I have a 82 300SD with a Kenwood head unit installed by the previous owner. Only issue is whoever that installed it mucked up everything. The radio memory intermittently worked when I first got the car, now it doesn't work at all.

Armed with the color codes Hit Man X has posted, I kept my eyes out for the following:
Brown = ground
Black w/ tracer = switched 12v
Red w/ white tracer = constant 12v
Violet = dimmer


What I found was the following:
-No Red wire with white tracer
-No violet wire
-2 Black wires with green/yellow tracer going to ignition wire on the radio
-Brown wire goes to the ground on the radio
-A blue switched +12V wire that was spliced to go to the constant wire on the radio
-And a blue wire spliced from the antenna switch to the antenna control on the radio.

In between some of those, the wire was spliced several times, resulting in a mix of colors.

If anyone can give me some assistance with this, primarily where to find the constant 12v, it'd be greatly appreciated.

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Jason

00 Subaru Legacy (fun wagon)
96 Nissan Sentra (disavowed)
82 300SD (garage queen, will run again hopefully)
87 300DT (Gone: 10/15/2010)