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Why would a Falcon 900ex not take center fuel

 

19 QS transistor #3 passed the 2 diode check.

 

By the base was stuck at 9.7 vdc instead of 25 vdc  when not fueling.  Would not turn on when fueling requested.

 

Replacement transistor fixed it.   WHY?

 

Could 15QS wire be shorting intermitantly?  Wire repair at 14 qs plug is ugly.  Could it be popping the #3 transistor.