98 Grand Prix, Aftermarket Stereo

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danrobb

Member - Posts: 3

Joined: August 27, 2002

Posted: August 27, 2002 at 7:22 AM / IP Logged

I have a 98 grand prix gtp, im installing an after market stereo. my grand prix came with and external amplifier for the rear speakers (i have located it). Well there obviously has to be a remote wire going to this amp to give it a signal to tell it to turn off and on. I need to find which one it is so i can splice and run a wire to my amplifier for the subs, there is a harness that connects to it with about 15 or so wires. I don't know which one to splice in to. someone please help.

I am only doing my install this way because atm i can't afford the head unit i want, so instead of using the one i have and going through the hassal of installing it, i'll just wait.

bberman1

Gold - Posts: 2,314

Joined: March 11, 2002

Location: United States

Posted: August 27, 2002 at 9:09 PM / IP Logged

The only way to do it is to tap into the wire harness that goes to the head unit. The wire you want to tap into is the yellow 12 volt switch wire. Here is a diagram of the harness that connects to your head unit. https://www.the12volt.com/installbay/detail.asp?info=alarm&year=2000&make=Pontiac&model=Grand%20Prix&ID=18796&type=Stereo

danrobb

Member - Posts: 3

Joined: August 27, 2002

Posted: August 29, 2002 at 11:59 AM / IP Logged

thanks, i had a diagram, just figured there would be a remote wire that went to the stock amp. Will that allow the amplifier(subs) to turn on and off with the radio?

Chris Luongo

Platinum - Posts: 3,746

This member consistently provides reliable information

Joined: May 21, 2002

Location: Massachusetts, United States

Posted: August 29, 2002 at 7:20 PM / IP Logged

Why not simply test each wire at the amp until you find the correct one?

bberman1

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Joined: March 11, 2002

Location: United States

Posted: August 29, 2002 at 9:01 PM / IP Logged

I have tried that several times. Each time I have come up empty handed. I think it is more than just one wire that turns the amp on and off. But if anyone out there has found the remote wire please let me know.

danrobb

Member - Posts: 3

Joined: August 27, 2002

Posted: September 16, 2002 at 11:38 AM / IP Logged

I ended up using the 12v switched. I ran into 1 one problem along the way. The ampilfier does not always turn on with the stereo and I think somewhere along the line something maybe be shorted because no audio even comes from the high's which is powered by the head unit. I haven't figured this out and I work at a car audio installation place and no one there has any idea why this is happening because this is the wire that you are supposed to use. I ended up having to hook up a toggle switch to the remote for the amplifier and mounted it under the driver's side of the dash. When I turn the radio on and nothing plays I simply flip the switch off then back on and everything is fine.

bberman1

Gold - Posts: 2,314

Joined: March 11, 2002

Location: United States

Posted: September 16, 2002 at 2:52 PM / IP Logged

What wire did you tap into? You should not have problems like that. I will check my notes and see what wire I used when I ran that setup and get back to you.

bberman1

Gold - Posts: 2,314

Joined: March 11, 2002

Location: United States

Posted: September 16, 2002 at 2:57 PM / IP Logged

If you give me your email address I can help you out.

NinGprix

Member - Posts: 2

Joined: October 17, 2002

Location: Canada

Posted: October 17, 2002 at 11:57 AM / IP Logged

Hey.. do you know where to get a wiring diagram for a 2002 Pontiac Grand Prix gt?

~ruiner~

NinGprix

Member - Posts: 2

Joined: October 17, 2002

Location: Canada

Posted: October 17, 2002 at 11:58 AM / IP Logged

sorry... for the stereo

(wire color codes)

~ruiner~

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Disclaimer: *All information on this site ( the12volt.com ) is provided "as is" without any warranty of any kind, either expressed or implied, including but not limited to fitness for a particular use. Any user assumes the entire risk as to the accuracy and use of this information. Please verify all wire colors and diagrams before applying any information.