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Sonic Electronix

Did I Just Fry my Headunit??!!


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Posted

Headunit: Pioneer AVH-p4000DVD

One of my amps was acting stupid, so I started unplugging RCA's to see which channel was working while the HU was still on.

Shortly after, I turned the car off, turned it back on the the HU was dead.

First I checked the fuse on the back of the stereo...good.

Checked the radio fuse in the fuse box of the car...good.

Took a DMM and checked for voltage at the wire harness that plugs into the HU...12.4v.

Now...I don't know anything else that could be wrong, other than a blow head unit. Given that this is completely my fault, as I know I've read somewhere that you should not disconnect and connect wires while the HU has power, do I have any options? Am I missing something to trouble shoot the issue?

Learning Everyday.

Pioneer AVH-P4000DVD

Alpine SPS-610C

BXI-2008D

(2) SWR-1242D / Ported

Posted

^^^^^^^^^^ this x2

JEEP BUILD PROJECT ANTIBLING.2000 jeep Cherokee.HEADUNITAlpine Cda-9886SUBSTAGE1 acendent 18" audio mayhem motor with a TI basket and tantric parts1 prototype DAT hellfire 1000.1HIGHSStockELECTRICALdb link 0 gaugeKnuconceptz Kolossus 4 gauge1 xs power d3400 under hoodBig 3 upgradeold fourwheeler build

The only way to delete your SMD account is for you crawl to steve meades door step on your knees and pleade for his forgiveness and acceptance to be released...He will either grant your wishes.....or choke you with a large piece of 0 gauge and electrocute you by hooking up a solid gold DC 12k at 0.000001 ohm and 10000 volts to your eye sockets and blow your head apart

You guys act like you have never clogged a toilet and ran around the bathroom frantically hoping it don't overflow.

Posted

check and make sure the harness is all the way in like stated above ^^

Get a DMM and check the power wire, ignition wire, and the ground

one of those may be bad and it could also be bad behind the factory harness

ive had this happen on my burban and a friend of mines car and had to re run new wires

2014 Chevy Silverado Crewcab

1994 Chevy Full Size blazer

Posted

Did the harness come loose when you pulled the rcs's?

I never pulled the RCA's. All I did was disconnect them in the back next to the amp, but no, the harness didn't come loose. I haven't checked the ignition wire though.

Should I assume that merely moving RCA's around on the amp shouldn't cause the radio to no longer power on?

Learning Everyday.

Pioneer AVH-P4000DVD

Alpine SPS-610C

BXI-2008D

(2) SWR-1242D / Ported

Posted

Wow...so u never unhooked anything from thee radio...just the rca's at the amp? I'm stumped...pull your radio nd check the voltage and grounds @ the radio...if one isn't working, follow it till you find out where it shorted at.

mivtCK.png

Posted

Wow...so u never unhooked anything from thee radio...just the rca's at the amp? I'm stumped...pull your radio nd check the voltage and grounds @ the radio...if one isn't working, follow it till you find out where it shorted at.

I want to thank everyone that replied.

I still don't have it working correctly yet, BUT, I ran the accessory wire from the harness to my switch to turn the amp on, and the head unit powered up. Now I know it's a wiring issue somewhere, I just have to find it. I'm just happy it's coming on. Thanks again to everyone.

Learning Everyday.

Pioneer AVH-P4000DVD

Alpine SPS-610C

BXI-2008D

(2) SWR-1242D / Ported

Posted

Ya, I was going to say, unplugging RCA should never short anything like what you are explaining. Glad you figured something out because if you didn't I don't think anyone could have helped you figure out was wrong.

On 11/20/2012 at 8:54 PM, AMI CUSTOMS said:

Turned mine up today at a light, guy next to me his steering wheel started moving and he looked over at me like I was a magician lol.

On 5/9/2012 at 8:45 PM, skittlesRgood said:

fuck the plating. look at what the main metal used is. you could buy unicorn blood plated terminals but if its just covering up dog shit, whats the point

On 4/10/2013 at 12:26 PM, mrd6 said:

I'll admit, half way through sanding that fiberglass in the rain and cold while I was all itchy I was definitely starting to question why i was doing this haha

  • Soon To Be
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  • D4800 Under the Hood
  • (6) XP3000's in Rear
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  • TORK2 kit from Tony @ CE Auto Supply
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Posted

Ya, I was going to say, unplugging RCA should never short anything like what you are explaining. Glad you figured something out because if you didn't I don't think anyone could have helped you figure out was wrong.

Now that I have that right, I guess I can start another thread about my dang on amp.

Learning Everyday.

Pioneer AVH-P4000DVD

Alpine SPS-610C

BXI-2008D

(2) SWR-1242D / Ported

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