Electrical Issue: Headlights [help] By richx1 (Read 411 times)

[richx1]

Having the following issue with my GY6 Scoot:

Headlights and Plate light not working when Engine on and running.

I have pulled most of the cowling and have looked at all wires and collections and see them to be in good shape. I unplugged and plugged back in all connections.

I have unplugged the rear lights 5 pin connector and measured VDC to ground: 100 mV.

Tested Vac off the stator and seeing Yellow-ground of about 15-20, White-ground of about 20-25.

I have tested Resistance across the rectifier. Infinity across all while set to Kilo. I have a back up rectifier that I also tried with no luck, and tested it the same and found Green-Red resistance on this one to be 3.4 MOhm, while the rest were infinity.

I tested yellow wire from rectifier to rear 5 pin to be good.

Scooter is running fine mechanically... just missing the Headlights and Plate Light.

Am I looking at a pair of bad rectifiers?

Thanks,
Richard

[cyborg]

Could be the hi lo beam switch on the bars

[richx1]

Mar 19, 2017 13:07:04 GMT -6 cyborg said:

Could be the hi lo beam switch on the bars

I tested that too... continuity correct for each side of the switch when toggled.

-Richard

[willemjjbotha]

Why can't you connect it on direct power through your lights switch? Remove it from the stator. Sorry if this question is stupid.

[richx1]

Mar 25, 2017 14:06:40 GMT -6 willemjjbotha said:

Why can't you connect it on direct power through your lights switch? Remove it from the stator. Sorry if this question is stupid.

DC system is always on and only 12v. I would need to wire in a switch and convert it to a 12v light.

Easier to continue to diagnose it. I think I might have a lead on the issue... a grounded wire in the turn signal cowling.

Starting tomorrow I'll be isolating the headlights by removing all other bulbs from the system and go from there...

[cyborg]

Rubbed thru wires can definitely cause problems