Aftermarket Head Unit, JBL no sound

Hey guys, I’m having a problem with my sound. I have a 2010 Tundra DC Limited with the JBL system. I upgraded the head unit about a month ago to a Kenwood Excelon DDX6905 and used the idatalink maestro to retain my factory amp. Everything has been working perfectly. About a week ago I noticed the speakers would cut in and out, both while driving and idling. They’ll work for a few minutes then gone, no crackling or popping sounds, it’s just gone. I’m thinking my amplifier is bad, any other thoughts?

 

I went into my maestro settings on the head unit and under amplifier it has an arrow indicating Amplifier Not Detected. I’m assuming this is the issue.

 

Check the ground....

 

Behind the head unit?

 

Amp ground...