factory Amp remote wire grounded out and now head unit won't work

[nolazach]

Hello

I was installing a radio in a friends car. He had a stock amp but the blue lead to turn it on (factory pink;GM) is grounded. I like an *** did not check it first, hooked blue wire to blue/white wire. Put everything back in turn key and nothing.

Hook radio up to power source red and yellow to positive 12v, black to ground. Still nothing. Hit the reset button, nothing.

Now at first I thought the radio just died, my friend had pushed it in really hard. So I put another radio in for him, hooked up all wires as they should be and nothing. Now the other radio is dead too.

So what I think happened is that there was a short due to the factory amp remote being grounded.

What I can't belive is that there was no protection, are both head units now junk or is there a way to trouble shoot it and maybe replace something on the board.

Thanks for any help

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[iamamp3pimp 5,000+ posts]

do the radios power on?

check if factory amp is fused......im thinking the HU should be ok and amp fried if anything...

 

[528hz 10+ year member]

do the radios power on?
check if factory amp is fused......im thinking the HU should be ok and amp fried if anything...

X2

I'm willing to bet you popped a fuse. I did this with my car on my deck install too, but the amp was o.k. You should be alright.

 

[nolazach]

trust, thats what I would think too.

I have a 120-12 inverter. For powering cigarette lighter plugs. Used it to test the radios. I first hooked up an old radio I had sitting around. Yellow and red to + black to negative. It powered right up.

Tried the Alpine and the sony, nothing. I took the Sony completly apart and looked over the circut board with a magnifying glass, saw no burned out parts, nothing had that ozone smell.

Checked power on the board, many different parts are getting power, and power is goint to Blue and blue/ white wires.

I tell you it is the darndest thing. I have never seen anything like this. I feel stupid for not checking the wire first. But really the blue wire is 99.99999% of the time the amp remote.

I have at one time hooked up the blue wire to the blue wire only to have my factory amp cut off with the radio. So I understand the wirin and where it goes.

Just this truck is an exception, something is wrong with the factory amp. There is a reason why the shop he brought it to in the first place didn't hook up the factory amp. They should have told him it needed to be replaced. So now out two radios.

Worse yet, this is going to kill my car stereo creditbility, which may be a good thing because I am tired of being a go to guy for stereo installs.

 

[nolazach]

The radios do not power on at all. When hooked directly to a 12 volt source nothing happens. Voltage flows throught the circutry. There is no fuse problem here, trust me I checked that first.

In my opinion a fuse should have popped somewhere but it didn't.

Then even with the radio sitting on my table wired up, I get nothing, can't eject cd's nothing, not a single LED.