Take your multi meter and test the coils. Then go to the junk yard and find some there and test those. Get the one that test good on the coils that are bad on yours. Take that thing apart, desolder the bad coil and throw it away. Now take the junkyard coil and desolder the good coil and solder it into your coil housing, put it all back together, tada! Good working isc. I have done this with no ill affects. I keep it as a spare. Or goto orielys and get one for 100.00 with a lifetime warranty.