HI all

Just bought a 2007 L322, but there is no power going to any of the rear modules via the pair of 10 amp fuses in the RHS rear quarter.

If i apply a hot wire bypass with the fuses out, everything powers up and all works fine.

Battery was a bit flat, its on charge as i type, but checking with a meter still has no voltage at the input side of the fuse when the car is running.

I swapped ofer the relays in position 1 and 2 but that made no difference. Checked all voltages via the wiring diagrams, and there is no feed to the switch side of the infotainment relay which should be coming from the head unit

Ive read a few threads but not seen one with a resolution.

Any ideas before i apply a permanent bypass with inline fuses

Well if anyone else gets these symptoms...

Faulty IHU module (behind lower glove box) not pulling the infotainment relay down to earth to power up the rear modules

New IHU and all working as it should.