If only the headlight fails but indicators/horn work, check the headlight switch. If the entire lights fail, check the Red/Black wire after the ignition key.
| Wire Color | Abbreviation | Function | | :--- | :--- | :--- | | | R | Permanent Battery Positive (+) (Direct to fuse) | | Black | B | Ground / Negative (-) (Chassis earth) | | Red/Black | R/B | Switched Positive (After ignition key) | | Yellow | Y | AC output from stator to regulator (for charging) | | White | W | High beam output | | Blue | U | Low beam output | | Green | G | Neutral indicator / Ground for lights | | Light Green | Lg | Starter relay control / clutch switch | | Orange | O | Tail lamp / Position lamp | | Black/White | B/W | Ignition coil cutoff (kill switch circuit) | | Blue/White | U/W | CDI pickup coil signal | pulsar 135 ls wiring diagram
The is your roadmap to a reliable, trouble-free bike. Unlike modern motorcycles with CAN-bus systems that require dealer diagnostics, the P135 is an analog, serviceable machine. Understanding its color codes, circuits—especially the DC-CDI and twin-spark layout—empowers you to fix starting issues, lighting failures, and charging problems with a simple multimeter. If only the headlight fails but indicators/horn work,