1991 940 se keeps blowing fuse to ignition coil

Guest · Post by **Guest** » 22 Sep 2005, 08:11

My 1991 940 keeps blowing the fuse that feeds the current to my ignition coil. Can anyone explain this or offer a way to fix this problem? It has happened twice to me in a 1 month. Once while i was driving and the other time while the car was parked. Both times the car would not start afterwards. Any help would be greatly appreciated.

LaRy · Post by **LaRy** » 23 Sep 2005, 14:20

One possible reason is that the insulation in the ignition coil is bad. You could disconnect the coil and messaue the resistance. If you have a Bosch system the primary value in the coil should be 0.6 - 0.8 ohm and secondary 6900 - 8500 ohm. If you have a Bendix ignition system the primary value should be 0.35 - 0.65 ohm and secondary 4000 - 6000 ohm. Probably the lower value will differ 10 - 20 % from this values, because an ordinary multimeter has very bad accuracy in values below 1 ohm. Anyway, I would probably change the ignition coil and see if it helps.