Hi Jeremy,

Sounds like the ELK 800 output connection is not connected, (to anything).

Simple way to test for sound, is connect single speaker up to the audio output from the ulf (or ELK 800 output).

The OEM BT audio out is connected via the "AUX in" connector on the back radio. (one of the smaller connector blocks)

I'll assume you have the 17 round pin connector.

for 17 round pin Connector

ULF Audio Tel +: 10 Pin Connector X01037 or X13321: PIN 8
ULF Audio Tel -: 10 Pin Connector X01037 or X13321: PIN 3



for 40 pin Quadlock.

ULF Audio Tel +: 12 Pin Connector X13649: PIN 6
ULF Audio Tel -: 12 Pin Connector X13649: PIN 12




Hope this helps

John

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Sept 03, M3, Silver Grey. Retro-fits: Modded Mk4 DVD Drive, OEM Bluetooth, VR Control, Rainbow Speaker Upgrade, Sony SOT Amp, HK Sub, CCFL, Intravee II, NightMode.