I just bought a 1964 1800 with a 12v generator and was wondering which wires you use to polarize it and how to do that.  When I tried to check the RPM with my tach it wouldn&#039;t register and when i switched over to check voltage it went negative so I am thinking that the gen is polarized wrong or something. Then again I used a multimeter to see if it was putting juice out and across the field and armature poles there was nothing. 

  If I can&#039;t figure it out I am just gonna swap it to an alternator but would really need to wait a little bit before doing that. 

 Thanks!