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This is usually the result of connecting both ORANGE and RED 12VDC (+) wires to a "switched" source (meaning it is powered only when the ignition is in the on / run / accessory position).
The radio instructions specify the following connections:
Orange = +12V constant Red = +12V switched Black = ground Blue/white = remote on Green/Black = Left Front - Green = Left Front + Grey/Black = Right Front - Grey = Right Front + Black/White = Right Rear - Grey/Red = Right Rear + Black/Green = Left Rear - Green/Red = Left Rear +
If you disconnect the ORANGE wire from whatever you have it currently connected to - and connect it directly to the battery's 12V (+) terminal (or other source that has 12V (+) with the key removed), your station memories will be retained.
Leave the RED wire where it is, so that the radio will shut off whenever the key is taken from the ignition - and you won't be stuck with a dead battery in the morning.
The blue wire, if you've not got a corresponding blue wire to connect to can be connected to the ignition wire. That being one of three needed to power your head unit - RED (12v permanent), BLACK (negative / earth) and another colour, sometimes blue for 12v ignition (only comes on with the ignition on / acc).
Here are the wiring codes for the VT, VN-VT Commodores:
Accessory (12V) Yellow
Battery (12V) Orange/White
Ground (earth) Black/White
Antenna power (12V) Yellow/Red
Front Left + Tan
Front Left - Grey
Front Right + Light Green
Front Right - Dark Green
Rear Left + Brown/Black
Rear Left - Yellow/Blue
Rear Right + Blue/Orange
Rear Right - Blue/Black
Antenna Up White (VR-VT)
Antenna Down Blue (VR-VT)
Phone Mute Yellow/Black (VT)
Dimmer In (12V) Brown/White
Dimmer Out (12V) Grey (VT)
I am about to sell one on eBay - here are the connections from the installation paperwork and connector that I have:
Top row, left to right:
White - Front Left (+)
Green - Rear Left (+)
Purple - Rear Right (+)
Gray - Front Right (+)
Blue/White strip - AMP REMOTE (Max 0.3A)
Blue - ANT REM (Power Antennta Remote) (12V, Max 0.1A)
Red - Power (Accessory)
Black - Ground
Bottom Row, left ot right
White/Black - Front Left (-)
Green - Rear Left (-)
Purple - Rear Right (-)
Gray - Front Right (-)
Yellow - Power (Battery)
One of the BLANKs is for the "Light Blue - ATT (attenuation for car phone)", but it is unclear which one. This wire is not on my connection block...
The circular BUS line to the right of the terminal block is apparently for linking to a CD/MD unit (cable supplied with unit)
The Blue 3.5mm socket is for the RM-X45 Rotary Commander (which attaches to the indicator lever)
If there is no ACC power line in the car, do not connect the red lead.
Ensure the power select switch on the bottom of the unit is in the B position, then press the RESET button (behind the faceplate).
This means that the display will be off when the unit is not in use - avoiding a flat battery risk.
(Posn A is for normal use, with red line on ACC)
The RESET buttom should be pressed after installation, before initial use.
THE FIAT BRAVO HAS A STANDARD ISO CONNECTION WHICH SHOULD PLUG INTO MOST AFTERMARKET STEREOS AND THEREFORE YOU WON'T NEED TO KNOW THE COLOUR CODE, IF THERE ISN'T ANY PLUG ON THE STEREO BUY AN ISO PLUG THEY'RE NOT EXPENSIVE AND CONNECT IT TO THE RADIO AND JUST PLUG IT INTO THE CAR HARNESS, YOU DON'T REALLY WANT TO CUT THE CAR'S WIRING