Re: head unit nightmare!! –
27-09-2008,11:08 AM
Originally Posted by
m40mfa
hi all,,,i have a 03 plate a4 cabriolet and have changed the head unit to a sony xplod bluetooth unit but for some reason cannot find a switch live and the bluetooth is not working properly i have searched high and low for the correct leads to plug and play does anyone have any suggestions or had the same prob????
Ideally, you will need to run a switched ignition live from the fuse box.
Audi's of this age rely on CAN-BUS signals to switch on their head units - hence the continuous live +12v currently at the head unit.
I found a spare fuse slot and introduced a switch live from an adjacent feed for other accessories, like my Snopeer and originally my TomTom, which I had hardwired.
See pictures of my fusebox - Note the red 4A fuse amongst the larger ones!
I used a "blue" flat male spade connector to tap off the ignition +12v rail in the fuse box - I used a couple of wires from an old Nokia car phone kit which had a pre-crimped female spade connector that actually fitted in the fuse box receptacle - you need to pull out the relevant purple retainer strip to fit the new fuse connector.
A4 3.0 Quattro Sport Tiptronic (51) Platinum Leather/Heated Front Seats/BOSE/DIS/Cruise Control
Retrofits: S-Line Bumpers, Amb F&R LEDS, Xenon HID's (slimline) & Headlight Washers, Auto-dipping RVM, Footwell Lights, Parrot CK3100 BT, RNS-E + Video i-pod + Aux inputs, Rear PDC, ISO-FIX, VCDS HEX+USB+CAN (VAG-COM)