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Old 12-11-2012, 10:57 AM   #5930 (permalink)
Southern Squidbillie
Join Date: Aug 2012
Location: Heart of Dixie
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What version is your controller?

Originally Posted by duncan View Post

Testing I get
Battery negative bus bar to heat sink ~ 7 Meg ohms
Battery positive bus bar to heat sink ~ 700 Meg ohm
Motor bus-bar to heat sink ~ 3 ohms
It looks like the motor bus bar is shorted to the heat sink.

If you wired up your controller using the 500Amp cougar mosfet schematic rev 2D that is found on the wiki page--it has a serious labelling error on connector J5 from the controller board to the power board. J1 and J12 are incorrectly indicating their polarity and connection to the battery pack B+ and B-. This may be the source of the short circuit.
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