<html><head></head><body>Sure. Power the motor with a 12 volt supply on field and armature. If it chugs it has a bad winding C <div class="gmail_quote">On September 10, 2016 6:59:26 PM EDT, Steve Gaarder <gaarder@ecovillage.ithaca.ny.us> wrote:<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;"> <pre class="k9mail">Is there a way to test for this? IIRC the armature has very low resistance to begin with. thanks, Steve On Sat, 10 Sep 2016, Harold Zimmerman - Clean Power Supply wrote: <blockquote class="gmail_quote" style="margin: 0pt 0pt 1ex 0.8ex; border-left: 1px solid #729fcf; padding-left: 1ex;"> Sounds like the symptoms of a shorted armature. On September 10, 2016 at 3:15pm -0400, you wrote: <blockquote class="gmail_quote" style="margin: 0pt 0pt 1ex 0.8ex; border-left: 1px solid #ad7fa8; padding-left: 1ex;"> I have an E-15 with an Alltrax controller and BB-600 batteries. All of a sudden the motor has become very weak and its output pulsates like the sound of a wheel with a flat spot. It does this even in neutral, and when it's in gear it draws a lot of current (the current varies in the same rhythm). Also the motor is quite hot. Any ideas? thanks, Steve Gaarder</blockquote> <hr /> Sent without a computer from my MailBug email machine. <a href="http://landel.com">landel.com</a>, 1-855-MAILBUG, getmailbuginfo@landel.com <hr /></blockquote> <hr /> Elec-trak mailing list Elec-trak@cosmos.phy.tufts.edu <a href="https://cosmos.phy.tufts.edu/mailman/listinfo/elec-trak">https://cosmos.phy.tufts.edu/mailman/listinfo/elec-trak</a> </pre></blockquote></div> -- Sent from my Android device with K-9 Mail. Please excuse my brevity.</body></html>