Continuous duty solenoid

[Charles22]

18 hours ago, Yetti said:

Its all positive on the Master switch Master Solenoid.   So if it is "grounding" out you would have big sparks.    So I am going to guess that your master solenoid is staying on and not turning off when the switch is turned off.   

The master solenoid can weld itself on.   There could be a short with another positive wire that energizes the master solenoid. This would most likely could happen at the switch.   It is connected to a buss bar with the other switches.    It is possible for the panel to sag and the switches hit the cromolly tube that is right below them.   Use your cell phone camera to see what is going on behind the panel and the row of switches.    Could also be an errant wire back there.

A positive wire goes from the master over to the fuse panel that connects to the comm relay. so no.

 

Thank you, will see what I can find but it’s nothing obvious as I have had multiple A&P’s look at it and we replace the positive wire from master switch to solenoid.