how to connect amp to factory radio
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=19419
Printed Date: August 26, 2025 at 9:49 PM
Topic: how to connect amp to factory radio
Posted By: peteravelar
Subject: how to connect amp to factory radio
Date Posted: September 28, 2003 at 11:48 AM
can anyone help me im trying to connect a cobalt 260 to a factory head unit in a 2002 cavalier but every time i olug the rcas into the amp its like my remote kicks out because my amp shuts off and i tryed my alipine eq and my sound goes away and so do my door chimes can anyone hep me ?????????
Replies:
Posted By: Velocity Motors
Date Posted: September 28, 2003 at 3:28 PM
Where are you getting the RCA's from for plugging into the amp ? Do you have an LOC ? If you retained the OEM radio, you should not have lost anything like door chime or other OEM functions. ------------- Jeff
Velocity Custom Home Theater
Mobile Audio/Video Specialist
Morden, Manitoba CANADA
Posted By: peteravelar
Date Posted: September 28, 2003 at 3:54 PM
what do you mean by loc? i first hooked up the eq to the constant off the factory radio and the ground off the same place and the remote to the power antenna but still with the doors and the rear or the head unit plug the rcas into to the eq from the high to low and get no sound off of my speakers and no chime then i decided to remove the eq and just run it direct from the high to low to my cobalt 260 but when i plug the rcas to the amp the amp now shuts off
Posted By: Velocity Motors
Date Posted: September 28, 2003 at 4:08 PM
The OEM radio doesn't have RCA plugs. An LOC is a line out converter that converts speaker signal to RCA connectors. If the input sensitivity is too high, the amp will shut down to protect itself from shorting out.
-------------
Jeff
Velocity Custom Home Theater
Mobile Audio/Video Specialist
Morden, Manitoba CANADA
Posted By: Chris Luongo
Date Posted: September 28, 2003 at 6:34 PM
And the 2002 Cavalier's radio is part of the car's Class II databus. There is no type of switched power avaialable at the radio.....not key-switched; not power antenna either.
Posted By: peteravelar
Date Posted: October 06, 2003 at 5:35 PM
i finally got it to work all because i was connecting the high to low behind the radio and it had to be in the trunk and yes i found a remote line off the factory radio amp turns on and off when i turn on or off the radio
Posted By: mobile E
Date Posted: October 06, 2003 at 6:02 PM
OMG , my friend has the exact car and this model has like half of the electronic functions like door chimes and interior lighting in the friggin deck, so if youre trying to mess with it... DONT , lol, get a pro to do everything, i know i might seem wrong, but think of this.. GM doesnt want you to replace the stereo or even mess with it... so they make it an ass to replace or even mess with, my friend is getting a new deck for his ride and he has mount it in the trunk!!! just becuase it houses so many funcitons for the car!!!
Posted By: peteravelar
Date Posted: October 11, 2003 at 2:06 PM
or he can buy a wiring kit wich also has a speaker under the dash so you can get your door chimes back
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