Amp wont turn on
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=10186
Printed Date: September 13, 2025 at 9:20 AM
Topic: Amp wont turn on
Posted By: the_grand_prix
Subject: Amp wont turn on
Date Posted: February 27, 2003 at 9:57 PM
Today i hooked up(or should say tried to hook up) my amp and sub in my 90' Grand Prix. For some reason it wont turn on. all my connectinos are clean. anyone know what i could do to fix it?
Thanks
-------------
-Adam
Replies:
Posted By: ViperATC5
Date Posted: February 27, 2003 at 10:09 PM
the connections may be clean, but have you tested with a DMM too see if you are getting 12V Constant and Switch and that you have a good ground? If you have these checked these connections and are getting voltage, contact the manufacturer of the amp for service
Posted By: wvsquirrel
Date Posted: February 27, 2003 at 10:11 PM
Check your grounds and your remote line. Use a DMM and test the voltage of the remote line at the HU and at the amp. Are you using the factory HU or an aftermarket? Did you hook the remote up to the remote turn on wire at the HU, or to the power antenna wire? ------------- Squirrel
"No more Cpt. Kirk chit chat"
If its too loud, then you're too old
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Posted By: the_grand_prix
Date Posted: February 28, 2003 at 10:44 AM
I have the power antenna wire hooked up right off the HU. Its an after market HU. I'll try testing acouple of those things.
Posted By: esmith69
Date Posted: February 28, 2003 at 11:04 AM
Does the amp turn on when you are playing the radio? If so, then you need to use the amplifier turn-on wire (it's usually blue/white instead of the power antenna's all blue wire). Some head units have fuses built in to the remote turn on line, and it is possible that yours may have blown. Usually they're in a lil plastic in-line tube thingy and you can't tell if its blown or not unless you open it up. Of course if you have a multimeter, it makes testing all these connections a lot easier.
Posted By: the_grand_prix
Date Posted: February 28, 2003 at 12:43 PM
I was looking at my wire harness and it only has the power antenna wire. There isn't an amp turn on wire(just the all blue one). I changed the fuse on the amp but that did nothing. The amp has power, the 12v wire is hot but it just wont turn on
Posted By: thepencil
Date Posted: February 28, 2003 at 1:11 PM
From your harness you should have a (Switch / Accessory) red wire. Used this wire and run it to your amp. remote. Check it with a multimeter first. You should get a 12 volts reading with the inition switch on. ------------- Be careful whose advice you buy, but be patient with those who supply it. 
Posted By: the_grand_prix
Date Posted: March 01, 2003 at 10:45 AM
Thanks for all the help guys. Got it all hooked up and its running like a charm now. If only it were louder! We'll save that for another day though.
Posted By: bigmikeww
Date Posted: March 02, 2003 at 7:38 PM
so what was wrong? 
Posted By: customsound
Date Posted: March 02, 2003 at 8:16 PM
If all else fails, try hoking your remote turn on directly to the ignition harness. Be sure to use a DMM to get the correct wire for 12v acc.
Posted By: the_grand_prix
Date Posted: March 03, 2003 at 9:36 PM
The power antenna wire wasn't turning my amp on so i hooked it directly to the 12v switched wire
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