idiazhd16

Factory harness was cut out and I'm attempting to install aftermarket head unit. I've looked at some online but they don't seem right because they say the 12v constant is Yellow but I don't have a yellow wire in the dash. Also it says orange is the switched but I have two oranges. Just would like someone ms advice that also had to hardwire, or is there an easier way to do what it sounds like I'm trying to do? Thanks all

a55bruce

A meter or test light should tell you which Orange wire is the 'always ON', the other orange wire is for the 'DATA LINK' serial communication.

idiazhd16

Just picked up a volt meter! So the always ON is also known as the 12v constant? Or am I mistaken? I have to hardwire my stereo in my 01 impala and I'm a big DIY guy so all the advice/help that I can get is much appreciated.

idiazhd16

what exactly is the 'DATA LINK' serial communication wire used for?

a55bruce

Yes, the always ON is the same as 12V constant. The DATA LINK is a communication system for the computers & devices in your car to talk to each other.

tech2

for an aftermarket stereo head unit...do not connect anything to the communication wire or you may bring down the entire class 2 circuit. It is only used for oem head units.

idiazhd16

would you happen to know if I have to fuse tap the red acc wire from my aftermarket stereo into my fuse box?

tech2

no. all the required wires are there at the radio connector. you do not have to run anything to the fuse panel.

idiazhd16

have you ever done a hardwire on a 2001 impala? If so, can you tell me which is the 12v switched?

a55bruce

If you can't find the 12V switched wire with your voltmeter, you may be able to use the auxiliary power drop (cigarette lighter). Check first to see if it is 12V-switched power.