John, wouldn't that be the same as running it to the + side of the resistor where the wire comes from the ignition switch?
It doesn't matter where you connect a load to the +ve battery or ignition circuit (when it is switched on) - it is all essentially the same as connecting it to the +ve of the coil (in a car with no ballast resistor). You need to connect it to the ignition circuit as this is the only circuit that is live when the ignition is on. If you connect it directly to the battery it will flatten the battery as it will become a continual load and drain the battery, if you connect it to the accessory terminal of the ignition switch it will remain on when you have accessories on.
If you had no problem with it connected to the coil - so long as you are not running a ballast resistor - connect it back up to where you had it before.
The possible problem with it connected to the coil is it may overload the wiring to the coil though I doubt this will be a problem.
Regards
Rick - West Australia
Do Y Blocks Downunder run upside down? Gravity Sucks!!