All 2st Can't get my lights to work

I'm gonna need lights on my '04 Wr250 for the next enduro so I plugged in the regulator and the bulbs but got nothing!

Got any tips to troubleshoot it?

Check the bulb and then look for loose connections or a bad ground. If that all checks out then test your stator. They can and will go bad.

I just rebuilt the bottom end.

How do I check the stator?

hopefully without removing it again!

Thanks

Before you do anything check the yellow wire leaving the rectifier on the frame downtube. If that's getting power the the problem is at the light

Do you also have a taillight? Is it dead too?

yes the taillight is dead and my headlight has 2 bulbs....neither work

I'll check the regulator wire for voltage.

I guess the stator is supposed to have a certain resistance...ie not shorted or open to ground?

I've got a spare stator at home. When I get home I'll measure the coil resistances and post them.

The harness has an "eye" terminal that has to be terminated at the frame. Make sure it is...

The WSM doesn't give the coil resistances but my DMM indicates that the lighting coil is a few 10ths of an ohm, and the pick-up is ~125 ohms. BTW, The yellow to frame voltage should be between 20 - 50 volts with the regulator disconnected.

consult ETM for schematic, then:

step one- check for power and ground.
if ok- got to setp two.
if not ok- back probe untill problem wire/terminal/mix up/ground fault is found.

step two- replace bulb

I got 1.5 vdc from the stator yellow to regulator wire and ground at idle. Can't be good huh?

The motor was rebuilt twice at least, so the stator has been handled.

It worked great 2 rebuilds ago.

BTW, my new 2010 took a dump so I'm ready to race on my old Wr250 this weekend.

Since (I'm assuming in this case) your bike has a regulator and not a regulator/rectifier the voltage will is AC not DC. Switch to AC mode on your DMM and check again.