Planet Minis

fatcaaat · 06-27-2009, 09:03 PM

Is there any way to test a rectifier to see if it is working properly? I found out why my battery kept dying..it was receiving 26 volts! I swapped out a rectifier and it went back to a normal 9 to the battery but the hot to the lights is registering a -3 at idle to -17 which obviously isn't right.

FastMC · 06-28-2009, 01:25 AM

Here is the test for the Honda style regulator/rectifier. Not sure if this is what you have or not. Disregard the scale in ohms, your meter may read differently than what they have. When I run the test on a known good reg/rect, my meter reads megohms. As long as you're getting a resistance value where you should be and reading infinity where it says you should be then the units ok. Note: the left side of the graph is for your positive probe and the right side is the neg probe.
Depending on how you have it wired these things are easy to fry (especially the Chinese ones).

Testing a Rectifier...How to?-reg-rect-test.gif

fatcaaat · 06-28-2009, 09:59 AM

Thanks. Unfortunately, the chinese version I have checks out fine with that setup but still throws -3.0V to -19V when revved off the yellow line. I then put my Honda one on and the same thing. So then, I took an inline regulator and hooked it up, and took the power directly from the motor...SAME THING! I'm starting to think that this GPX stator doesn't do things right. I may swap in the Honda CT70 version I have and see what's up.

FastMC · 06-28-2009, 06:41 PM

Did you check the AC out from the stator ?

06-27-2009, 09:03 PM	#1 (permalink)
fatcaaat 3rd Gear Member Join Date: Sep 2004 Location: Arlington, VA Posts: 3,776	Testing a Rectifier...How to? Is there any way to test a rectifier to see if it is working properly? I found out why my battery kept dying..it was receiving 26 volts! I swapped out a rectifier and it went back to a normal 9 to the battery but the hot to the lights is registering a -3 at idle to -17 which obviously isn't right.

06-28-2009, 01:25 AM	#2 (permalink)
FastMC Sporting the Merkin Join Date: Mar 2004 Location: boston area Posts: 5,061 My Mood:	Re: Testing a Rectifier...How to? Here is the test for the Honda style regulator/rectifier. Not sure if this is what you have or not. Disregard the scale in ohms, your meter may read differently than what they have. When I run the test on a known good reg/rect, my meter reads megohms. As long as you're getting a resistance value where you should be and reading infinity where it says you should be then the units ok. Note: the left side of the graph is for your positive probe and the right side is the neg probe. Depending on how you have it wired these things are easy to fry (especially the Chinese ones).

06-28-2009, 09:59 AM	#3 (permalink)
fatcaaat 3rd Gear Member Join Date: Sep 2004 Location: Arlington, VA Posts: 3,776	Re: Testing a Rectifier...How to? Thanks. Unfortunately, the chinese version I have checks out fine with that setup but still throws -3.0V to -19V when revved off the yellow line. I then put my Honda one on and the same thing. So then, I took an inline regulator and hooked it up, and took the power directly from the motor...SAME THING! I'm starting to think that this GPX stator doesn't do things right. I may swap in the Honda CT70 version I have and see what's up.

06-28-2009, 06:41 PM	#4 (permalink)
FastMC Sporting the Merkin Join Date: Mar 2004 Location: boston area Posts: 5,061 My Mood:	Re: Testing a Rectifier...How to? Did you check the AC out from the stator ?

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