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Yes... just the brushes by themselves to ground.
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Try your hardest to be the kind of person your dog thinks you are.
You can live to be 100, as long as you give up everything that would make you want to live to be 100!
Current bikes:
'06 Suzuki DR650
*'82 XJ1100 with the 1179 kit. "Mad Maxim"
'82 XJ1100 Completely stock fixer-upper
'82 XJ1100 Bagger fixer-upper
'82 XJ1100 Motor/frame and lots of boxes of parts
'82 XJ1100 Parts bike
'81 XS1100 Special
'81 YZ250
'80 XS850 Special
'80 XR100
*Crashed/Totalled, still own -
I know you have an extra field coil. Swap it out and see.
Process of elimination.Greg
Everybody is a genius. But if you judge a fish by its ability to climb a tree, it will live its whole life believing that it is stupid.”
― Albert Einstein
80 SG Ol' Okie;79 engine & carbs w/pods, 45 pilots, 140 mains, Custom Mac 4 into 2 exhaust, ACCT,XS850 final drive,110/90/19 front tire,TKat fork brace, XS750 140 MPH speedometer, Vetter IV fairing, aftermarket hard bags and trunk, LG high back seat, XJ rear shocks.
The list changes.
Comment
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If the field coil tested fine, why swap it and risk harming one or the other?
Still not understanding why you think the alternator is bad if it's charging fine? Why do you still think it's the culprit? It would be screwing with everything on the bike, not just the dash.Last edited by trbig; 09-06-2012, 06:45 PM.Try your hardest to be the kind of person your dog thinks you are.
You can live to be 100, as long as you give up everything that would make you want to live to be 100!
Current bikes:
'06 Suzuki DR650
*'82 XJ1100 with the 1179 kit. "Mad Maxim"
'82 XJ1100 Completely stock fixer-upper
'82 XJ1100 Bagger fixer-upper
'82 XJ1100 Motor/frame and lots of boxes of parts
'82 XJ1100 Parts bike
'81 XS1100 Special
'81 YZ250
'80 XS850 Special
'80 XR100
*Crashed/Totalled, still ownComment
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FWIW, I know nothing of XJ wiring either. I do know that wiring of this vintage has insulation prone to failure. This will show up in a hot vibrating place like the rotor. I'm a XS650 guy and those bikes short rotors all the time. That rotor is subjected to much more vibration, but I just thought I'd explain why I thought in worthy of investigation. I had one fail intermittently before I got a hard fault.Marty (in Mississippi)
XS1100SG
XS650SK
XS650SH
XS650G
XS6502F
XS650EComment
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This problem isn't something that comes and goes with cold/hot etc. Nothing is intermittent about it.Try your hardest to be the kind of person your dog thinks you are.
You can live to be 100, as long as you give up everything that would make you want to live to be 100!
Current bikes:
'06 Suzuki DR650
*'82 XJ1100 with the 1179 kit. "Mad Maxim"
'82 XJ1100 Completely stock fixer-upper
'82 XJ1100 Bagger fixer-upper
'82 XJ1100 Motor/frame and lots of boxes of parts
'82 XJ1100 Parts bike
'81 XS1100 Special
'81 YZ250
'80 XS850 Special
'80 XR100
*Crashed/Totalled, still ownComment
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I'm just working on the readings you got from the brushes. Hell, don't try it if you don't want to.Originally posted by trbig View Post
Just brainstorming.Greg
Everybody is a genius. But if you judge a fish by its ability to climb a tree, it will live its whole life believing that it is stupid.”
― Albert Einstein
80 SG Ol' Okie;79 engine & carbs w/pods, 45 pilots, 140 mains, Custom Mac 4 into 2 exhaust, ACCT,XS850 final drive,110/90/19 front tire,TKat fork brace, XS750 140 MPH speedometer, Vetter IV fairing, aftermarket hard bags and trunk, LG high back seat, XJ rear shocks.
The list changes.Comment
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I just went and got another complete sidecover with stator and brushes intact. Plugged it in and got the same readings on the brushes as the ones I had been testing. Tested the three white wires to the cover first and it was good. No continuity.Try your hardest to be the kind of person your dog thinks you are.
You can live to be 100, as long as you give up everything that would make you want to live to be 100!
Current bikes:
'06 Suzuki DR650
*'82 XJ1100 with the 1179 kit. "Mad Maxim"
'82 XJ1100 Completely stock fixer-upper
'82 XJ1100 Bagger fixer-upper
'82 XJ1100 Motor/frame and lots of boxes of parts
'82 XJ1100 Parts bike
'81 XS1100 Special
'81 YZ250
'80 XS850 Special
'80 XR100
*Crashed/Totalled, still ownComment
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That wierd reading your getting is a worry. I wish I was there to see exactly what's going on.
It sounds like a bad diode somewhere.Greg
Everybody is a genius. But if you judge a fish by its ability to climb a tree, it will live its whole life believing that it is stupid.”
― Albert Einstein
80 SG Ol' Okie;79 engine & carbs w/pods, 45 pilots, 140 mains, Custom Mac 4 into 2 exhaust, ACCT,XS850 final drive,110/90/19 front tire,TKat fork brace, XS750 140 MPH speedometer, Vetter IV fairing, aftermarket hard bags and trunk, LG high back seat, XJ rear shocks.
The list changes.Comment
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Tod,
If your bike charges all the time, the rotor is OK.Marty (in Mississippi)
XS1100SG
XS650SK
XS650SH
XS650G
XS6502F
XS650EComment
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Why would he be getting that wierd reading from one side of the field?Greg
Everybody is a genius. But if you judge a fish by its ability to climb a tree, it will live its whole life believing that it is stupid.”
― Albert Einstein
80 SG Ol' Okie;79 engine & carbs w/pods, 45 pilots, 140 mains, Custom Mac 4 into 2 exhaust, ACCT,XS850 final drive,110/90/19 front tire,TKat fork brace, XS750 140 MPH speedometer, Vetter IV fairing, aftermarket hard bags and trunk, LG high back seat, XJ rear shocks.
The list changes.Comment
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Paging Dr DAVINCI....1980 XS650G Special-Two
1993 Honda ST1100Comment
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He is probably running around New Yawk New Yawk looking for some chic named Mona or Lisa......Originally posted by madmax-im View Post
Greg
Everybody is a genius. But if you judge a fish by its ability to climb a tree, it will live its whole life believing that it is stupid.”
― Albert Einstein
80 SG Ol' Okie;79 engine & carbs w/pods, 45 pilots, 140 mains, Custom Mac 4 into 2 exhaust, ACCT,XS850 final drive,110/90/19 front tire,TKat fork brace, XS750 140 MPH speedometer, Vetter IV fairing, aftermarket hard bags and trunk, LG high back seat, XJ rear shocks.
The list changes.Comment
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When testing the rotor/brushes ('field winding' in the manual), you have to check at the first plug coming from the rotor. You should see about 4 ohms between the brown and green wires, anything over about 4.5 ohms means your brushes may be getting worn or the slip rings may be dirty. Neither wire should read to ground at this point; if either one reads to ground, you have a problem.Originally posted by trbig View Post
Checking at the plug by the regulator will give false readings because the brown wire also connects to all the other circuits (headlight, turns, ignition, etc; everything but taillight) and you'll read through some/all of those unless you pull the circuit fuses...
If the rotor/brushes check good and the system is charging correctly, I'd rule out the alternator.
At this point, I'd go back to the 'computer monitor'. This has 17 wires connected to it according the wiring diagram, and I'd start by disconnecting all of them except the brown (power in) and ground (black). One thing not shown on the diagram is the 'reset' button, I'd look at that to make sure it's not grounding or internally shorted. If after doing these things, the monitor still shows all systems bad, I'd say the monitor is NFG. If you get a head, tail, and battery fail only (as these would show 'bad'), then start plugging in individual wires until either those indications go out or you get a total 'bad' indication which should show which circuit is the problem. This will be a PITA as you'll have to pull the wires out of the plug and plug them in one by one, but is the only way to check the circuits and their wiring...Last edited by crazy steve; 09-06-2012, 11:51 PM.Fast, Cheap, Reliable... Pick any two
'78E original owner - resto project
'78E ???? owner - Modder project FJ forks, 4-piston calipers F/R, 160/80-16 rear tire
'82 XJ rebuild project
'80SG restified, red SOLD
'79F parts...
'81H more parts...
Other current bikes:
'93 XL1200 Anniversary Sportster 85RWHP
'86 XL883/1200 Chopper
'82 XL1000 w/1450cc Buell, Baker 6-speed, in-progress project
Cage: '13 Mustang GT/CS with a few 'custom' touches
Yep, can't leave nuthin' alone...Comment
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He has tried at least 1, maybe 2 other monitors, off of his parts bikes Steve with the same result.Greg
Everybody is a genius. But if you judge a fish by its ability to climb a tree, it will live its whole life believing that it is stupid.”
― Albert Einstein
80 SG Ol' Okie;79 engine & carbs w/pods, 45 pilots, 140 mains, Custom Mac 4 into 2 exhaust, ACCT,XS850 final drive,110/90/19 front tire,TKat fork brace, XS750 140 MPH speedometer, Vetter IV fairing, aftermarket hard bags and trunk, LG high back seat, XJ rear shocks.
The list changes.Comment
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Yup... 3 different monitors give the same results. Hopefully Ivan can figure it out this weekend.Try your hardest to be the kind of person your dog thinks you are.
You can live to be 100, as long as you give up everything that would make you want to live to be 100!
Current bikes:
'06 Suzuki DR650
*'82 XJ1100 with the 1179 kit. "Mad Maxim"
'82 XJ1100 Completely stock fixer-upper
'82 XJ1100 Bagger fixer-upper
'82 XJ1100 Motor/frame and lots of boxes of parts
'82 XJ1100 Parts bike
'81 XS1100 Special
'81 YZ250
'80 XS850 Special
'80 XR100
*Crashed/Totalled, still ownComment
Comment