Common troubleshooting for LED turn signal light bulbs

You can take a look at these LED bulbs under LED turn signal lights

What’s the difference between conventional pin configuration vs. the special SRCK LED bulb?

3157 Conventional Socket

3157 SRCK Socket

For 1156/1157/7507 bulb, in case the stock socket’s wiring are reverse, how to correct this

For 3157 or 7443 LED bulbs, in case the Dim mode and Bright mode are reversed, how to correct this without reversing the stock harness

For LED turn signal lights, add load resistors