Lighting wiring help needed

[skinl19]

I recently bought a 2002 200 and the lights weren't working. I'm starting to track down the problem and this is where I'm at and open to suggestions. Electrical stuff I know little about. Mechanical things I'm OK. Somewhere in the bike's life it was titled as a street legal bike and someone (not the PO) installed a led headlight and a dual filament tail light but while both test OK for continuity, neither light up.There is no rectifier or battery, nor is there a brake light switch at either end. I tested the yellow wire out of the lighting coil at around 12v at idle. The light switch also checks out for continuity when testing both leads. Following the wiring diagram it looks like things are connected to the correct colors. Should I test the output after the regulator? Would this be the brown wire?

[bufftester]

The diagram below is the OEM layout. No battery or rectifier, just a regulator that should clamp everything below 14V, not unusual to see under 12V at idle. Without a rectifier and battery the LED lights will flicker at low RPM, though some LEDs are pickier than others. Keep in mind that you're actually measuring AC voltage, not DC. The brown wire from the regulator connects to the red wire downstream from the headlight switch. You'll need to check at each splice as well.

KDX Wiring.jpg (118.8 KiB) Viewed 1970 times

[skinl19]

Thanks, I have been using the wiring diagram to verify connections are correct. I see a lot of electrical tape on the harness so who knows what was done underneath. I did verify that the headlight was working via an independent charger. Do I just check each connection with the positive probe on the red connection and ground the positive? Same for the brown wire out of the regulator?