stereo wont work?
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=29346
Printed Date: May 29, 2024 at 12:46 AM
Topic: stereo wont work?
Posted By: Shootem up870
Subject: stereo wont work?
Date Posted: March 30, 2004 at 6:07 PM
ok i tried to test my stereo to see if it worked in my truck. i plugged the harness i bought into the factory harness. then i plugged in the antenna. i held the stereo in my lap and turned on my truck and the display lit up. i tried pushing the power button and still nothing, it just stayed the same. i hit the reset button behind the faceplate and still no change. i turned my truck back off then on again. unplugged then plugged back in the harnesses. the memory wire is not connected but the accesory wire is. what am i missing hear. i cannot think of anything??
Replies:
Posted By: lagatbezan
Date Posted: March 30, 2004 at 6:09 PM
You need to connect the memory wire for the radio to work.
Posted By: Sweekster
Date Posted: March 30, 2004 at 6:29 PM
Yeah, you have to connect the memory (constant 12 volt) wire (usually yellow) and the switched accesories (Acc 12 volt) (usually red) wire for the radio to work. Since you have the adapter plug harness...just connect all the wire on your radio to all the wire with the matching colors on the adapter plug (some wires you may not have to connect like power antenna and the illumination wires). And, if there is nothing wrong with the radio it should operate normally. ------------- Duane...
If you think you're confused, imagine how you feel. 
Posted By: Shootem up870
Date Posted: March 30, 2004 at 6:31 PM
ok. for some reason i thought that it would work without the memory wire but with the ignition wire only plugged in. i thought i would just not be able to save the stations.
Posted By: superstreet786
Date Posted: March 30, 2004 at 7:43 PM
Yea you'll always need a constant for any deck, it will work if u have a constant with a switch but it wont work at all if u dont hook it up
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---- 1996 Chevy S10 ----
1 Lightning Audio S2.600.2 Amp
2 Lightning Audio 12" Subs
1 Lightning Audio 1 Farad Cap
Posted By: Clean Install
Date Posted: March 30, 2004 at 9:08 PM
if I remember, I think that the constant wire was orange....just match all the wires from your HU to your new harness and everything should be good to go
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If we learn from each success and
each failure, then we can improve ourselves
Posted By: Shootem up870
Date Posted: March 30, 2004 at 9:27 PM
there wasnt a constant wire at all
Posted By: Clean Install
Date Posted: March 30, 2004 at 9:31 PM
well you should be able to find a wire under the dash, that you can use for the constant...you had a multimeter didnt you?
-------------
If we learn from each success and
each failure, then we can improve ourselves
Posted By: DYohn
Date Posted: March 30, 2004 at 11:26 PM
What HU are you installing? There is ALWAYS a constant. It may be called "memory" especially if you are using a JVC. It's the wire with the fuse on it from the factory. Are you sure the harness adapter you bought is the right one for your vehicle? A multimeter is a very basic and handy tool.......
Posted By: Clean Install
Date Posted: March 30, 2004 at 11:33 PM
DYohn its a 87 fullsize chevy I beleive....in a previous thread he stated that he was told that there was no reason for there to be a constant wire...(im assuming that the factory stereo did not have a clock or station preset)
-------------
If we learn from each success and
each failure, then we can improve ourselves
Posted By: DYohn
Date Posted: March 30, 2004 at 11:54 PM
Gotcha. But in an 87 Chevy, constant +12V is orange and switched +12V is yellow. So there should be an orange wire, and the "memory" lead from the HU should be connected here - along with the "Battery" lead if there is one. If there is no orange wire in the vehicle, it has been modified or it is a non-standard setup. Use the recomended trusty multimeter (Thank you John Fluke) to figure out which it is. There has to be one.
Posted By: Shootem up870
Date Posted: March 31, 2004 at 6:33 AM
CLEAN INSTALL wrote:
DYohn its a 87 fullsize chevy I beleive....in a previous thread he stated that he was told that there was no reason for there to be a constant wire...(im assuming that the factory stereo did not have a clock or station preset)
all true^^^ the harness that comes out of the radio has a 12volt constant wire coming out of it and is fused. there is a separate plug that came with the adapter harness for the 12volt constant. the only thing is that there is no plug for the 12volt constant to go in to
Posted By: Shootem up870
Date Posted: March 31, 2004 at 6:35 AM
and yes i have a multimeter. now how do i test again and where
Posted By: Clean Install
Date Posted: March 31, 2004 at 6:35 AM
there is a separate plug that came with the adapter harness for the 12volt constant, is that the other harness that connects to the factory harness? ------------- If we learn from each success and
each failure, then we can improve ourselves
Posted By: Shootem up870
Date Posted: March 31, 2004 at 3:36 PM
there is nothing else for it to connect into. all the wires have been connected except the yellow 12volt constant plug b/c i do not know where to connect it into. so i think i have to run a wire to the fuse and connect the12volt constant to it
Posted By: Clean Install
Date Posted: March 31, 2004 at 7:31 PM
I wish I knew where one was for you under the dash  , you should be able to find one though, you will want one that is hot at all time, except it will not be hot of course when the key is in the start position. hopefully some one sees this thread and has worked on on 87 chevy fullsize pickup, good luck I ------------- If we learn from each success and
each failure, then we can improve ourselves
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