From the last year I have installed an amplifier and a subwoofer in the rear.
The electrical & sound wiring passes through the driver's side, and where the FRM module is.
When the audio is on, it seems that the electrical & sound lines there interfere with the FRM functions. Noises are heard on the speakers and the hazard warning button/lights stop working.
The way to solve this is very simply: just by moving or pressing the plastic cover in the FRM area with the hand or the foot is enough to remove noises and get the wizard warning light working again.

I have tried to isolate the FRM from the electrical & sound cables with 3M electrical tape but that has not solved anything.
I have also made an "isolate cover" done with electrical tape but it has not worked either.

What material do you recommend to get the electrical & sound lines isolated from the FRM module so they don't interfere in its operation?