Do you know how to read schematics ? It might be the driver transistor which has shorted. You need to find out which transistor is corresponding to the outhole.
Schematics are here ;
http://mirror2.ipdb.org/files/1580/Stern_1979_Meteor_Schematics.pdfLooking at the Solenoid Driver schematic - "outhole" is Pin 8 of J5 - which is Q16.
Use a multimeter to check if it is shorted.
