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Please confirm this for me

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Guest
I've been working on a GS1000 (not mine, side job), going through the electrical system. The owner installed a Dyna 2000 and Dyna coils, and the ignition fuse kept blowing on him, so he brought the bike to me. I found the reason the fuse was blowing was because he had one of the 12 volt leads going to one of the coils that was shorted to the frame. I fixed that to where when you turn the key on, the fuse no longer blows. But now with the key on, I'm getting 12 volts at both sides of both coils. This is with nothing else hooked up to them, just the orange and white wire on one side. Not good, right? I checked the primary and secondary resistance and they are both off a bit, but not much. 2.7 ohms and 7000 ohms. I think the secondary should be more. But anyway, I shouldn't be getting voltage at both sides, right? Do you think he fried the coils by shorting one of them out?
 
If the coils are not attached to anything, they will show whatever voltage is applied, at both ends. When there is a path to ground, then one end of the coil will show the 12v, the other end will show 0.

Think of a points system, during the time the points are closed, current is flowing, the coils will have one end at 12v, the other end is 0 as it is grounded. There is a voltage drop of 12v across the coil. During the time the points are open, both ends of the coil will be at 12v.

Does not sound like you have a problem.
Shorting the coil to ground would not have hurt it, the current would bypass the coil straight to ground.
If the current went straight through the coil to ground it shouldn't hurt it, they are made for that.
 
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Thanks. Well I guess there is another problem. I had originally had everything else hooked up; the controller and the pick-up. With everything hooked up accordingly, I still get 12 volts constantly on both sides. The one side doesn't drop out as you turn over the motor. Maybe a problem with the controller or the pick-up. I'll call Dyna and see if they have a way of diagnosing what' wrong.
 
voltage is a yes at both connections on the primary circuit while coils are energized. don't try to check for spark with a test light on the primary negative side of the coil.

swipe a screwdriver near the pick-up coils on the crank- actually observe the spark plugs flash. just pull a wire off and use a test plug.

kinda a short cut to check for spark. one has got to check if signal is being made first. or if good signal is going into the box and not getting passed on.

by signal I mean the inducted spark ignition signal.

it goes= crank to brain. and then brain to coils. finally coils to spark plugs.
 
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