My question is.......
How many amps do you intend to draw on this circuit that you need to draw off
the battery cables?
If you are drawing that many amps...... how long do you think your battery is
going to stay up?
You might want to consider what kind of amp draw you will have on whatever
you are trying to powerup.
As far as a circuit that is powered up only when the bike is running, the
first one to come to mind is the stator. Any one of the three white leads
will have 15 to 18 ACV when the bike is idling. However, since I am not an
EE, I have no idea if a relay will function on AC voltage.
As far as a circuit that is powered up after the key is on, the brown wire is
system power and is "hot" when the key is on. The red wire is hot all the
time and runs from the battery to the key switch.
Again, depending on what you are intending to power off your accessory
circuit, if you really insist on it only being powered when the bike is
running, maybe you could install a toggle switch to control power to the
relay.
I think we have more EE's on the list than anything else. I am confident
they can resolve your problem. I think if you supply more information, it
would be even easier for them to engineer a solution for you.
RSRBOB
