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Thread: LED dash lights

  1. #11
    Join Date
    Oct 2017
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    Oxford
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    I am pretty sure it is because the LED offers less resistance than a traditional bulb, so the fix is to put a resistor into the cable
    Classic Replica Viper currently in build

  2. #12
    Join Date
    Aug 2004
    Location
    Christchurch, NZ
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    59
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    2,330
    LEDs present more resistance than a bulb, that's why they draw less current. Putting a diode in series will hide the symptom, putting a resistor in series will make the LED dimmer.
    Cheers

    Myles D-W

  3. #13
    Join Date
    Oct 2017
    Location
    Oxford
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    739
    I know when I fitted an led battery/alternator warning light on my Westfield dash, I fitted a 100ohm resistor across the led terminals to stop it faintly glowing/flickering when the engine was just ticking over. Worked a treat
    Last edited by KugaWestie; 18-02-20 at 07:31 PM.
    Classic Replica Viper currently in build

  4. #14
    Join Date
    Aug 2004
    Location
    Christchurch, NZ
    Age
    59
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    2,330
    Resistor in parallel is a good idea for the ignition light not only to stop it flickering as you describe but also to help the alternator 'boot-up' cleanly if the LED does not flow enough current.
    Cheers

    Myles D-W

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