For OLD GEN RADIOS which share TV and Nav Voice on the same input:

Check wiring of the audio output of the nav:

Nav blue plug:
Pin 9 = voice signal, blue/red wire, goes to pin 3 of the TV tuner (video module) white plug
Pin 18 = voice ground, blue/brown wire, goes to pin 12 of the TV tuner white plug

Check in particular that:
a) the wires are not reversed
b) that the voice signal is not shorted to ground (measure with ohmmeter on high ohms range)

For NEW GEN RADIOS which have different TV and Nav Voice inputs:

Check wiring of the audio output of the nav:

Nav blue plug:
Pin 9 = voice signal, blue/red wire, goes to pin 5 of the small connector on the radio tuner (radio module) main plug
Pin 18 = voice ground, blue/brown wire, goes to pin 11 of the small connector on the radio tuner (radio module) main plug

The problem is not on the blue plug, it is within the quadlock connector into the BM54 radio module.

Terrymcg is correct

The problem is in the radio quad plug

I have a spare retrofit loom here for an X5 for nav upgrade with TV already fitted

It has the 2 nav connectors (blue and purple) and a radio quadlink connector with the inputs

Need to be looking at the radio connection

Hi

Im having the same problem as Terry, I did a Nav retrofit using the TV loom, all works apart from the Nav Voice.

Can you explain in detail (or even photos) what you did to sort this

many thanks

Jon

guess this wasn't solved? I'd like the same info as Jonny C, did you fix yours yet?

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2005 LeMans Blue e53 4.8is
MODs
///LeMans Blue RBs///Intravee II///Sirius///ACS Spoiler///AiB v3///HID Fogs///LED Tails///
///215 20" Ferric Gray///MTEC Pedals///DVD Headrests///SMG M Wheel///AFE CAI Stage 2

Terry,

If you solve this problem please let me know how. I retrofitted sat nav and didn't want the TV module, so plugged the MK-IV nav unit into the TV plugs. The exact same problem, can hear the radio or cd volume reduce but no audio from the sat nav. Been trying for ages to locate the problem, I'm pretty sure its wiring but can't find the answer !!!
rgds
Mark

msymons - it will be a simply wiring issue. Use the wiring diagram and ensure that the nav sound is wired to the nav input of your system

You must have a new-gen radio module, because the old-gen share TV and nav audio on the same input, where as new-gen have a different input for nav sound

So simply connect the nav sound from the nav to the nav voice input of the radio

The wiring diagram says it all!

Thanks KiwiJochen,

Presently working away from home but can't wait to get back and get it sorted, will let you know how I get on. The car must be one of the last E46's as its registered june 2006, so would imagine it is the newre radi module.

Rgds,
mark