Thanks Jochen.

To clarify - when i plug in the TCU, I can't turn on the nav monitor. No radio etc.

I'll check out the pins and compare as you suggested as well.

The TCU isn't faulty because with the previous harness I had bluetooth working fine.

Chances are if there is a difference with the US and EU specs TCU harness then I've got the EURO version harness and US version TCU (since it was in the car when i purchased it and working)

thanks again for the responses.

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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