Wiring Method:
Set of 4 wires:
1. Connect +12V power supply with red line.
2. Connect headlight switch + 12V with white wire.
3. Connect the ignition switch with yellow wire.
4. Connect the battery or car shell with the black wire.
Set of 2 wires:
1. Green wire connects turbo boost sensor line.
2. The black wire connects the ground wire.
(The last wire is an extra wire for connecting similar items. )
Back Socket Description:
1. 2 pin socket link to external warning light(This item does not include warning light)
2. 3-pin socket fits signal line
3. 4 pin socket is for battery connection.(If there are 2 4 pins, just select one to connect the power supply, the rest of the socket is ready for other similar items without having to link the power again.