Freightliner Annunciation Module Flashing when power if off

[bruce Dixon]

2002 Itasca Horizon 39' Cat 330 HP Freightliner Annunciation Module Flashing when power/ignition switch if off and keys removed.
let me try to say this right.
when we pull in to a camp site get all set. key is removed from the ignition. we will be sitting back relaxing after several hours or getting up in the middle of night we will notice the Annunciation Module Flashing all indicators are flashing randomly (like a xmas tree with twinkle lights). If i turn the ignition key on to the accessory position lights will quit flashing, then stay steady, when I turn off the key the Annunciation Module goes out. and everything is normal. I have replaced this Annunciation Module once for another reason. but it did same thing then also.
It is very intermittent about when it happens. Batteries are testing good and have been replace in the last 6 months.
it seems like it is getting power from another source to cause this????
Has anyone else seen this and found out what is causing this?:face palm:

[Skip426]

Contact Freightliner , for a wiring schematic for your chassis .
Look for a diode in the alternator activation circuit , within 8/10 inches of the alternator .
In another post a member reported the diode failing would keep the engine running after the key was turned off, powering ignition circuit items. .
Another post, a member reported a radio internal issue between the memory fuse and the ignition system caused all sorts of issues , including engine wouldn't shut off.