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  #1  
Old February 5th, 2016, 11:42 AM
Roverlab
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LED lighting issue

I've installed a set of LED lights on all 4 corners of a 95 D90, as well as a electronic flasher. The issues are:
1)
If either turn signal is active when the brakes are applied, the opposite turn signal illuminates dimly, but only on the front!
2)
The Trailer icon does not illuminate with or without a trailer connected.
3)
If I disconnect the factory trailer wiring connector that has a Hoppy convertor in-line, issue #1 goes away. Issue #2 doesn't change

I have substituted another convertor from Hopkins, reviewed ground connections, removed the indicator bulb- had installed a blocking diode harness to prevent backfeed for the common indicator lamp.
I'm pretty sure the customer would be okay with connecting the convertor harness to the factory plug on the occasion he uses the trailer, but I'd really like to figure this out!

Any ideas?
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  #2  
Old February 5th, 2016, 11:47 AM
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You need to put in resistors in-line. At least in the front. I didn't need them when installing rear-only.
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  #3  
Old February 5th, 2016, 11:48 AM
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1 sounds like you are get back feed through the trailer converter. Bad converter design?

The trailer light relies on amount of power being used and you would probably need to add in a resistor to suck down power if you really wanted it....
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  #4  
Old February 5th, 2016, 02:15 PM
Roverlab
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Hmmm, resistors, yes, well, that sorted that out. Still, I wonder why the issue was only on the front lights?
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Old February 5th, 2016, 02:53 PM
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Quote:
Originally Posted by Roverlab View Post
Hmmm, resistors, yes, well, that sorted that out. Still, I wonder why the issue was only on the front lights?
Who knows. It's all shared somewhere. My front amber lights turned on for a while when I'd hit the brakes (I think that's what you're saying). Ended up being a bad headlight switch from what I remember.
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Old February 5th, 2016, 03:58 PM
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Applying the brakes with a turn signal on, would cause the opposite front turn signal to illuminate.
I guess the resistors also act as a blocking diode, affecting current flow. Admittedly, I had forgotten that this kit did not come with any resistors and it slipped my mind.....glad I had some laying around for another job and was able to prove it out!
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  #7  
Old February 5th, 2016, 04:10 PM
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The trailer converter is back-leaking voltage to the turn signals. The resistor drains that off enough that the LED can't turn on. LEDs need a minimum voltage to start lighting up. The front is just turning on a bit before the rear. You really need a trailer converter without leaking diodes....
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  #8  
Old February 5th, 2016, 09:05 PM
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On mine, there is a shared ground for the in dash indicator bulb...if you remove the bulb it worked fine...so then I added the resisters on the two front units and put the bulb back...everything good...
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  #9  
Old February 5th, 2016, 09:17 PM
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Quote:
Originally Posted by icnsltmfg View Post
On mine, there is a shared ground for the in dash indicator bulb...if you remove the bulb it worked fine...so then I added the resisters on the two front units and put the bulb back...everything good...
The normal indicator light is connected to the power supply for each light and not to ground. When one side is powered, the indicator light grounds out through the other side. The problem is an LED should not leak through current, so the indicator light can't work properly.
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  #10  
Old February 5th, 2016, 09:42 PM
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You are correct..the power side

Quote:
Originally Posted by Red90 View Post
The normal indicator light is connected to the power supply for each light and not to ground. When one side is powered, the indicator light grounds out through the other side. The problem is an LED should not leak through current, so the indicator light can't work properly.
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