Blocking diodes for control lamps

If, after replacing the turn signal or headlight bulbs with Led bulbs, all 4 turn signals flash at once or the fade up and fade function of the headlight bulb does not work correctly, then the cause is usually a return current at the turn signal or the high beam control light. The problem is quickly solved with this blocking diode. After soldering the blocking diode into the plus and minus line of the turn signal or high-beam indicator light, the error is corrected. The blocking diodes ensure that the current can only flow in one direction and is blocked in the other direction (silver-locked / black-open).