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Message: <blockquote data-quote="C5Performance" data-source="post: 135485" data-attributes="member: 2938">The ignition module can operate on a 9v flashlight battery, but not the coil. When a 3 ohm coil is on, it draws 4 amps. A motorcycle sized battery with at least 9 volts will operate our coils. Yes the saturation times are extremely low compared to Dyna or others, but you still need a certain amount of voltage/amperage while the coil is charging up. The simplest way to resolve a "low volt" question is to run power directly from the battery to the coils. On the GL1000 that will be the center coil lead which is red. If your problem goes away, you know its a connection issue somewhere on the vehicle. If not (assuming your battery tests ok) then you have other issues. Your battery should have at least 9 volts to operate the coils, and if its that low I doubt your starter would work anyway.  Does this make sense? Run a jumper wire from your battery directly to the module and coils, then report back to us. -Paul</blockquote>