LED Indicator bulb upgrade - sucess

[Flyingbrick]

  wow I don't know how the existence of switchback bulbs eluded me up to this point.
Thanks coconut

[Coconut]

louping77

The bulbs you bought for the rear probably have Resistors ( not fuses ) built in,
whereas the front "Switchback" type have externally mounted Resistors.

Resistors are needed to prevent "hyperflash" ( Excessively fast flashing of the bulbs ).

This can occur because the Flasher circuit ( built into the Instrument panel with no separate Flasher Unit ),
is designed to sense the current flowing through the Indicator circuit.

Standard Indicator bulbs are usually 21 Watts, so 2 Standard Filament Bulbs would draw 3.5 Amps at 12 Volts.

If one bulb fails, the circuit senses the reduction in current and flashes the remaining good bulb,
together with the Instrument "Tell Tale" bulb at a much faster rate ( "Hyperflash" ) to alert the Rider of the failure.
In the UK this feature ( or some other method of alerting an indicator bulb failure ) is a legal requirement.

When LED bulbs are used, which do not draw as much current as standard filament bulbs,
the current sensing circuit is fooled into thinking a bulb has blown, even when both LED bulbs are good,
triggering the "Hyperflash" function.

To overcome this, Resistors are used for each LED bulb, either built into the bulb,
or externally mounted - their purpose is to increase the current drawn
and prevent triggering of the "hyperflash" function.

I cannot answer your question about which patricular bulbs create Interference,
so my advice is - if you are experiencing Interference, turn the Indicator off
or remove one of the bulbs, and if the Interference stops - you found the cause !

Cheers 

[louping77]

Hi coconut
So if i remove one led bulb
And if interférences stop
Thats could mean it needs
To add resistors anyway?
Thx so much

[Coconut]

No, It just means that bulb is causing the interference.

The resistors are only to stop the “Hyper Flashing”

Cheap “Chinese” LED bulbs using cheap components may cause radio interference whether they have Resistors or not.

[louping77]

 Ok so the best solution
 Is to install same kind
 Of front led bulb bit with
 Resistors or reinstall OEM
 Bulbs?
 Thx

[Coconut]

Replace whichever bulb(s) are causing Interference with bulb(s) that don't !

I don't think there's anything else I can help with here. 

[louping77]

 Ok coconut
Thx so much
For help
 Have a nice evening
 

[Goodoni]

Originally Posted by trophied

Exactly what I put on the rear, but I used switchbacks on the front to get DRL advantange.  They are much brighter than stock.

Do these act like running lights, in other words always on, then blink when the turn signal is on>

Thanks,
Goodoni