PRINCIPLES
The question arises a lot, " what is the wire colour for fuel pump in a 1975 ????? ??????". Without remembering the wire colour of every wire in every car, you can still fit a vehicle security system by understanding the principles of deciphering what wires do. The following table gives you generic instructions on how to find what you need.
| SUPPLIES | SIGNALS | TRIGGER | IMMOBILISATION |
| Negative door switch | Central locking | Starter | |
| Positive door switch | Negative horn | Main ignition | |
| Negative boot switch | Positive horn | Fuel pump | |
| Positive boot switch | Indicators | Fuel injection | |
SENSORS | |||
| Ultrasonic Sensor | Microwave Sensor | Glass Breakage Sensor | Shock Sensor |
CENTRAL LOCKING CONNECTION | |||
| Negative (low current) | Negative (high current) | Positive (high and low current) | |