Blinkers, Horn, Fuel gauge not working By jennybyrd1 (Read 17,839 times)

[jennybyrd1]

Hi!
Over the weekend, I removed the battery from my 50cc chinese scooter to let my son use it in his, because his was dead. I charged the battery, went to install it, got distracted, couldn't find the screws, etc. When I went back & tried to start, and the bike wouldn't turn over. After getting my original battery back in the bike, she starts with no problem.
However, now my tail lights, blinkers, and fuel gauge do not work. I can't find any loose connection. I also don't hear any flasher sound from the flasher relay. As I was distracted the first time, I think maybe I swapped the battery cables around, and blew something? I've checked the fuse, and it's fine. Would a blown rectifier cause the lights & horn not to work? I have absolutely no electrical knowledge!
Thanks for any ideas!

[Alleyoop]

Those systems that you mentioned are fed straight off the Battery. So check the fuse on the red thin wire attached to the POSITIVE TERMINAL of the battery. Or it may be that wire is not connected and you left it hanging. But if it is attached the fuse MAY look good but it is probably blown if you swapped the battery cables around. So first thing is get a new fuse in there. They are usually TUBE type fuses and they can blow the thin wire where you cannot see it through the tube.

So pull it out and go and get the same type and amp it is probably a 10A or 15A fuse.
Alleyoop

[jennybyrd1]

Thanks, Alleyoop.
The fuse was the first thing I checked. It had a bit of rust on the contact, but was otherwise fine. I replaced it anyway to no avail.

[Bashan]

Putting your battery in backwards would have blown the fuse Alley mentioned. Also, as Alley pointed out it's some DC circuits that aren't working. Look at the following diagram, it's a generic wiring diagram of a typical GY6 scooter:

Look at arrow #1, it references the red and black wires off of the ignition switch. When you turn on your key it energizes the black wire which runs to DC circuits that need to come on before you hit the starter. Follow along with me and I'll explain what may have happened.

The components that you said went south all run off of the black wire. Refer to the numbers on the diagram and you can follow the non-functional component's supply back to the black wire:

• #2, the fuel gauge
  
• #5, the turn signal flasher
  
• #6, the horn
  
• #4, your tail light
  

So it crossed my mind maybe the ignition switch went bad and no longer connects the red wire to the black, hence no juice. However, you still have some things working that shouldn't be if the switch went bad, namely:

• #3, your dash lights
  
• #9, #10. #11, your brake light.
  
• #7, your starter button
  

What really baffles me is your brake light doesn't work but your starter does. The brake light circuit is supplied by the black wire which energizes the starter button when the brake handle is pulled in. If your brake light isn't working how is the starter button working? The starter button grounds the R/Y wire and energizes the solenoid IF the brake is pulled in to connect the black wire to the G/Y.

So I'd like you to indulge me and see if the following are for sure working or not.

• The brake lights
  
• The dash lights
  
• The starter with the button
  

If those are out too we'll need to test the ignition switch. If they do work we'll have to chase some wires and grounds.

[jennybyrd1]

Thank you Bashan!
I have the wiring diagram for my specific scoot, but I admit I really didn't understand it. Your explanation helps.I'm attaching my wiring diagram, hopefully it is legible.

My starter switch was rewired a few years back because the switch was faulty. I checked that last night and it looks like it runs directly off of the battery and attached to no other components , which would explain why it works.

My tail light & brake light are one & the same - so no juice there, and you're correct the dash light also does not work. 

I guess my next course of action is to get a multimeter and start checking wires? I may also pick up new 
fuses and try that - the one that I swapped out had been sitting around for ages so I guess there's an off chance that something is wrong with it?

Attachments:

[jennybyrd1]

PROBLEM SOLVED!

Found a bad connection in the fuse wire.

Thanks for your input!

[Alleyoop]

Good job, I knew it had something to do with the fuse. Get yourself a 12v Light Tester to check wires that are supposed to have voltage. Just clip the wire to a good ground and then probe the wire you think should have voltage. If it has voltage the tester will light up.
It would have been easy to test the fuse, just test the wire going to the fuse and then on the other side of the fuse and see if juice is passing through the fuse.
Alleyoop

They are cheap only a couple of bucks but indispensable and will save you a lot of time:

[Bashan]

I'm glad your up and running. You have an interesting configuration that complicates things a bit. Look at arrow #1, you'll see the R connected to black in the ignition switch as we discussed. #2 you see them exiting the switch. Now at #3 rather than the black wire supplying the DC components it runs to the security device.

The wires then exit the security device to run through the bike. These devices are junk and fail all the time. I'd say remove it but that can cause major problems. Now, think about it, how is this going to stop a thief from stealing a scooter? I can pick up one end of a 50cc scooter no problem. Two guys can pick it up and throw it into a pick up which is exactly what they do around here. The security device does not even slow these guys up.

[scoot911]

Dec 27, 2013 10:13:29 GMT -6 jennybyrd1 said:

Thank you Bashan!
I have the wiring diagram for my specific scoot, but I admit I really didn't understand it. Your explanation helps.I'm attaching my wiring diagram, hopefully it is legible.

My starter switch was rewired a few years back because the switch was faulty. I checked that last night and it looks like it runs directly off of the battery and attached to no other components , which would explain why it works.

My tail light & brake light are one & the same - so no juice there, and you're correct the dash light also does not work. 

I guess my next course of action is to get a multimeter and start checking wires? I may also pick up new 
fuses and try that - the one that I swapped out had been sitting around for ages so I guess there's an off chance that something is wrong with it?

Could you upload a better more legible picture of your wiring diagram, Thanks

[jct842]

Best to start your own thread, this one is 3 years old and the man you replied to has passed away!

In your own thread state what kind of a problem you are having and what scooter you have.

Your scooter has a number stamped on the lower left side of the engine case next to the kickstand. This is an identification that means something. importer names of scooters usually mean nothing. pictures also can help.

[cyborg]

Amen