May I know the parts?

[sojiyoung]

Hello.
I'm watching "JVC-Kenwood."
The diagram has resistance and TR.
But I don't know the part number.
I'd like to know the part number.

-Note -
My car has three lines: SW1, SW2, and SWG.
The HU(keywood DMX9706S) has only one SWC line.
I think this project is right, so I'm going to try it.

[sojiyoung]

The parts I used are as follows.

Resistance 1 - 3.3kohm
Resistance 2 - 10kohm
Resistance 3 - 120ohm
Transister - NPN(2N3904)

I haven't made it work yet.

[h1aji]

Transistor have to be PN2222, 2N2222 or BC337
All been tested and works

[sojiyoung]

Thank you.