Author Topic: Battery Charging Issues: '81 V1000 G5  (Read 27054 times)

Offline Groover

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Re: Battery Charging Issues: '81 V1000 G5
« Reply #30 on: August 21, 2014, 09:35:06 AM »
And the results are in.....

(All wires disconnected)

DF to Chassis = 14.6 Ohms
Y to Chassis = Open
- to Chassis = .4 Ohms

Y to DF = Open
Y to - = Open

DF to Y = Open
DF to - = 13.6 Ohms

Front slip ring to Rear slip ring = 3.2 Ohms
Front slip ring to chassis = 12.6 Ohms
Rear slip ring to chassis = 9.6 Ohms

So that was that test, then I swapped the two wires in question (the Y to the -) and voila'... there it was charging the battery! Go figure! I wish I would have posted a photo of the alternator earlier in the week. I would have saved myself and your guys' time too!

The battery was charging properly and the light on the dash would fully go out with just a blip to the throttle. I then, just out of curiosity put the blue wire from the dash bulb on its own and put the red with the other reds on the spade, and the results were the same, that being the battery charged just fine, so apparently that didn’t matter in the big scheme of things.

As far as the brushes go.. I did this last night, and the lighting in my garage is pretty sad. I used a flashlight too, and they looked just gray in color and looked pretty old.

So now I have these new parts that came it and they look great I must say.... so I've decided that I'm going to upgrade them anyway because who knows what sort of damage happened with this incorrect wiring, plus at one point last weekend the charge light would stay on solidly, but then it went back to being dim, so I'm not sure what that was all about. Long story short, my bike has 45K on it, I know little history on it, I think putting $240 into the entire electrical/alternator/charging circuit refresh is reasonable for at least a piece of mind.

Though, no rush now in that work since it's working now ;) and for the first time ever I can ride my bike further than a battery’s full charge this weekend!

All this work for a silly swapped wire… At least I know now where all the connectors are on this bike, I know they are now all clean and I do now have a pretty good understanding of this bikes electrical system whereas it was a big mystery to me just a week ago.

Thanks to both of you for all your help. I'll likely post the readings with the new parts just as comparison material for other's (and my own) future reference. That might be a week of two away.

Thank you!  :bow


« Last Edit: August 21, 2014, 09:39:21 AM by Groover »
1981 Moto Guzzi V1000G5
1987 Moto Guzzi LM1000SE, a
1987 Moto Guzzi LM1000SE, b
1980 Piaggio Vespa P200E
1980 Piaggio Vespa P125X
1980 Vespa Grande Moped
1980 Vespa SI Moped
http://scooteropolis.com/

Offline twhitaker

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Re: Battery Charging Issues: '81 V1000 G5
« Reply #31 on: August 21, 2014, 09:48:17 AM »
Sounds like you are ready for that twofer.  ;-T
'96 California 1100i 160,000 mi
'97 Centauro yellow 25,000 mi
'02 Champagne V11 LeMans 58,000 mi
MGNOC-11168
Dayton, OH

Offline Groover

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Re: Battery Charging Issues: '81 V1000 G5
« Reply #32 on: August 21, 2014, 09:48:25 AM »
On a separate note.. The light blue wire hardly reaches the Y wire where it needs to be. I can see how someone may have accidentally swapped these wires thinking the light blue wire connected to the - connector.

Why someone was down there in the first place?... I suspect perhaps there was a problem, maybe with the original Rectifier so they may have started testing stuff and mistakenly plugged in stuff in the wrong place.

Also... do you guys know the best way to pop off the rotor? I ordered the tool to pop it off, but I need to stop the crank from turning when loosening the main 5mm Allen bolt. Should I put it in gear and try? Also, is the bolt thread reverse or normal thread?
« Last Edit: August 21, 2014, 09:50:43 AM by Groover »
1981 Moto Guzzi V1000G5
1987 Moto Guzzi LM1000SE, a
1987 Moto Guzzi LM1000SE, b
1980 Piaggio Vespa P200E
1980 Piaggio Vespa P125X
1980 Vespa Grande Moped
1980 Vespa SI Moped
http://scooteropolis.com/

Offline Groover

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Re: Battery Charging Issues: '81 V1000 G5
« Reply #33 on: August 21, 2014, 09:50:51 AM »
Sounds like you are ready for that twofer.  ;-T

It is starting to look that way!
1981 Moto Guzzi V1000G5
1987 Moto Guzzi LM1000SE, a
1987 Moto Guzzi LM1000SE, b
1980 Piaggio Vespa P200E
1980 Piaggio Vespa P125X
1980 Vespa Grande Moped
1980 Vespa SI Moped
http://scooteropolis.com/

Offline twhitaker

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Re: Battery Charging Issues: '81 V1000 G5
« Reply #34 on: August 21, 2014, 09:55:23 AM »
It's a right handed thread. Should come loose if you smack the allen wrench with a mallet. Putting the tranny in gear if the screw is stubborn will hold it.

The screw has a turned down section under the head to clear the threaded portion of the rotor. Again the impact on the allen wrench should knock the rotor loose.
'96 California 1100i 160,000 mi
'97 Centauro yellow 25,000 mi
'02 Champagne V11 LeMans 58,000 mi
MGNOC-11168
Dayton, OH

Offline Groover

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Re: Battery Charging Issues: '81 V1000 G5
« Reply #35 on: August 21, 2014, 11:08:30 AM »
Ok, thanks for confirming that thread direction. Best to know these things before hand!
1981 Moto Guzzi V1000G5
1987 Moto Guzzi LM1000SE, a
1987 Moto Guzzi LM1000SE, b
1980 Piaggio Vespa P200E
1980 Piaggio Vespa P125X
1980 Vespa Grande Moped
1980 Vespa SI Moped
http://scooteropolis.com/

Offline Groover

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Re: Battery Charging Issues: '81 V1000 G5
« Reply #36 on: September 04, 2014, 07:27:51 AM »
I'm losing my mind with this project. I got the new parts in, felt like I did a top notch job with soldering and all that, but in the end I am back to square one. Now I have no charging to the battery and a permanent bright red light on the dash. What I have done to test so far to reverse it; I put/tested the old regulator and rectifier back on, mine as well as the ones Charlie send me, no difference. I called the company where I got the parts (linked above) and I asked them to assist me in testing the new rotor and new stator over the phone, and all checked out Ok. They think I have a short somewhere, which tells me I should have listened to Charlie in getting the new wiring for the charging circuit. I didn't, so I'm back to testing this to really isolate things, and I'll probably just replace the entire wiring on this bike since it seems rattled with electrical issues. This is how I plan on testing the charging circuit. All wires will be just jumper wires, outside the current loom.

Is this test diagram wired correctly for the real test? (I'll probably be doing that tonight)



I have so many hours into this project it's not even funny anymore, though I have replaced coils and done other work in the process. I'm just ready for some closure this charging system  **C

Thanks again for the assistance.
« Last Edit: September 04, 2014, 07:38:15 AM by Groover »
1981 Moto Guzzi V1000G5
1987 Moto Guzzi LM1000SE, a
1987 Moto Guzzi LM1000SE, b
1980 Piaggio Vespa P200E
1980 Piaggio Vespa P125X
1980 Vespa Grande Moped
1980 Vespa SI Moped
http://scooteropolis.com/

Offline twhitaker

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Re: Battery Charging Issues: '81 V1000 G5
« Reply #37 on: September 04, 2014, 08:06:09 AM »
There were a couple G5's at the Ohio Rally last weekend. If you look at the pics the black one with the bikini fairing, it's a very nice example.

Where abouts in Ohio are you located?
'96 California 1100i 160,000 mi
'97 Centauro yellow 25,000 mi
'02 Champagne V11 LeMans 58,000 mi
MGNOC-11168
Dayton, OH

Offline Groover

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Re: Battery Charging Issues: '81 V1000 G5
« Reply #38 on: September 04, 2014, 08:36:54 AM »
Wish I could have made it. My bike just wasn't ready for the journey, so home we stayed. I'm in Columbus. I'll can't seem to find the link to the rally. I want to see!
1981 Moto Guzzi V1000G5
1987 Moto Guzzi LM1000SE, a
1987 Moto Guzzi LM1000SE, b
1980 Piaggio Vespa P200E
1980 Piaggio Vespa P125X
1980 Vespa Grande Moped
1980 Vespa SI Moped
http://scooteropolis.com/

Offline twhitaker

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Re: Battery Charging Issues: '81 V1000 G5
« Reply #39 on: September 04, 2014, 08:44:26 AM »
« Last Edit: September 04, 2014, 08:48:48 AM by twhitaker »
'96 California 1100i 160,000 mi
'97 Centauro yellow 25,000 mi
'02 Champagne V11 LeMans 58,000 mi
MGNOC-11168
Dayton, OH

Offline Groover

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Re: Battery Charging Issues: '81 V1000 G5
« Reply #40 on: September 04, 2014, 08:52:53 AM »
Nice, that does look good. I always wondered what a Lemans style fairing would look like on that bike. Looks like they tied it in nicely with the matching pin striping and all. Looks like a great time (other than the rain), and I try next year. Those brownies look great! Thanks for the link.

 ;-T
1981 Moto Guzzi V1000G5
1987 Moto Guzzi LM1000SE, a
1987 Moto Guzzi LM1000SE, b
1980 Piaggio Vespa P200E
1980 Piaggio Vespa P125X
1980 Vespa Grande Moped
1980 Vespa SI Moped
http://scooteropolis.com/

Offline twhitaker

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Re: Battery Charging Issues: '81 V1000 G5
« Reply #41 on: September 04, 2014, 09:01:57 AM »
Quite a few opted for the 4 wheel transportation this year. What's a little bit of rain? Seemed like we were riding through Katrina Sunday morning.
'96 California 1100i 160,000 mi
'97 Centauro yellow 25,000 mi
'02 Champagne V11 LeMans 58,000 mi
MGNOC-11168
Dayton, OH

Offline Groover

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Re: Battery Charging Issues: '81 V1000 G5
« Reply #42 on: September 04, 2014, 09:12:17 AM »
Quite a few opted for the 4 wheel transportation this year. What's a little bit of rain? Seemed like we were riding through Katrina Sunday morning.

I can only imagine. It was raining pretty hard around here that day too. If I were there with my bike with all the electrical issues I'm having, I probably would have attracted lightning bolts and electrocuted everyone... best I stayed home!
« Last Edit: September 04, 2014, 09:13:03 AM by Groover »
1981 Moto Guzzi V1000G5
1987 Moto Guzzi LM1000SE, a
1987 Moto Guzzi LM1000SE, b
1980 Piaggio Vespa P200E
1980 Piaggio Vespa P125X
1980 Vespa Grande Moped
1980 Vespa SI Moped
http://scooteropolis.com/

Offline Groover

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Re: Battery Charging Issues: '81 V1000 G5
« Reply #43 on: September 04, 2014, 10:44:27 PM »


This worked perfectly. I was able to determine that my short is at the blue wire ( to the dash) circuit. I used a spare dash 1.2w bulb with alligator clips wired as shown in the testing diagram above. The bulb would go out with throttle and battery was charging; all is well.

When doing the test, the only different thing to take note of is that the the bulb is ON even with the ignition off, which is normal since the test circuit is outside the key switching.

Now I just need to clean up where the short is exactly, but I least now I know exactly where to look. (Blue wire up to the dash). I might just bypass that wire with a new wire to the dash until I clean up or replace the loom(s) - someday...

Again, this last issue I was having (with alll the new parts in) was a solid generator red light on on the dash, and no charge to the battery,

I hope this helps someone in the future.

Thanks again to those whom have helped me with this issue. Apparently, I had more than one problem in the charging circuit, but I think they've all been ironed out.

1981 Moto Guzzi V1000G5
1987 Moto Guzzi LM1000SE, a
1987 Moto Guzzi LM1000SE, b
1980 Piaggio Vespa P200E
1980 Piaggio Vespa P125X
1980 Vespa Grande Moped
1980 Vespa SI Moped
http://scooteropolis.com/

Offline Kiwi_Roy

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Re: Battery Charging Issues: '81 V1000 G5
« Reply #44 on: September 05, 2014, 05:31:04 AM »
Sorry I'm on the road this week. I thought you had it fixed.
Your sketch shows the charge light direct from battery, it should be thru ign switch.
With the key on you should see a little bit of Voltage on the red wire at regulator from the charge light. This passes thru the reg. to the DF+. Take the mystery wire off the charge light for now, the blue wire should be on it's own. Once the rotor gets exited the small  I rectifier diodes push the red wire DF to 12 Volts so the light has 12 on each side.


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Offline Kiwi_Roy

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Re: Battery Charging Issues: '81 V1000 G5
« Reply #45 on: September 05, 2014, 05:35:36 AM »
Oops. Tapatalk seemed to indicate the new parts weren't working, ignore my last.


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guzzibear

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Re: Battery Charging Issues: '81 V1000 G5
« Reply #46 on: March 26, 2015, 06:25:06 PM »
I had the same trouble chwl on ....here are a few pointers for others the check the voltage reg make a jumper wire connect to DF at the stator (Brown wire off, take off the red wire at the rectifier and connect the jumper to it fire the engine IF light stays on alternator fault if it goes out it is the voltage reg, the weak points in the system (other than wiring fault are the reg and the stator the Bosch system is very robust the rectifier hardly ever fails nor does the stator rotors can work harden and fail the resistance tests already highlighted will show up stator and rotor faults , the D+ and 61 are interchangeable the test diag was good too .

In the UK I found a place that can supply a new German made rectifier for £4o + postage info is on the site www.guzziriders.org free to join look under alternative parts thanks guys this thread is real helpful

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