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Old 05-24-2022, 12:50 PM   #1
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LED dash lights

Didn't want to add to a four year old post so I will start a new one.
The dashboard indicator lights are impossible to see in the daylight so I ordered new bulbs from super bright led. I got all of the bulbs replaced easy enough and found they are polarity sensitive. So, after testing all the bulbs and ensuring they are all installed correctly I find another issue with four of the bulbs. after start up, the Cruise control, Stop, wait to start and the engine warning light all seem to have some current going thru them and stay dimly lit, just enough to let me know. They all light up super bright when the key is first turned on, and cycle off when the coach is ready to start. Just the four stay dimly lit.

Has anyone else had this issue? I swapped the bulbs with the spares I bought and that does not help. I phoned the company help line and he was no help at all, just told me to turn the bulbs and see if that helped.
Thought I would ask here before looking any further. Thanks in advance for your help
Ive attached photos of the lights when the key is first cycled, and after the cycle has ended and after start up.
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Old 05-24-2022, 01:31 PM   #2
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This a problem with LED's - it doesn't require near as much current to make them light as tungsten light bulbs do so any slight current leakage from/through a transistor, whether singly mounted or embedded in a chip, will allow an LED to glow dim.

This isn't easy to solve other than trial and error with different manufacturers bulbs.
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Old 05-24-2022, 02:02 PM   #3
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Caution

I changed mine. Then I had intermittent issues with the ATC light. The ATC is linked to the ABS braking system to help with lost traction while not braking. Some vehicles have a switch to disable they system when for example in snow.

After extensive testing and conversation with WABSC the manufacture, I figured out the LED light fools the ABS controller, thinks the ATC is turned off and turns on the lamp.

I went back to a standard bulb and that system works again.

All my other bubs are LED but some have a very slight illumination when off.
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Old 05-24-2022, 10:43 PM   #4
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Quote:
Originally Posted by MrMark52 View Post
This a problem with LED's - it doesn't require near as much current to make them light as tungsten light bulbs do so any slight current leakage from/through a transistor, whether singly mounted or embedded in a chip, will allow an LED to glow dim.

This isn't easy to solve other than trial and error with different manufacturers bulbs.
Thank you, I might try another bulb and see if that fixes it. I have the polarity correct so at least the bulb will light up if need be.
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Old 05-24-2022, 10:47 PM   #5
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Quote:
Originally Posted by gpounder View Post
I changed mine. Then I had intermittent issues with the ATC light. The ATC is linked to the ABS braking system to help with lost traction while not braking. Some vehicles have a switch to disable they system when for example in snow.

After extensive testing and conversation with WABSC the manufacture, I figured out the LED light fools the ABS controller, thinks the ATC is turned off and turns on the lamp.

I went back to a standard bulb and that system works again.

All my other bubs are LED but some have a very slight illumination when off.
Thank you for the response. I did read that the ATC has problems with LED, so I left the regular bulb in it. The bulb in the ABS was missing so I put a bulb in there. It's lit up now, so I guess I will see if it stays on or not.
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Old 05-26-2022, 12:05 AM   #6
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If I remember correctly..dudes in the previous thread were using a window tint type product over the gauge lights so as to prevent the low but constant ON condition of some of the LED light swaps...

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Old 05-26-2022, 06:32 PM   #7
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If I remember correctly..dudes in the previous thread were using a window tint type product over the gauge lights so as to prevent the low but constant ON condition of some of the LED light swaps...

Ch
That's a great idea Chris. Thank you
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Old 05-28-2022, 02:02 AM   #8
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No problem...let us know how it works out if you try it!

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Old 05-31-2022, 02:12 PM   #9
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Not trying to hijack, I have Superbright LEDs as well and since install my ATC light is on-off-on-off for 1 second cycles anytime the coach is running. Should I pull it and re-install the original bulb for it (and the ABS light)?
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Old 05-31-2022, 02:18 PM   #10
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Not trying to hijack, I have Superbright LEDs as well and since install my ATC light is on-off-on-off for 1 second cycles anytime the coach is running. Should I pull it and re-install the original bulb for it (and the ABS light)?
Hi Steve, I would change the ATC bulb out as it seems to be the problematic one. I left the regular bulb in the ATC slot and have not had an issue with it. Im not sure about the ABS bulb since I found there was no bulb installed there when I changed mine out. I put a regular bulb in the holder and the ABS light stays on so I will have to check the sensors and such for any issues.
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Old 05-31-2022, 10:37 PM   #11
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Ok, thanks. My ABS light is not lit and is now LED, so I will leave it and switch the ABS back to incandescent bulb.
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