Wira Wiring Diagram ((install)) - Proton

This is the biggest hurdle. The diagram might show a clean line, but in a 20+ year old Proton Wira:

The Electronic Control Unit (ECU) acts as the brain of the vehicle, managing fuel injection and sensor signals. The Siemens VDO EMS400 system is common in post-2001 models. proton wira wiring diagram