GTI L4-2.0L Turbo (BPY) (2007)
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Part 3
Circuit and Terminal Designations
Several wiring circuits in the vehicle's electrical system are identified with a number or letter designation. These circuits are identified the same in all
wiring diagrams and are most commonly shown near the top of each page in the fuse/relay panel portion of the wiring diagram. The circuit designations
may also be used to identify switch connector terminals (switch circuits). Following are the most common numbered/lettered circuits:
Terminal (circuit) 1
Ignition distributor low voltage (typically used as an Engine Speed (RPM) signal for the tachometer)