Quote:
Originally Posted by Al Skierkiewicz
Both Jags and Victors use power FETs in the motor drive output. These devices contain a internal diode across the source drain terminals and when voltage is applied to the motor terminals, the diodes will conduct. This high current is manifested by the smoke released during your power on. Unfortunately all four controllers are damaged. I am guessing these were Black Jags.
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They were older gray jaguars. New black replacements are in the mail.
Our problems were probably two-fold.
Do the black wires in the power distribution board go to a "common ground"? The Jaguars were also hooked up to the board rather indiscriminately. The V+ and V- did not come from the same 40 AMP breaker.