hey.thanks for looking and any input.93 940 car wiil randomly turn radio off dim dash lights slow wiper motor. cruising or parked .car warm.often will immediatley correct itself and everything back to normal.headlights on or off does not effect the phenomenon.the car jump starts immediatley and all lights may be very dim on dash turn headlights on tach goes to 0.put foot on brake pedal tach goes to 0.for no apparent reason in no specific time frame the entire system will come into its normal mode......until the next time.i have checked all positive connections and all grounds,but it feels like a short to me.new alternator for what its worth.car has 135k.any suggestions would be of help .thanks