Question regarding an issue with LED bulb replacements.
Nov 7, 2014, 02:42 AM
#1
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Question regarding an issue with LED bulb replacements.
Hi Guys,
Im currently having an issue with replacing the filament bulbs with LED bulbs.
Prior to starting, i was aware that Indicator bulbs require load resistors, otherwise they hyper flash. So i avoided changing the x4 indicators and went on to replace all other bulbs.
I have replaced; Front parkers, reverse, rear parkers, brake & Top brake light.
Two issues i am expericing:
1.) the top brake light comes ON when you turn the park or headlights ON.
(it does increase its luminosity when you press brake, but it shouldn't come on at all usually)
2.) minor issue, with the lights OFF, pressing the brakes. The front parkers come on slightly. The Boost gauge light comes ON & dashboard clock goes slightly dim with the brakes depressed.
i have noticed, putting/ testing the brake light bulb (just even one bulb on one side back in)… every problem disappears.
it appears to be some sort of feedback caused by the LED.
has anyone had an issues like this before?
If a load resistor is required, where would be the easiest place?
Cheers
Im currently having an issue with replacing the filament bulbs with LED bulbs.
Prior to starting, i was aware that Indicator bulbs require load resistors, otherwise they hyper flash. So i avoided changing the x4 indicators and went on to replace all other bulbs.
I have replaced; Front parkers, reverse, rear parkers, brake & Top brake light.
Two issues i am expericing:
1.) the top brake light comes ON when you turn the park or headlights ON.
(it does increase its luminosity when you press brake, but it shouldn't come on at all usually)
2.) minor issue, with the lights OFF, pressing the brakes. The front parkers come on slightly. The Boost gauge light comes ON & dashboard clock goes slightly dim with the brakes depressed.
i have noticed, putting/ testing the brake light bulb (just even one bulb on one side back in)… every problem disappears.
it appears to be some sort of feedback caused by the LED.
has anyone had an issues like this before?
If a load resistor is required, where would be the easiest place?
Cheers
Nov 7, 2014, 11:35 PM
#2
Evolved Member
I had the exact same problem with mine.
I fixed it by soldering in some diodes into the parklight wiring right at the brake lights.
I think what was happening was that because the LED brake lights were leaking current into the parklight circuit when the brakes are applied, and vice versa when the parklights are switched on.
It was the way the LED lights are made, as with normal filament, the two filaments are separate. While the LEDs are just one circuit, with when you apply the brakes extra current is applied to make them brighter, so because of this current leaks where it isn't needed.
Putting diodes into the parklight circuit stopped this reverse leakage.
I fixed it by soldering in some diodes into the parklight wiring right at the brake lights.
I think what was happening was that because the LED brake lights were leaking current into the parklight circuit when the brakes are applied, and vice versa when the parklights are switched on.
It was the way the LED lights are made, as with normal filament, the two filaments are separate. While the LEDs are just one circuit, with when you apply the brakes extra current is applied to make them brighter, so because of this current leaks where it isn't needed.
Putting diodes into the parklight circuit stopped this reverse leakage.
Dec 13, 2014, 01:14 AM
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Hi Thanks for the reply.
Thats interesting.
i know resistors may work, but apparently resistors on brake lights is not a good idea.
Since it gets hot and can melt plastic etc.
Apparently its ok with blinkers since it only used briefly and comes ON and OFF… but parkers etc,being on all the time can cause other issues.
Im not that good with welding, so i kinda gave up on this idea.
I ended up replacing the brake/dual filament globes back and left all the others LED.
Thats interesting.
i know resistors may work, but apparently resistors on brake lights is not a good idea.
Since it gets hot and can melt plastic etc.
Apparently its ok with blinkers since it only used briefly and comes ON and OFF… but parkers etc,being on all the time can cause other issues.
Im not that good with welding, so i kinda gave up on this idea.
I ended up replacing the brake/dual filament globes back and left all the others LED.
I had the exact same problem with mine.
I fixed it by soldering in some diodes into the parklight wiring right at the brake lights.
I think what was happening was that because the LED brake lights were leaking current into the parklight circuit when the brakes are applied, and vice versa when the parklights are switched on.
It was the way the LED lights are made, as with normal filament, the two filaments are separate. While the LEDs are just one circuit, with when you apply the brakes extra current is applied to make them brighter, so because of this current leaks where it isn't needed.
Putting diodes into the parklight circuit stopped this reverse leakage.
I fixed it by soldering in some diodes into the parklight wiring right at the brake lights.
I think what was happening was that because the LED brake lights were leaking current into the parklight circuit when the brakes are applied, and vice versa when the parklights are switched on.
It was the way the LED lights are made, as with normal filament, the two filaments are separate. While the LEDs are just one circuit, with when you apply the brakes extra current is applied to make them brighter, so because of this current leaks where it isn't needed.
Putting diodes into the parklight circuit stopped this reverse leakage.
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