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Discussion Starter #1
hey guys, this project is becoming more of a promlem then enjoyment.

I installed my head unit, Alpine 7874, anyways, the thinkg wouldnt work with the sub, I did what morning said, got a relay, then wired it up to the remote wire going to the sub. It worked beautifully, for about a week.

Now this mornin when I turn the stereo on, it started to go on and off really fast, and I couldnt turn it off, all I hear is the relay going on and off, when I ungrounded the relay the stereo worked fine (without sub).

I used my friend relay too same thing happened. What happened all of a sudden?

thanks (sorry for the long ass post)
 

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Discussion Starter #3
the sub isnt the prob (at least i dont think, worked fine before). The prob is something else i think, something in the wiring. Although everything cheks out.

The head unit has RCA goin to the amp as well as a remote to turn the amp on. thats it.
 

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I got the same cd player and i have never had this problem. Are you sure you got just the sub wires going from the subs to just the amp. I know some people take speaker wire and run it from the back of the cd player to the subs and from the subs back to the amp, but i'm sure you probably haven't done that.
 

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Discussion Starter #6
no i did everything as I should have.

theoretically it should have worked just by running the blu/white wire to the sub and solid blue to the power antena remote, but it wouldnt work, the sub would go off like 10 min after playing and the power antena wouldnt go up.

When I used a relay, it worked for a week, no it just makes everything go on and off every 1/2 sec. (really fast)

I don't know what is going on. this is my setup maybe someone can help me out.

Alpine 7874/ Alpine s603 Changer/ Rockford 400W amp

Head unit is hooked up with an adaptor, I matched all colors, all the connections are good. There are 2 remote wires, one for amp one for antena, both are connected to the right one. There is a 12v relay on the remote goin to the amp, the relay gets the power from the yellow wire (friend said to use that as power.)

Also, the yello wire came with a filter, (friend said not to use it, so i cut it off)

btw my friend is a pro car audio guy, he just moved to SC so he can't help me out.
 

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i don't know if it's the same problem my buddy had but his stereo used to work when it wanted to, and it was just a materr of a loose connection . check the ground on the amp
 

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Discussion Starter #11
other aftermarket stereos worked before fine, the remote wires arent faulty, I exchanged the head unit and had the identical problem, unless both can have identical defects.

it's deff a power draw prob, the head unit is turnin on then off, I used the yello wire from the harnedd fort he relay, perharps I would need an alt power source.

thanks for the replys
 

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Discussion Starter #13
well I used an alt. power source and it started to fry the remote wire to the amp, the plastic started to buble and it was smoking a lot, so I think its about time for me to go to a shop and get it done, unless someone has any info that would help me out here.
 

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Check this, I used to have a 7874 and i had no problems at all with it and had it hooked up like this. I now have a alpine 7863 and its hooked up the same

pic here
 
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