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Charge light problem - SP1000

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ranton_rambler View Drop Down
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    Posted: 29 Sep 2018 at 17:19
Any thoughts on this little electrical issue with my SP1000.
Sometimes the charge light comes on whilst riding - not a little glow but properly bright for periods varying from a few seconds to perhaps 20-30 seconds. Only happens when I have the headlight on, have never seen it otherwise. I would say it is more frequent soon after setting off on a trip. I realised the other day when I was behind a car that the headlight goes off when the charge light comes on. And today I was playing with it on the main stand and I noticed the neutral light also went off when the charge lamp comes on. There doesn't seem to any issue with keeping the battery charged.
I will be studying the wiring diagram tonight, but any thoughts welcome.

Ian
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theone&onlymin View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote theone&onlymin Quote  Post ReplyReply Direct Link To This Post Posted: 29 Sep 2018 at 17:45
Try rotating your fuses. Or cleaning your contacts on both fuse and box. That is what happens to mine occasionally so it does. 
You could go the modern route and use a spade type. 
Cheers
Min



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Post Options Post Options   Thanks (0) Thanks(0)   Quote jpc Quote  Post ReplyReply Direct Link To This Post Posted: 29 Sep 2018 at 18:10
I'm having the same problem on my T3 lately, but I KNOW it's the Molex multipin connector on the back of the headlight that  needs replacing. The problem comes and goes by jiggling the connector, have you tried ? I've had a new connector and pins for ages on the workbench, "Must do !" stuff.

As Min said, fuses too.

Spade connectors on the alternator are known to rot & turn green after some years.

Alternator brushes are not eternal, sometimes only a stub remains, the spring becomes ineffective and the brushes "float"over their tracks.
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Mike H View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Mike H Quote  Post ReplyReply Direct Link To This Post Posted: 29 Sep 2018 at 18:21
Also posted on club forum, but worth repeating:

Originally posted by Mike H Mike H wrote:

SP 1000 uses a circuit board under the dash to mount all the idiot light bulbs. LO-OTS of electrical connections; two PCB edge connector plugs, and each wedge bulb sits in a black plastic holder which in turn has a bayonet fitting into the PCB. Lots of potential for corroded / verdigris connections.

But also check the alternator brushes, what you describe is also like the symptoms for bad brush contact, too short (worn) or jammed in its holder. (Guess how I know.)

HTH


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Mike H View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Mike H Quote  Post ReplyReply Direct Link To This Post Posted: 29 Sep 2018 at 18:26
PS: see also my write-up about rebuilding a dash I bought from Reboot Guzzi spares in 2013, was quite a mess all due to corrosion. Needed all new bulbs and bulb caps and the solder tinning on the PCB had gone black, had to be scraped off and redone.



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Post Options Post Options   Thanks (0) Thanks(0)   Quote ranton_rambler Quote  Post ReplyReply Direct Link To This Post Posted: 29 Sep 2018 at 21:01
Originally posted by theone&onlymin theone&onlymin wrote:

Try rotating your fuses. Or cleaning your contacts on both fuse and box. That is what happens to mine occasionally so it does. 
You could go the modern route and use a spade type. 
Cheers
Min





Will certainly try that. Fuse issues can certainly give confusing symptoms. Most recent one back in July was no dash lights except the charge light, which only went off when I put the bike in gear. Came back on with the front brake but not the rear. Serves me right for washing it.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote ranton_rambler Quote  Post ReplyReply Direct Link To This Post Posted: 29 Sep 2018 at 21:06
Originally posted by jpc jpc wrote:

I'm having the same problem on my T3 lately, but I KNOW it's the Molex multipin connector on the back of the headlight that  needs replacing. The problem comes and goes by jiggling the connector, have you tried ? I've had a new connector and pins for ages on the workbench, "Must do !" stuff.

As Min said, fuses too.

Spade connectors on the alternator are known to rot & turn green after some years.

Alternator brushes are not eternal, sometimes only a stub remains, the spring becomes ineffective and the brushes "float"over their tracks.



I don't think this bike has a plug at the back of the headlight - a branch of the harness goes into the shell through a grommet. There are 2 multi-way connectors under the tank which might be worth a look. I have looked at the alternator brushes already, but will do it again.
It would be better if it would go wrong a bit more often so I could get the multimeter on it at home. I daren't go out in the dark now I know the light comes and goes so it's no good for going to work even.
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Brian UK View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Brian UK Quote  Post ReplyReply Direct Link To This Post Posted: 29 Sep 2018 at 22:23
Also check all the connectors to the rectifier and regulator.
Brian.

Better 5 minutes late in this world than years early in the next.
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Barry View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Barry Quote  Post ReplyReply Direct Link To This Post Posted: 30 Sep 2018 at 08:18
This may be the very thread you want:  http://guzziriders.org/mystery-short-ignition-switch_topic9195.html?KW=1000SP


Note well the reply from from Gianni. That was the fix I was looking for!


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Mike H View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Mike H Quote  Post ReplyReply Direct Link To This Post Posted: 30 Sep 2018 at 18:18
A-ha! Thumbs Up


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ranton_rambler View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote ranton_rambler Quote  Post ReplyReply Direct Link To This Post Posted: 05 Oct 2018 at 20:33
Cause seems to be intermittent contact on Fuse 3. Wiggling it replicated the fault so cleaned it up. Need to try it on a decent ride to confirm.
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Barry View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Barry Quote  Post ReplyReply Direct Link To This Post Posted: 06 Oct 2018 at 09:20
Looks like Gianni deserves a 'thanks' from you, too, then!
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Post Options Post Options   Thanks (0) Thanks(0)   Quote ranton_rambler Quote  Post ReplyReply Direct Link To This Post Posted: 06 Oct 2018 at 13:38
Originally posted by Barry Barry wrote:

Looks like Gianni deserves a 'thanks' from you, too, then!
Yes indeed!
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Post Options Post Options   Thanks (0) Thanks(0)   Quote ranton_rambler Quote  Post ReplyReply Direct Link To This Post Posted: 11 Nov 2018 at 21:10
Just to update, in case it helps someone else out. Having cleaned up the fuse box connections and all the fuses, this problem was still there. With it running on the centre stand today I waited till the fault appeared and checked a few other functions and it seemed that everything on fuses 1-3 was affected. This pointed to the key switch so I dropped it out to check the connections, and actually found the switch body falling apart. Took it apart carefully, cleaned inside and bent the little tabs back over. Seems OK now.....
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Brian UK View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Brian UK Quote  Post ReplyReply Direct Link To This Post Posted: 11 Nov 2018 at 21:32
Yes, that might have caused a few problems.
Brian.

Better 5 minutes late in this world than years early in the next.
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