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Power Wires

 
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Old 09-03-2013, 10:22 PM
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Power Wires

I just installed a new head unit (Sony BT3100P), but now I have a couple problems.

1. I have almost no power without the key in turned in the ignition. The lock switch doesn't work without the key in and the map light does not turn on when I open the door like it should. But the map light does turn on when I turn it's switch to on without the key... Only wires I messed with were the ones on the harness. Where did I fudge up?


2. The head unit would not turn on unless I held the red wired in contact with one of the speaker wires (I chose purple). Why????


I connected the wires by crimping on male/female connected and then wrapped them in electrical tape to cover the exposed metal.
The harness coming off the new head unit (that came with it) did not have an orange wire to pair with the orange coming from the other harness. I believe that's just the dimmer, so it shouldn't affect things too badly, right?

Please let me know if there's any other vital info that I left out.
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Last edited by trantommyd; 09-03-2013 at 10:29 PM.
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Old 09-04-2013, 05:57 AM
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Re: Power Wires

Yeah orange wire is just crap pretty much, just cap it or tape it and out it aside.
Yellow is power
Red is your ignition, I've never herd of it working when in contact with your speaker wires, but perhaps check your fuses?? Maybe that's why ignition isn't working for you.

Dome light?? Idk bud
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Old 09-04-2013, 09:55 AM
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Re: Power Wires

of course, i should have checked my fuses.

I'll get to it later tonight after work.
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Old 09-04-2013, 06:15 PM
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Re: Power Wires

so can anyone tell me which wire behind the head unit allows the car to keep track of the time? my clock resets itself when turn the car off for a while, just as if it's resetting itself when i disconnect the battery to work on electronic stuff
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Old 09-04-2013, 11:37 PM
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Re: Power Wires

it was a freakin fuse. the "clock fuse" to be exact.

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Last edited by trantommyd; 09-05-2013 at 10:44 AM.
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Old 09-05-2013, 02:37 PM
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Re: Power Wires

You need a continuous 12v power source.
You should get a copy of the manual and check the wiring diagrams.

As far as head unit powering on only when you touched a speaker lead, you have a ground issue in your setup.

Just because your new head unit has similar colored wires in its harness, does not mean that they should be connected to the same color wires in your car!
Check the wiring diagrams and you should be able to find the problems.
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Old 09-05-2013, 05:53 PM
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Re: Power Wires

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Originally Posted by trantommyd View Post
so can anyone tell me which wire behind the head unit allows the car to keep track of the time? my clock resets itself when turn the car off for a while, just as if it's resetting itself when i disconnect the battery to work on electronic stuff
i think that goes with your ignition sources as well, or the blue remote wire. i forget, but one of those usually holds the signal to keep the time.
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Old 07-27-2014, 03:39 AM
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Re: Power Wires

Ugh....

First: your crimps are awful. Id say do them over. For sake of argument, female/male spade connectors so there is no doubt that the crimp is the problem.

Second: Follow your colors each speaker is its own color pair: green solid and green with black line is one set. Purple solid purple black line is too. So on and so forth. So there should be 4 pairs: white/grey/green/purple.

Third: watch your blues: one says "always on" there is another that says "ant power" NEVER USE "ANT POWER."

Orange: dimmer line. You run that line to the roller if you want the radio to also dim out with the gauges.

Redo those crimps and get back to us. One ground out will give you the grief
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Old 07-27-2014, 09:14 AM
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Re: Power Wires

Molex connectors or bust! I downloaded their brochure and WOW do they put a lot of little things into their connectors only a propellerhead would notice.
And crimpers matter. Go to sears and get the good ones.

Chris, Ima use your post to go by if I ever do the aftermarket thing.
And I have the electric manual lol.
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Last edited by bykfixer; 07-27-2014 at 09:18 AM.
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Old 08-11-2014, 05:50 PM
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Re: Power Wires

Quote:
Originally Posted by Sideswipe SI View Post
Ugh....

First: your crimps are awful. Id say do them over. For sake of argument, female/male spade connectors so there is no doubt that the crimp is the problem.

Second: Follow your colors each speaker is its own color pair: green solid and green with black line is one set. Purple solid purple black line is too. So on and so forth. So there should be 4 pairs: white/grey/green/purple.

Third: watch your blues: one says "always on" there is another that says "ant power" NEVER USE "ANT POWER."

Orange: dimmer line. You run that line to the roller if you want the radio to also dim out with the gauges.

Redo those crimps and get back to us. One ground out will give you the grief
I agree about the crimped butt connectors... I avoid those like the plague! I personally believe in buying those "Metra" or "Axxess" aftermarket wire harnesses and SOLDER the wires to the radio harness wires that comes with your aftermarket radio. Make sure to use the correct size Heat shrink on each connection to keep the corrosion out... You ask my reasoning?

Road vibration alone can cause problems with crimped connections, and even more-so if you have a system that bumps. You'll also get better clarity in your sound if you solder the speaker wires and better power distribution to your head unit if you solder the ground and power wires.

ALSO, I hardly EVER use the stock ground wire. I like to put a terminal lug on the ground wire coming directly off of the aftermarket radio harness. Then you find a nice solid chunk of metal behind the radio, make sure its nice and clean, and either loosen a screw near there and put the lug under that, or use a self tapping screw to secure it to that clean bare metal spot. You can tie that ground to the stock radio harness ground if you like. The BEST way to make sure your unit gets enough power, especially if you have a high power head unit, is to run a fused hot wire directly from the battery to right behind your radio, and connect that power through a relay. You will then connect your ACC or Ignition power (Red wire) to the coil of the relay so when you turn on the car, it energizes the relay, which then connects the battery power directly to your head unit. You can also connect your Memory/Clock wire (Usually yellow on an aftermarket unit) to that battery voltage you just ran.

Hope this helps and clears up some of your questions.
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