no power to the head unit

ryanthefizz · 11-21-2008, 02:00 PM

fuse is good, power input hasn't changed, can a bad ground cause it to not turn on at all?

cherrington17 · 11-21-2008, 02:36 PM

absolutely. if you can't complete the circuit, then electrons can't flow... (e.g no power)

ryanthefizz · 11-21-2008, 03:32 PM

so secured ground to a better spot and replaced the fuse and still don't have power to my head unit. any ideas? the power cable was not touched, it is connected to some brown wire next to the harness... best buy did that one several years ago.

AGT · 11-21-2008, 03:35 PM

So iyou lost power recently?

Did you just take it back to Best Buy to have them fix it?

Are you running an amp?

ryanthefizz · 11-21-2008, 03:40 PM

i am installing new speakers / amp... i ran new wires to the doors and sail panels and an RCA for the amp. None of the speakers or amp is connected at the moment. got it all wired up to the deck, connected the battery, turned on the car and the deck appears to have no power. I replaced the fuse on passenger side and ran a new ground. Still nothing, i noticed their is a fuse on the back of my stereo, can those be replaced? I can't figure out how to get it out.

my head unit is a sony CDX-GT200... install guide is here... http://www.docs.sony.com/release/CDX...tion_Guide.pdf
everything looks right, ANT REM and the yellow constant 12v are the only wires not connected to anything.

CarGodz · 11-21-2008, 03:45 PM

Quote:

Originally Posted by ryanthefizz

I replaced the fuse on passenger side and ran a new ground. Still nothing, i noticed their is a fuse on the back of my stereo, can those be replaced? I can't figure out how to get it out.

I was gonna ask if you checked the fuse under the dash or the one on the back of the head unit... Pull the one on the back as it's probably the culprit.

ryanthefizz · 11-21-2008, 03:55 PM

checked the one on the back of the stereo, it is clear, any other ideas? gonna grab a volt meter and check that wire best buy used for power, make sure it is providing enough juice.

cherrington17 · 11-21-2008, 03:59 PM

does that 12V constant wire have to be connected?

i like this one better...

edit, wrong thread

Gr1m · 11-21-2008, 04:07 PM

Quote:

Originally Posted by ryanthefizz

ANT REM and the yellow constant 12v are the only wires not connected to anything.

i think you solved your own problem....

ryanthefizz · 11-21-2008, 05:28 PM

isn't the constant power only for if you want to have your stereo on after you turn your car off? the power it is connected to now kicks on when the key is in ACC so the deck should turn on then.

Ryan from Ohio · 11-21-2008, 06:02 PM

No the constant yellow is the main vessel for all power. Thats why its a larger gage wire.

That HAS to be connected.

11-21-2008, 06:16 PM

12v constant has to be connected lol.. It doesnt keep the headunit on but it gives it power. the red 12v wire is so it does turn on.

ryanthefizz · 11-21-2008, 06:17 PM

so the red and yellow (both 12v in) need to be connected? where can I connect the yellow to get an always on connection??

11-21-2008, 06:21 PM

Quote:

Originally Posted by ryanthefizz

so the red and yellow (both 12v in) need to be connected? where can I connect the yellow to get an always on connection??

the yellow should go to the yellow on your harness. the red for me had to be tapped into a fuse. I tapped into the ignition and fused that wire. if your harness has both wires and works. then just use that :\ match color to color haha.

ryanthefizz · 11-21-2008, 06:25 PM

already cut my stock harness out, any other ideas? can I run it to the fuse panel on passenger side or anything like that?

CarGodz · 11-21-2008, 07:05 PM

Wow, nice catch guys... I didn't even notice that in the original post... (yeah I know here comes an old joke from Ryan lol).
Anyway, the constant 12V can go to anything that is constant 12 volts... including the battery, but if you wire it that way get an additional inline fuse for it.

cherrington17 · 11-21-2008, 07:46 PM

you can splice it into the side fusebox, if you need to. just get some wire connectors and a fusetap, for godsake. don't just cram the wire in under the fuse!

11-21-2008, 08:24 PM

why would you cut your stock harness.. Yes you can tap a fuse but buy a fuse tap and some wire connectors

lonnie · 11-21-2008, 09:00 PM

I would have tested the radio before I put it in...ie hook the ign and constant +12 of the radio to the + side of the battery and the black to chasis ground and see if it turns on if so then its the wiring that is the issue and not the radio....process of elimination!

Ryan from Ohio · 11-21-2008, 10:19 PM

Quote:

Originally Posted by ryanthefizz

already cut my stock harness out, any other ideas? can I run it to the fuse panel on passenger side or anything like that?

**shakes head**