wire from the battery, and connect the test lamp between the brown wire and chassis.
Measure the voltages, the brown wire should read half the violet wire input. If readings are outside range, check wiring, connections, current draw, and ensure the Equalizer is rated correctly for the load.
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:
- 25A Charge Equalizer (CE25)
- 40A Charge Equalizer (CE40)
Tools required
Multimeter or voltmeter
5W/24V test lamp with connection leads or clips
Testing procedure
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
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Keep connections in place
Leave the input (VIOLET) wire and earth (GREEN) wire connected.
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Disconnect output
Remove the output (BROWN) wire from the battery.
Ensure the BROWN wire does not touch the chassis/earth.
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Connect test lamp
Attach the 5W test lamp between the BROWN wire and the chassis/earth.
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Measure output voltage
Place the voltmeter positive lead on the BROWN wire.
Place the voltmeter negative lead on the chassis/earth.
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Measure input voltage
Place the voltmeter positive lead on the VIOLET wire connection.
Place the voltmeter negative lead on the chassis/earth.
The BROWN wire voltage should be half the VIOLET wire voltage (within ±0.25V).
Important Note: If the test lamp is not connected, the BROWN wire voltage may read high (20V or more).
Testing examples
Example 1: Engine running
VIOLET wire = 28V
BROWN wire = 14V ±0.25V
Acceptable range: 13.75V to 14.25V
Example 2: Engine off
VIOLET wire = 24V
BROWN wire = 12V ±0.25V
Acceptable range: 11.75V to 12.25V
Troubleshooting
If readings are correct, the Charge Equalizer is operating properly.
If the 12V battery voltage is incorrect:
Check all wiring and connections.
Measure the 12V current draw.
Ensure the Charge Equalizer has a suitable rating for the load.