Why connect each diode to a separate resistor?

Question

Electronics

Recently, the marker lights stopped working in my car, although I bought it six months ago, opened it, and there all the resistors rusted, break off when touched with tweezers. I want to solder, but the question arose, why are there so many resistors, why not just connect them all in parallel, using one resistor at the input?

G - side light
P - turn signal
З - grounding

Answer 1

1 With a slight increase in current through the LED, its operating time is reduced.
2 When connected in parallel, the direct current will be unevenly distributed between the diodes (since different diodes have different resistance).
3 The diode with the lowest resistance will carry the most current in the forward direction. And in certain circumstances, this excess can be critical and a breakdown of the diode will occur.
4 This will increase the current through the other LEDs. Which will lead to the failure of the next diode and so on.

Answer 2

If you turn on all the diodes in parallel through one resistor, then the current limited by the resistor will be divided between all the included diodes. Those. the brightness will float depending on the number of diodes on.

Answer 3

To keep the LEDs from burning out

Answer 4

I had to meet a serial connection of several LEDs to one resistor