As per the last two posts
I have thought of adding another constant source
Also as mentioned a low source . Yes thats whats been puzzling me
With repeated probes hours apart sometime I will see 12V also I will see it climb slowly in voltage
An drop when the key is turned to accessory or ignition
But all said it does require 2 inputs or it will not work
I find it hard after all the hours i have been searching & reading It would be a shame to not be able to restore it to original condition . Especially since I'm already naturally grey