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YELLOW WIRE WITH A BLUE STRIPE

B

bhbzx7

Joined Mar 2007
55 Posts | 0+
Morganton NC
Any ideas on what the yellow wire with a small blue stripe goes to....I found one taped off and rolled into a ball in the wiring harness. My battery keeps going dead when riding ( I am getting a steady currrent ( If i have 12.2 volts and kick start the bike it will hold at 12.2 at idle but if rev up it stays the same. If I turn on the headlight it drops to 8.4 etc.) I am looking for the culprit. By the way the bike is 2001 FX470e.If i let it sit for a week I have maybe 9.1 to 9.3 volts.

Thanks
Heath
 
I do not have any knowledge of the older models.

Check the wiring schematic, but it sounds like a CDI to ground lead used for kill switches and on some models for an ignition key disconnect. My 06 schematic shows two of these leads - maybe you have found a spare one?

Cheers

Mark
 
I downloaded the schematic and will check it out tonight...Thanks for the Help !
Heath
 
From the schematics, the only one like that connects to the start button, and from what I see it is specific to the Hi/Lo mapping thing. The schematics is not always right, I have seen wires with the wrong color. So how long is that wire and where does it go?

Otherwise, you have a drain somewhere, or the stator is not giving mucho voltage, which would not surprising from a SEM unit. You can have it rewound by our friend Sparks. It may be the sign of a dying stator.

Since you have an FX, I suppose you do not have a headlight, which would drain a few extra volts (I am about to add a switch to prevent that drain during day time, except for when I am in hi beam, so I can give a quick "see me?" flicker).
 
I did put a headlight and tail light so that I could tag the Berg. The wire is apx 18" long and ties in on the backbone just above the carb on the left side. It has a small rectangular plastic clip on the end of the wire. Is the SEM something that I should upgrade?
I did put a 3 position switch to the headlight ( on off and hi) that didnt help me any.
 
With all the lighting equipment hooked up, it is not uncommon to see a drain and the voltage go down. You can have the SEM rewound, everybody swears by it. You can also add a switch, as I am about to do, to prevent the headlight from operating when you are dirt riding, then once on the road, turn it back on (daytime running lights are a must on a the road). One of these days I will send my SEM To Spain.
 
Also did you connect on the AC, or the DC? Does the light go down in intensity when the bike is idling?
 
Hi bhbzx7,

You generally find that most electrical problem to do with lighting and charging are down to a bad connection some where usually a bad earth.
The Blue wire is ground both Yellows are common to each other one Yellow feeds the regulator rectifier for charing the battery and the other feeds the regulator for the lights.
If your battery is dropping to such a low voltage then I suggest it could be knackered, it should charge at around 14v same as for the lighting should be around 14vac off idle.
But if your model wasn´t fitted with lights then the wire you have found will be to do with the AC regulator side.
Let us all know how you get on.

Regards

Sparks.
 
Ok ... I am now going to the garage with wrench in hand. I will put anather battery in and charge overnight and check all of my grounds and let you guys know. Thanks for the input. Heath
 
Alright....I charged the battery overnght and it wouldnt charge over 12.21. I tried to spin it over with the button and wouldnt even "click". Anyway, Idid the old screwdriver across the selonoid trick and it still didnt click, so I went to the local berg dealer and picked a selonoid switch ad now it will spin the engine over ( still no start ). So then I kicked it 1 time and it purrs (like always) and I checked my volts on the DC side (on the batery posts) (THANKS LeFrog).I have 12.03 ,after charging,on the battery at idle or revving and also if I turn the lights on the voltage drops and does not recover. I have went every wire I can find and cleaned the terminals. Shoulld I look at the stator next ???

If it is time to look at the stator is there a simply test to check it ??
 
When you ride at night, does the light dim down when you slow down and get brighter when you accelerate?
 
here's a post from another topic.....
could be it....


i believe that the wire that activates the starter soleniod must also go to the ignition box.
i bet without this, you may have troubles.


tuts
 
berg wiring.....

LeFrog said:
When you ride at night, does the light dim down when you slow down and get brighter when you accelerate?
Click to expand...

Nope...keeps getting less and less as the battery gets weaker and weaker ( this was before the new selonoid , I havent tried it today other than sitting on the stand. If I rev it up the light doesnt change)

Tuts I cant see the link in your post.
 
RE: berg wiring.....

That means your headlight was hooked directly to the battery, which is not so good.

With a better stator, it would not be such a problem, but with the SEM stator, you're simply using more current than is produced.

You need to consider rewiring or adding a switch to the headlight.
 
RE: berg wiring.....

Where should I move the power wire for the light to ??? I do have a switch for the headlight (off,lo,hi). If I leave the headlight off the battery still runs down to about 8 or 9 volts after a few hours of riding. The only thing is on all of the time is the taillight. The bike has never cut off or cut out like its not getting spark. I went ahead and put a full charge on the battery and spun the motor over with the decomp lever pulled and it spun maybe 5 or 6 times before the battery didnt have enough to turn it over anymore. I just put a new battery in when I first sarted this project (size 7). Maybe a bad battery ??? The battery will drop to about 3 v when hit the e button bt it will recover to about 11.5 to 12.0 after starting @ 12.25 to 12.30. btw all of the decomp devices are to spec.
heath
 
Heath, have you checked for a broken wire in the harness up by the headstock? I thought it was in the doc but the 01's were notorious for this. My FX had it also.

Cut back the protective wire covering 4 to 5 inches on the harness up by the headstock. You will find a connector in there with the wire broken off. If it's broke the battery will not charge.
I hook up my headlight and grip heaters to the second yellow wire that you found and never had a problem but you will have to wire in a voltage regulator.
 
Re: RE: berg wiring.....

LeFrog said:
Did you test your stator with an ohm meter?
Click to expand...


No.....which wires do check for that? ( or do I need to take the stator out and check across it)
 
buckwheat5679 said:
Heath, have you checked for a broken wire in the harness up by the headstock? I thought it was in the doc but the 01's were notorious for this. My FX had it also.

Cut back the protective wire covering 4 to 5 inches on the harness up by the headstock. You will find a connector in there with the wire broken off. If it's broke the battery will not charge.
I hook up my headlight and grip heaters to the second yellow wire that you found and never had a problem but you will have to wire in a voltage regulator.
Click to expand...


Thanks !!! I will check that too...
 

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