i know this sounds dumb but we have the remote wire in the amp, now where in the head unit does this wire go?

 

You can pretty much tap it into any power source that comes on with with accy power.... ciggy lighter... whatever

 

I am not sure of your question- are you asking where in the stock headunit do you connect an amp remote turn on wire?
IF SO- then you might want to do a search on the topic. It is a pretty regular/periodic question.
In short there is no direct remote out wire on the stock headunit.
There are two fields of thought, one- do as suggested, and connect to any fused wire I.E. one that gets power when you turn on the car, and the power goes off when you turn the car off. Down side is that the amp is on all the time the car is running, stereo on or not.
Second method is to use a power sensing relay and hook into one of the stock speakerwires coming out of the headuint. Turn on the headunit, the relay picks up the current and then provides power to the remote wire, and presto the amp comes on. This is a more "professional install" solution. If you are handy, you can build the relay pretty simply using our friends at radio shack for the parts, or a buddy of mine David Navone sells really nicely built relays on his website.
Some folks might suggest using a switch, but the odds are good that someday you will forget to turn the switch off and run the battery down.
Good Luck and let us know what you choose to do!

 

If you have an aftermarket H.U. then most likely it's the blue wire, but I guess it depends on the model. Lastly, my Alpine has a wire diagram on the bottom <or is it top?> of the chassis.

MisterT

 

i just took the remote wire from my HU (alpine 9813) and ran it to a switch then to the amp.. that way I can listen to the radio with or with out the sub on...

 

It's usually the solid blue or the blue with white stripe 99% of the time. Good luck.