And for an example of what they mean by "reworking how the indicator light works", this is more complicated, but actually might be the "correct" fix; different symptoms, similar cause:
https://www.customled.com/blogs/cust...d-turn-signals
Quote:
WHAT CAUSES THE 4-WAY BLINK PROBLEM?
This problem actually has nothing to do with the flasher relay on the motorcycle. A flasher relay can not cause, or fix this particular issue.
The problem stems from a lack of restive load (incandescent bulbs) on a blinker system that was designed for incandescent bulbs - however the best solution is actually NOT to add resistors. It is actually best to solve the problem at the source, which is the turn signal indicator lamp in the gauge cluster. The turn signal indicator lamp is the little light that blinks next to the speedometer when you are turning.
It is at the turn signal indicator lamp where both the left and right turn signal circuits are brought together. Left turn circuit on one side of the indicator lamp "filament" and right turn circuit on the other side. With the incandescent turn signal bulbs installed, the system behaves as designed where voltage on either the left or right turn signal circuits illuminates the turn signal indicator lamp. This is achieved simply by allowing the opposite side turn signal circuit from the one activated, to function as a ground path for the indicator lamp. The small amount of current that passes through the indicator lamp in the gauge cluster is not enough to illuminate the power-hungry incandescent bulbs, and they simply function as a ground path without lighting up at all. When removing these incandescent bulbs and installing LEDs, you have removed this ground path - which usually leaves the turn signal indicator lamp inoperative - AND you have introduced voltage to the opposite side turn signal circuit which is enough to illuminate the super efficient LEDs.
OK, SO HOW DO I FIX THE 4-WAY BLINK PROBLEM?
The pure solution to the 4-Way Blink Problem (not the simple one, but the correct solution) is to diode isolate the two turn signal circuits leading to the gauge cluster, and provide a dedicated ground for the indicator lamp.
This is done by finding these two turn signal circuit wires leading into the gauge cluster (typically the same wire colors as found at the blinker lamps themselves). Once you properly identify them in the harness leading to the gauge cluster, you cut them and install a Diode (1N4001) in each circuit (with the gray band towards the gauge cluster) on the two wires feeding power from the turn signal circuit. You will then combine the outputs of the diodes into one of the two wires leading into the gauge cluster, and ground the other wire going into the gauge cluster.
The diodes will keep electricity from being able to cross over from one turn signal circuit to the other, but it will allow the two circuits to be combined to power the indicator lamp properly.
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We all like diagrams, right?
Even though you don't have this exact issue, I
think this'd also fix the "dim indicator" issue - by providing a good path to ground for the bulb (or LED).