Car led strip

[konradgabi]

View attachment 50021

 

[Spoon]

The way you have shown on the wiring diagram, the relay will always be energised. So basically you have wired up the door switch directly to the LEDs.
Not sure about putting +12v onto the output of the LED controller.
I think this is where your original question of putting a diode at the output come from.

 

[konradgabi]

i think i will use this one. (diagram changed). in this case the relay is off until the door is open , i think so
sorry for keep asking your oppinion

 

[UNG]

i think i will use this one. (diagram changed). in this case the relay is off until the door is open , i think so View attachment 50023
sorry for keep asking your oppinion

In your diagram the relay is totally pointless as the load is still being switched by the door switch
The other one to check is the door switch in the positive or negative side of the load circuit or is the switch in the canbus

 

[konradgabi]

Actually I take (+&-) from bulb but the problem is that power flows backwards into led controller, please advice me if is Wright to use P6KE12A-B-LF Diode transil 600W 12V 36.5A unidirectional DO15 P6KE12A-B for stopping the current flow back
thanks

 

[konradgabi]

no one can help please ,