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[EA37TS]

I just picked up my coach from the dealer and they installed the fourth radio. With this installation they replaced the Axxerra AV614 with an Axxerra AV615BHM and new wiring harness. I had the 614 down pat but now have a learning curve on the 615.

Question, how do you adjust the volume of the rear camera mic when driving? On the 614 when the camera was being viewed the volume control adjusted the volume for the rear mic. On the installed 615 while viewing the camera the volume control adjusts the volume for the radio and not the rear mic.

I have this nasty suspicion the tech might have wired the camera mic incorrectly but thought I'd ask before taking the top of the dash apart.