Technical Problems with the front and rear left turn signals. Only with the car running.

[DragonHeart6]

Hi, I'm having a strange problem: The front and rear left turn signals don't work. (The center side indicator works fine.) They all work when the car is off. When the car is on, they only flash once each time they're activated. From emergency button and indicator lever nothing changes.
Plese somebody help me with suggestions

 

[aschiuta]

Hi, I'm having a strange problem: The front and rear left turn signals don't work. (The center side indicator works fine.) They all work when the car is off. When the car is on, they only flash once each time they're activated. From emergency button and indicator lever nothing changes.
Plese somebody help me with suggestions

What is the voltage on battery with key on engine off and with engine on?

 

[DragonHeart6]

What is the voltage on battery with key on engine off and with engine on?

I have a new battery. However, my OBD reports about 12.7v with the car off and 13.7 with the car on.

 

[aschiuta]

This is the schematics. You must check the lamps and the wires/contacts on both front and rear clusters.
May be there is a slight shortcircuit between the wires or the lamps are others type and body computer M1 will activate the protection.

 

[DragonHeart6]

This is the schematics. You must check the lamps and the wires/contacts on both front and rear clusters.
May be there is a slight shortcircuit between the wires or the lamps are others type and body computer M1 will activate the protection.

Thanks so much, I think I figured out the cause:
I recently installed new LED turn signals (rear) (but they were already LEDs before). These LEDs cause the standard front turn signals to go out.
Now how do I know if they're using less or more power?
Now I find myself in this situation: the front and rear turn signals go out with the car running (original front bulbs, new rear LEDs).
Another clue: the instrument panel reports a problem with the turn signals "due to the non-original rear LEDs." But if I disconnect an original front bulb, the rear one works again
With the old LED indicators everything works again, but I'd like to keep these new ones, which are much brighter.

New LEDs specs: (1156 BA15S / P21W)

 

[aschiuta]

The brighter the LED, the more current it draws.
When the engine is off, the voltage on the battery is 12.5 volts and the original bulb and LED draw less current than when the engine is on, 14 volts on the battery and the current is above the protection limit of the body computer. You risk damaging the computer and it will cost you a lot.