CDI Wiring By son10s (Read 13,634 times)

[son10s]

Also, what has me puzzled is: the CDI has a coupler with a black/white and a black. I know the black/white goes to the black/white on the coupler on the ignition coil end. BUT, since the coil is self-grounded, notwithstanding that it IS a good idea to ground it anyway, did the Chinese mean for there to be a black grounding wire coming from the coil to connect to the black on the CDI side, OR was the dark green wire supposed to go there? The plot thickens! I did not strip it down when I first got it so I really don't know everything the mechanic may have done. I DO know it left me stranded days after he worked on it and periodically ever since.

[son10s]

Hey Junior! I would like to see how the CDI hooks up. Also, when I opened the handlebar to do the troubleshooting J.R. suggested, I saw there are two cracks on the piece that covers the kill switch wires! A friend of mine and I opened it before to check contacts and he had a devil of a time putting it back together so I am a little nervous about unscrewing it but obviously I will have to do something about the cracks, lol! Oh, and it gets better: I see what appears to be a tie cut-off at the edge of the light switch connections, between the metal piece and the wire! Been trying to get pics but it is so dark in there..

[son10s]

Ok, J.R., I set the multimeter on ohms and did test the wires:
the kill switch dark green tested at 0.02.
the ignition green tested 0.00
I have not tested from the kill switch to 9pin because, as previously posted, I found the plastic is cracked and I'm a little nervous about unscrewing it unless I'm prepared to address this..

[son10s]

I followed your troubleshooting J.R.--got no spark even when I disconnected the kill switch wire. Thanks to your support I was able to summon up the courage to snip that red/black stator wire. I was nervous about doing it because the connectors were so close to the sleeves like I didn't have much wire to play with but I did it! Tried kick starting it again and after a few kicks, voila'! I couldn't believe my ears, turned it off and did it again and after a few kicks, once again, it started! Each time, it only ran a few seconds but that may be due to carb adjustments needed since I had removed it to clean it. I suspect the blue/white wire is not as good as it needs to be so I am going to snip it as well. When I cut the red/black wire, it didn't look all shiny coppery, really dull.. First, a trip to the Autozone is in order for some more solder and a better solder gun, then I am going to take Wang Chung out in the glorious N.C. sunshine and get him purring--I hope! Still won't start with the button, but Rome wasn't built in a day! I'll check back in later.. Thanks to everyone for their support! ;D

[JR]

Gaining some ground on her! This tells us stator, CDI and coil all good. Now we got to go through this wiring and get the bugs out of it.

Kathy looks like the Vento diagram is right on. Now remember we got to make sure we got the kill circuit correct to the igniton key switch and to the emergency kill switch.

You need to put the kill switch in the kill position and ohm it, should have full ohm resistance in this position and in the engine run position NO resistance.

It concerns me when you mentioned stuff on it cracked. So make sure it's good or buy another one, if it stays in the closed position the scooter will not run.

JR

[son10s]

ok, so I blew a fuse and went back over all my wiring. Then I checked to see if the turn signals worked--yes. the horn--yes. I wanted to see if the instrument panel was working to make sure I still have gas in the thing--yes. Now, the headlights are not connected to the bike anymore [wires not touching each other or anything else] but I turned the switch on anyway, mainly to see if I would get a good solid click, since I discovered that cracked piece when I opened the handlebar box. Sounded normal. Then I thought, may as well see if the High Beam Indicator light was working so I switched on the brights and pop! Blew the fuse again! It was then that I remembered that I had actually pressed that button earlier by accident but I had not heard the pop then, I just saw the fuse light on. Anyway, according to the Vento diagram, there are two wires directly involved with the high beams: the dark blue and the yellow/red. the dark blue is spliced between the two halves of the 9-pin connecting the instrument panel to the rest and the switch itself-- like a peace symbol, lol! The thing is, I can't get the darn switch box open to see if the connection is ok because somebody apparently loctited the two screws holding the box on the handlebar! I can't use a solder gun because it's plastic. I have tried PB. I have used an impact driver. I have yelled at it--it won't budge!

[JR]

Time for the drill and re-tapping the screws Kathy. According to the vento diagram the headlights feed off of the stator on the green/red wire and is fused.

It goes to a headlight on/off switch and the yellow/red feeds the hi/lo beam switch and dark/blue is hi beam aand light/blue is lo beam. Yellow also comes off of the on/off switch and feeds tail lights and instrument panel lights.

YOU SHOULD NOT BLOW A FUSE UNLESS THE SCOOTER IS RUNNING! It has no power until the engine is running. So if this is happening then you've got some wiring issues for sure.

Time to get it open and start tracing wires.

At this point I wouldn't worry about what this mechanic has done, I would trace each wire out and if it's wrong wire it up like on the vento diagram, we know it works.

We're here if ya need us.

JR

[son10s]

D'OH! just so you know, I did have the key turned on when the fuse blew because I was checking to see if it would start with the button..well, i guess it's back to the drawing board..

[son10s]

Mar 12, 2012 4:56:35 GMT -6 JR said:

According to the vento diagram the headlights feed off of the stator on the green/red wire and is fused.
JR

So "B A" on the diagram means fuse?
But I have only one fuse on the bike, the one coming off the battery. Are you saying I should add another one on the G/R?

[JR]

That's what it looks like to me Kathy? The Green/red comes from the stator and again your lights if it is like the vento diagram only work with the scooter running. They should not come on with just the key on and turing on the headlight switch, if it's like this dagram.

JR