No Charge....

[trbig]

I have no charge from my alternator. I don't know if it's the stator or the regulator. I read the tech tip on checking the regulator, but what is a field coil connecting clip?

leave the volt meter hooked up across the battery to check charging voltage. Unhook the field coil connector clip from behind the fuse panel. Hook a ground to one wire of the field coil. Jumper the positive side of the battery and get the other end of the jumper ready to provide current to the field coil at the clip. Start the bike and read the voltage. Now touch the remaining wire of the field coil and observe the voltage response across the battery.

I see I need to make a little jumper wire for it, and using the volt meter on the battery... got that part. I connect one of the wires to ground with another jumper, but not quite sure what it's telling me to do with the positive jumper from the battery. And how long do I have to check this before things on the bike start shorting out? Any pics would be great!

The other thing I wanted to ask is... I only found one regulator for the XJ 1100. I saw several from XJ750's Are they interchangeable?

Thanks guys.

Tod

[TopCatGr58]

Here's a little info: No Charge!

82XJ1100: 10M-81960-A0-00 RECTIFIER & REGULATOR ASS'Y

81SH: 1T4-81960-92-00 RECTIFIER REGULATOR ASS'Y

79SF: 1T4-81960-92-00 RECTIFIER & REGULATOR ASS'Y

XJ750J: 12R-81960-A1-00 RECTIFIER & REGULATOR ASS'Y
(4H7-81960-50-00)

The numbers for the XJ and the XS are different, "we" realize that it's a different style of charging system, XS brushless, XJ=brushes,
I also thought the XJ put out more amps, and so the REG/RECT may have different controlling values than the XS's, but Tod was wondering if he can use an XS11 REG/RECT on his hybrid XS/XJ, his bike has ALL XJ Electronics!?!?

GEEZER, are you out there, can he use an XS R/R on his XJ?
T.C.

[trbig]

From all those numbers TC, it would appear that it won't.. which is what I expected. the XJ750 rectifier is about half price of the 1100's.

I still need some3 help on the checking the reg/rec. It's clear as mud to me.

Tod

[trbig]

Its been a couple days now. Does anybody know how to check the regulator? I am not understanding the tech tip.

Tod

[Geezer]

Re: Here's a little info: No Charge!

Originally posted by TopCatGr58
GEEZER, are you out there, can he use an XS R/R on his XJ?
T.C.

The reg/rec unit it the same but they changed the plugs for some unknown reason.

You can cut the plugs off the XS unit and graft on the ones from a XJ and they match wire for wire.

When I sell a unit for some one with a XJ I offer to throw in a matching pair of plugs to chage the harness or I leave the plugs off so the user can install what they want.

Geezer

[trbig]

Thanks Geezer.... BUT HOW DO YOU CHECK THEM!?!?? lol..


I don't know if my problem is the rectifier/regulator, or the stator... or what. I just know that it's not charging. Would like to find out what it is without replacing everything.

Tod

[Geezer]

First off you will need a volt/ohm meter. Take 20 bucks down to your local Radio Shed and get the analog meter that's just under 20 bucks. You could get a digital meter but I think analog meters are easier to use for bike stuff.

With the meter in hand, unplug the wires from the alternator. There should be about an ohm resistance between the white wires and infinite to ground.

Next test the resistance between the green and brown wires from the alternator. This is for the field coil and should be around 5 ohms. I don't have my manual on had at the moment but these numbers should be very close.

Assuming you've gotten good news from the previous 2 tests, make sure the terminals are clean and plug the connectors back together. Turn the ignition on but do not start the engine yet. Place a .002" feeler gauge flat against the center of the alternator cover. If it is magnetically attracted to the cover, you're half way there.

Fire up the engine, put the volt meter on 25 volts DC, insert the positive probe of the meter into the back of the plug on the reg/rec unit (still plugged in) and the negative probe to ground. Rev the engine and you should see the voltage rise to around 15 volts at about 4000 RPM.

If it’s not charging at this point, the regulator is probably good but the rectifier is probably bad. Unplug both plugs to the reg/rec, set the meter to ohms x1, touch the positive lead of the meter to the red wire and the negative probe to each of the white wires. At this point you will either get continuity or not but it should be the same on all 3 white wires. Reverse the test leads and do the test again and now you should get the opposite results but again the same on all 3 white wires. Now you’re half done, do these to test with the black and white wires.

I can do all this in about 15 minutes. It takes much longer to explain than to do…

Geezer

[GNEPIG]

.. great explanation Tony, i really like the part about the feeler gauge, i will be trying that one tomorrow

this is a great site, helpful people and lots of knowledge
.it's cool to learn new things

[trbig]

Thanks GNEPIG

Here's what I have so far... I had the volt meter already..

With the meter in hand, unplug the wires from the alternator. There should be about an ohm resistance between the white wires and infinite to ground.

I had .8 ohm between all the wires, AND .8 ohms to ground.

Next test the resistance between the green and brown wires from the alternator. This is for the field coil and should be around 5 ohms. I don't have my manual on had at the moment but these numbers should be very close.

I had 9 ohms

Turn the ignition on but do not start the engine yet. Place a .002" feeler gauge flat against the center of the alternator cover. If it is magnetically attracted to the cover, you're half way there.

All I had was the .04mm feeler, but it magnetized great.

Fire up the engine, put the volt meter on 25 volts DC, insert the positive probe of the meter into the back of the plug on the reg/rec unit (still plugged in) and the negative probe to ground. Rev the engine and you should see the voltage rise to around 15 volts at about 4000 RPM.

In the back of WHICH plug (There are 2) and which wire?? Didn't try because I don't want to short out the wrong thing.

Tod

[GNEPIG]

.. well you can stop now, according to your readings your stator is shorting out

I had .8 ohm between all the wires, AND .8 ohms to ground

.8 ohms to ground means a short

[skids]

Before you condemn the stator, see if the meter reads zero ohms when testing itself with the lead wires touching.

Originally posted by GNEPIG
.. well you can stop now, according to your readings your stator is shorting out

.8 ohms to ground means a short

[GNEPIG]

.. yeah, what skids has said, your meter ohms should not be more than .2- or was it .02, i will have to look now.

[trbig]

Yup... I make sure the gauge zeros every time before I test something.
OK Guys.. I have a stator I'm bidding on in Ebay, so leave it alone! I figured it was going to be the regulator since it's the more expensive part.
Could you go ahead and give me the rest of the directions I was asking for on testing the reg/ rect though... or does the stator have to be good to test it? If it's bad too... I wanna get it on the way also.

Thanks a bunch GNEPIG


Tod

[skids]

It is too bad if you need a stator. There are no moving parts to wear out there. I suppose the insulation could break down or something. I would try and get a stator that is bolted to the case cover. The reason is to help protect it during shipping. It seems like the usual spot for trouble is that big plastic connector beneath the fuse panel. When the connectors get corosion, they begin to get HOT and can burn the thing to a CRISP, well, almost!

Originally posted by trbig
Yup... I make sure the gauge zeros every time before I test something.
OK Guys.. I have a stator I'm bidding on in Ebay, so leave it alone! I figured it was going to be the regulator since it's the more expensive part.
Could you go ahead and give me the rest of the directions I was asking for on testing the reg/ rect though... or does the stator have to be good to test it? If it's bad too... I wanna get it on the way also.

Thanks a bunch GNEPIG


Tod

[GNEPIG]

.. Thanx to Geezer, i'm just the loud mouth in the middle