Piper external power not working

[cowboyfl]

We tried to plug into the external power outlet ..the jumper didn't seem to boost the battery...I attached a charger to the external plug but said no connection.
Could that stupid SOLENOID be eithet stuck or bad..I have check and 12v is going to the SOLENOID on one side...part #484-373 per the book but it looks like
any automotive 12v SOLENOID would work..vs $75 for another one...any ideas???? could the diode be bad??? I though the purpose was to make a connect to the battery when 12 volts was applied.
Thanks

 

[Ray93J]

 

[Orest @ CYFD]

 

[FLYZONE]

 

[Ray93J]

 

[reb]

 

[cowboyfl]

 

[JohnPhillips]

 

[Ray93J]

 

[Ray93J]