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Posting this in the electrical forum looking for help.
I ordered the Custom Dynamics LED lights for my brake light and turn signals. The brake light went in without issue. Here's the process I followed for the turn signals.
1. Removed both front turn signal bulbs and installed the amber LED boards.
2. Turned on the turn signals and both blinked fine. Just fast after the 2nd blink because I had not installed the Slimline Signal Stabilizer yet.
3. Removed both rear turn signals and installed the red LED boards.
4. The right turn signal works fine. The left turn signal would not turn on.
5. I swapped out the rear turn signals and the problem remained on the left side which means both turn signals are good. The left would still not blink.
6. I removed the left rear LED board and replaced it with the bulb and it worked fine.
I figured maybe it had something to do with the Signal Stabilizer so I installed that and the problem remained. I'm wondering if I'm doing something wrong. In the left rear, the original bulb works but the LED board will not.
LED's are polarity sensitive.
Check the polarity!
I had reversed leads from the factory when installing one of my LED spots.
OP said bolt bulbs worked on one side, but neither worked on the other.
So it's a socket issue. Could be reversed polarity on Harley's end, but not likely. Unless OP replaced the lights and reversed it.
The bike has the stock lights so I don't think it was ever rewired. I received an email back from Custom Dynamics and they said it was a reverse polarity issue. I'm going to try reversing the wires and see if that works.
Check that your ground is good. Just had the same problem with my right front CD led signals. Turned out that I had lost a ground. Re-grounded and back in business.
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