2001 KDX Voltage Regulator, How To Test

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winkel
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2001 KDX Voltage Regulator, How To Test

Post by winkel »

Greetings folks,

My son and I each have KDX's. His is a 2001 and mine is a 2005.

His lights quit working and I've been trying to trouble shoot the problem.

I have 30 to 50 volts AC to and through the switch. I have 30 to 50 volts AC to the voltage regulator under the seat so the stator is fine. I don't have any voltage to the supply to the headlight.

I haven't checked voltage out of the regulator yet because it has the funny connector and I haven't figured up a good jumper to hook into one side and check what's coming out.

How do I check the regulator? I checked for resistance through it but it just shows open. I checked on the resistance setting and I also checked on the diode setting.

Before I completely cut the wiring harness open, does anyone have any ideas?

I checked the regulator on my bike as well, the lights work fine, but it shows the same thing when checking resistance and the diode check.

Thanks,
Winkel
ecojbr
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2001 KDX Voltage Regulator, How To Test

Post by ecojbr »

Sounds silly but test\swap switches. They are notorious for clicking but not switching.
04 kx220 hybrid
03 kx 250
05 kdx 200
winkel
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Re: 2001 KDX Voltage Regulator, How To Test

Post by winkel »

I checked voltage coming back from the switch. It is working. I didn't think about it until later, but I need to swap voltage regulators and see if that makes a difference.
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Jaguar
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Re: 2001 KDX Voltage Regulator, How To Test

Post by Jaguar »

you test voltage at wires by inserting a needle through the insulation at a slight angle into the wires till it touches the metal and then connect your voltmeter to the needles
Performance CDI -- KDX motocross mods -- the SR KDX -- expansion chamber analysis---> http://www.dragonfly75.com/moto/
winkel
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Re: 2001 KDX Voltage Regulator, How To Test

Post by winkel »

Well, it appears to be his voltage regulator. I pulled the feed to his tail light and tested there. With the voltage regulator plugged in, it is showing about 3 volts AC. With it unplugged, it shows 30-50 volts AC.
On my bike, with the voltage regulator plugged in, it shows 9-15 volts AC. Unplugged, it shows 30-50 volts AC.
Is there a generic voltage regulator available? I don't want to spend $90 on one!
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