headunit in 2002 chevy trailblazer

Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=22074
Printed Date: May 16, 2024 at 3:14 AM

Topic: headunit in 2002 chevy trailblazer

Posted By: Elliesguy
Subject: headunit in 2002 chevy trailblazer
Date Posted: November 28, 2003 at 10:41 PM

I have a 2002 chevy trailblazer. The headunit stays on when you take the key out till you open the door. I'm trying to hook an amp up, but cant locate the wire that is hooked up to the radio that turns it off with the doors, I've tried the orange wire, but nothign happens, if anyone can help , that woudl be great, thanks

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EJU

Replies:

Posted By: forbidden
Date Posted: November 28, 2003 at 10:54 PM

The vehicle has a RAP wire - retained accessory power, I would suggest that you take your remote on power direct from the ignition line under the steering wheel assembly. It should be a pink wire. The wire should meter 12volts with the key in and turned to on or running.

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Top Secret, I can tell you but then my wife will kill me.

Posted By: bberman1
Date Posted: November 28, 2003 at 11:06 PM

How to retain door delay for your radio on GM

The RAP (Retained Accessory Power) relay is in the driver's side fuse box.

Pull the relay halfway out, so it still operates, but you can carefully slide a test light or meter against the terminals.

Test the terminals until you find the one that operates correctly. I think it is terminal #30, but not sure. If you don't have a tester, you could connect your amp turn-on wire to each terminal and try each one until it works right...it would take longer this way, but you won't hurt anything even if you get the wrong terminal.

After you have identified the right terminal, wrap a wire around it and reinsert the relay. Connect a small inline fuse---1, 3, 5 amps----whatever you have on hand. Then connect the amp's turn-on wire to the other side of the fuse, and you're done.

The reason for the fuse is so that if your amp-turn on wire shorts out sometime in the future, the fuse will blow and of course your amp will shut off, but at least the rest of the car's accessories will remain operational until you can repair the problem.

Posted By: forbidden
Date Posted: November 28, 2003 at 11:09 PM

Good idea from bberman should you want to go in that direction, solid info.

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Top Secret, I can tell you but then my wife will kill me.

Posted By: Elliesguy
Date Posted: December 01, 2003 at 8:49 PM

Thanks so much for all the info.. its been driving me nuts

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EJU

Posted By: bberman1
Date Posted: December 01, 2003 at 9:38 PM

Your Welcome

Posted By: bassam_zaman
Date Posted: December 02, 2003 at 6:57 AM

hey Elliesguy, thats the same wire i used on my 2002 chevy trailblazer, its the best way togo. You amp will turn on when the key is on position, and also whne the car is running.

Posted By: Elliesguy
Date Posted: December 29, 2003 at 5:04 PM

I"m not finding any drivers side fuse box? there is nothing there.. if there is i can't find it. Help! is it in another fuse box?

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EJU

Posted By: Elliesguy
Date Posted: January 07, 2004 at 9:18 PM

I have a 2002 chevy trailblazer. The headunit stays on when you take the key out till you open the door. I'm trying to hook an amp up, but cant locate the wire that is hooked up to the radio that turns it off with the doors, I was told that i coudl tap into the (rap) wire. Retained power accessory wire. I cant find it. It was said it was on the drivers side fuse box.. I can't find that.. Please Help,

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EJU

Posted By: sparkie
Date Posted: January 07, 2004 at 9:40 PM

The radio doesn't have a wire you can use. The radio is controlled by the BCM in the vehicle on a data wire. Either use the brown accessory wire off the ignition switch to turn on the amp or if you want a 12 volt + source that is controlled by the retained acc. power circuit you must find a green wire in the rear fuse block area. It is the output wire from the retained accessory power relay. It stays at 12 volts + until a door is opened. It powers the sunroof.

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sparky

Posted By: bberman1
Date Posted: January 07, 2004 at 10:21 PM

How to retain door delay for your radio on GM

The RAP (Retained Accessory Power) relay is in the driver's side fuse box.

Pull the relay halfway out, so it still operates, but you can carefully slide a test light or meter against the terminals.

After you have identified the right terminal, wrap a wire around it and reinsert the relay. Connect a small inline fuse---1, 3, 5, 7.5 amps----whatever you have on hand. Then connect the amp's turn-on wire to the other side of the fuse, and you're done.

Also, the RAP relay is probably protected by a very large fuse, which might not even blow out if your wire shorted...meaning your wire would melt and possibly catch fire.

So I'm not trying to frighten you or anything, just be sure to put that fuse inline right near the RAP relay.

Posted By: Elliesguy
Date Posted: January 08, 2004 at 7:08 PM

bberman1- Your recomendation sounds good, but i can't find the drivers side fuse panel.. do you mean drivers side uner the rear passenger seat? if so .. is it labled? or is it just there? thanks for everyones help

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EJU

Posted By: Elliesguy
Date Posted: March 01, 2004 at 9:45 AM

I've been trying to hook my remote turn on wire to the green wire, as described in the above advices, but nothing happpens, all that happpens is that the amps stay on , even after i open the door. Any recomendations? I've been tryign to do this for a while now, and all i want is to hook up my amp to intergrate with the radio, thanks for any advice.

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EJU