Turn signal/lights ..:switch / wiring Question

Hello everybody I have a bit of a weird situation… I have a 1981 CT 70 :

I can't get anything electrical to work except the horn and the brake light… But they only work when the left turn signal is on??..And when the brake light is on...it blinks??… I'm thinking there is a faulty switch or it was wired incorrectly? Anybody have any idea let me know ...

Sounds like you have the battery positive going through the blinker. Then you have the headlight and other stuff that should be connected to the b+ on the blinkers output. The problem likely lies in your headlight bucket. A test light and a can of beer should be all you need to fix it, good luck.

Thx ..but not sure I understand what I need to change /check.. the headlight is burned out and want to make sure the issue is fixed to avoid possibly blowing out a new headlight ..... what would your checklist be? Thx

Google 1981 CT70 wiring diagram so you can see how things should be correctly wired up. You are going to need a test light or multimeter along with the diagram to work your way through the various connections.

First study the diagram to see how it’s connected. Once you understand it open up the headlight bucket and try to confirm things. Mark up the diagram with a highlighter as you confirm a wire that is good/correct. Ask questions if you need to along the way

#1) do you have a battery installed in the bike?

With your test light, hook the clamp to a good ground, or the battery negative. Make sure the light comes on touching to the positive terminal (or in reality, lead) before proceeding. With the headlight out, probe the metal of the connectors, with the key on. The red one with multiple sockets for plugs to go in should be hot with the key on. This should go out to the brake switch, to the handlebar switches, etc, and to the horn. I'm not sure if the horn is the same on this, but the switch cuts the ground to a constant positive horn. So the horn should be "hot" or have power on both sides when the key is on. When the button is depressed, it should be ground one side hot on the other, thus putting the light out, or at least dim, on the ground side, but still staying lit on the power side.

I hope this helps at least a little, but in reality, this is one for you to figure out. I, sure someone has made a YouTube video on it. And like scooter says before me, the wiring diagram is a big help.

I have a 1982 wiring diagram, if that will help?