cB450 charging only with low on.

[joevirus563]

Low on is charging,
No light no charge
High, no charge.

I know these a bypass that I can do to short the white and yellow together to make it charger harder. But I need to fix this first...

The system is charging, just not with off and high setting.

 

[joevirus563]

Up?

 

[Flugtechnik]

It is likely related.

For the 450s, the charging systems have two circuits. One is always connected and always charges the battery. The second circuit is connected to the headlight switch and only charges when the high beam is on, giving you double the charging power.

That's not exactly how it works but is in a nutshell.

It sounds like your always on charging circuit isn't working. Check the connections at the round harness plug near your front sprocket. I know mine is old and the connectors inside don't always connect.

It kind of sound like your second charging circuit is connect with the low beam circuit instead of the high beam circuit. I don't know if that is even possible, but I can't think of any other reason for what you are seeing.

I would suggest studying the wiring diagram to understand how the charging circuits are setup, between the alternator and the rectifier. Check your connections and then do the mod that bypasses the headlight switch.

 

[joevirus563]

If I read right, the yellow is the always charging right?
The white is the "additional coil"
I should get charge at off and low setting but not at high...

 

[Flugtechnik]

The headlight switch part of that diagram is wrong. Looking at other diagrams, the second charging circuit should be connected any time the headlight is on (High or low, I was a slightly wrong before).

See any in here: http://oldmanhonda.com/MC/WiringDiagrams/MCwiring.php#class

 

[frogman]

Check the connection at the stator plug. The yellow runs from there to the handle bar with a bit that stubs off to the regulator/rectifier BEFORE it gets to the stator. IF the yellow connection at the stator is disconnected and the white IS connected you will have no charging until you turn on the head lights. THEN the white wire will connect to the yellow wire at the handlebar and flow BACK to the regulator/rectifier completing the charging circuit.

 

[joevirus563]

Check the connection at the stator plug. The yellow runs from there to the handle bar with a bit that stubs off to the regulator/rectifier BEFORE it gets to the stator. IF the yellow connection at the stator is disconnected and the white IS connected you will have no charging until you turn on the head lights. THEN the white wire will connect to the yellow wire at the handlebar and flow BACK to the regulator/rectifier completing the charging circuit.

I'll check that!

Thanks!