Electrical Issues - 2008 Jonway Shenke 244cc By someguyin408 (Read 1,945 times)

[someguyin408]

A couple weeks ago I had a charging issue. Turned out to be a faulty R/R.
I got a new one and replaced. Everything seemed to be good, then after driving about 500 miles my scoot wouldn't start. I had a dead battery. I found a power plug and charged my scoot for a while. When I turned the key on I noticed that the head lights came on (engine not running). This seems to convey to me that the R/R opened up and is allowing power to go backwards from the battery to to the lighting. Also, with the charger connected over-night the red charging light should have turned green.
This is telling me that the battery is draining to ground somewhere and the battery is never fully charging. Probably a resistive drain to the ground through the bad R/R.

When I first installed the R/R I as getting a reading of 17 volts at high RPMs. I refused to ride it. Then when I had time to work on it it suddenly dropped to spec voltage.

Anyone have any input on this?

[alleyoop]

Welcome someguyin408, glad you found the site. To me it sounds like a bad R/R/ it should not allow that high of volts but I am not a Electrical genius I am sure JR or someone that knows the electrics better than I do will chime in.
Again Welcome to the forum, you cannot find anyone better on the 250s for electrical and cooling than JR.

I know I am putting him on the spot but hey one good turn deserves another he sends all the carb problems over to me ;D
Alleyoop

[tvnacman]

check the ballast resistor . pull the battery and have it professionally tested . i dont like to see more than 14.5vdc . some claim to run at 16vdc . the battery can cause very strange problems , spikes and low voltage .

John

[JR]

I only have a moment but will check back in after I return from my grandson's pee wee football awards ceremony but if you turn the key on and the lights come on then you've got a bad diode, it's shorted across which is allowing the battery voltage to go to the headlights.

So we know that's and issue and we can do some tests to check the R/R when I get back so in the mean time you need to charge the battery and make sure it reads 12.5 volts or better after a good charge.

I'll check back in about 9:00 p.m.

JR

[cruiser]

Welcome to the forum David. If the blocking diode was shorted, the headlights would be on all the time even with the key off. It sounds like the R/R may have an internal short. I would try unplugging the R/R to see if the headlights still come on with the key. If not, then the R/R is shorting from the black sense wire to the red output. This could also explain the problems trying to charge the battery. Try charging the battery while the R/R is unplugged. Let us know what happens.

[JR]

Sorry David in my hurry I didn't read your post correctly had only 3 minutes until I had to leave. I thought you said after you charged your dead battery that the lights were on all the time not after you turned on the key.

Cruiser is right if the R/R has an internal short from red to black the lights will turn on when the key is turned on. You can unplug the R/R as he said charge the battery and see if they come on with turning on the key.

Now if this has no effect on it and the lights still come on when you turn on the key then the red and black have fused or rubbed together somewhere in the R/R area. Like Cruiser said let us know we are here to help. Also we have a correct wiring diagram on this scooter in our tech section.

JR

[someguyin408]

Awesome. I have two days off before thanksgiving so I will check. I am proficient in electronics. I started when I was 10 years old building and repairing electronics. I know how to work on cars and trucks. I'm just hesitant to dive into my scooter without doing some homework first. I can tear down my old 50cc Sundiro and put it back together no problem. But this is a bit more involved.

I know the battery is good. The batt fully charges on a motorcycle trickle/float charger and voltage measures 12.8.

I'm going to follow your next steps to see what's going on. Thank you!