could a bad RR blow the coils?

[snowbeard]

so I finally got the 850 running the other night, but now when I go to try it I get no spark? admittedly the battery is weak, but even jumped it has nothing.

I have poor current at the coils, like about 11.9, but it's been plenty to run it so far, so I count that out.

on the four wires to the coils I get 11.9 all except for one of them, so should I only get current on two or four, three just doesn't seem right.

if my RR was bad, could it have been the reason the coils had blown in the first place? I had to replace coil for 1/4 to get anything in the first place.

d@mn, just when I thouht I had a running bike

[LW_Icarus]

you should have power to the two positive terminals to the coils. the grounds are interupted to make the coil produce a spark.

depending on the type of ignition you have its likely the igniter box or if its points somehow its feeding current through em. you should not have power to the negative side of the coil. are you checking the wires while they are diconnected from the coils? I imagine it could also be feeding current through the coil.

and an overcharging /spiking electrical system can indeed take out ignition parts.

[duaneage]

Try this:

Connect a coil to the battery with a switch to turn it on and off.

Insert a plug in the boot and ground the threads to the batery as well.

Turnnon the switch and then turn it off. See if you get a spark.
That is what point and ignitor modules do. When you tested the spark did you get a good ground for the plug?

[snowbeard]

I believe i had a good ground, but only laying them on the engine it's hard to tell, I've become leary of holding onto them anymore...

seems to me that either they should have power to all four or just two, anybody know which is correct? this is checking just the wires into the coils, there's a common orange, then a black/white stripe and a white wire. it doesn't change when all hooked up either...

thanks so far!

[xifer]

seems to me that either they should have power to all four or just two, !

As said before, just the inputs should have power - either there's
a short in the coil so 2 plugs won't have spark or that coild's switch
happened to be in the 'spark' position when you measured. Anyway,
I just rewired my coild because of low voltage - I found in the headlight
shell there was plenty power but it was dropping between there
and the coils so I used new wire from the headlight shell and got
better spark.

[snowbeard]

I'm starting to suspect a full rewire myself, the old girl went down "due to electrical issues" in the first place, might save myself a lot of headaches... :roll:

thanks!