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Faulty Operation

Please note that in the unlikely event that you have a faulty headlamp; reported failures are often the result of issues unrelated to our LED products. A returned product that is found to be functioning properly results in unnecessary costs to our customers; in both shipping and time. Before requesting a return, please take a few simple steps to ensure that the problem you are experiencing is the result of a faulty lamp and not issues with your Defender wiring.

Light will not Operate:

  • Step01 - Bench Test.
    Remove the lamp from the application and test it on the bench using a Power Supply of the appropriate voltage. If the lamp functions properly on the bench, the problem lies elsewhere and a return would not be necessary. We understand that this is not always possible, and so step 2 below will help you futher in your diagnosis.
  • Step02 - Swap with Functioning Lamp.
    If another lamp of the same type is in use, switch positions and see if the problem follows the lamp. If it does, the problem is likely with the lamp. If not, the problem is likely somewhere else in the circuit. If the problem follows the lamp, please contact us on This email address is being protected from spambots. You need JavaScript enabled to view it..

Light flickers:

  • Step01 - Testing the Input Voltage.
    Unlike traditional lights which merely dim with low voltage, LEDs will flicker. Use a multi-meter to test the input voltage (the application’s output voltage). Anything more than 1-2 volts lower than the stated operating voltage could result in flickering.
  • Step02 - Swap with Functioning Lamp.
    If another lamp of the same type is in use, switch positions and see if the problem follows the lamp. If it does, the problem is likely with the lamp. If not, the problem is likely somewhere else in the circuit.

If the above tests continue to point to a faulty lamp, please contact us on This email address is being protected from spambots. You need JavaScript enabled to view it..

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