Reply To: Help with new wiring harness 2009 GT250r EFI Fuel injected model
At 3o seconds in:
The three plugs i see are for the main harness
The headlights are connected the right way on that “mini pig-tail” harness. So it just needs to join the big harness on the bike.
The red bullet single wire , also matches the female side of the harness.
3-pin plug = speed sensor (the flat one)
3 pin plug = lights (triangle shaped) => frame harness feeds it.
2 pin plug = Parking Light inside the top eye-ball of the bike.
So in this case:
Verify that the Triangle 3-pIn plug and 2Pin plug have 12v coming out of them.
Remember = RIGHT SWITCH GEAR turns the Headlights ON or OFF (h1 and h3 bulbs)
The parking light (2 pin plug) is ALWAYS on regardless.
The LEFT switch gear will also control the headlights too (They work together with the right switch). Left Switch just toggles between Low or High Beam.
Around 2:00 mark , you pulled out a 2 pin plug , now i am a little lost as i can’t remember where it connects to! – I would “assume” it is for either the airbox sensor or a diode along the harness but…the colour “black/yellow” at the front usually means ignition coil!
Check the wiring diagram for the ECU Connectors for that same “black/yellow” wire and where it goes? I have not seen that on the UK customer bikes i fix, so that’s puzzled me not unless , Hyosung has a funny habit of changing wire colours mid-cycle (they always do!)
Or it may be for the “EGR/AIS” (electric air valve) that takes air from airbox and dumps it to the cylinders near the exhaust pipes but i doubt it!
I can see the manual saying “BY” (Black/Yellow)” with no name to it , it must be left blank itentionally
Can you find a BY on the ECU side and follow the diagram to see where they end up?
I hope @syco (Simon) chimes in! 🧠 I’m having a weird brain fog at the moment