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Radio/Amp fuse wiring schematic

Tiny
BROKENTOE
  • MEMBER
  • 2005 CHEVROLET AVALANCHE
  • 5.3L
  • V8
  • 4WD
  • AUTOMATIC
  • 340,000 MILES
Hi, I have the vehicle listed above that has a parasitic draw. When I pull my stereo/amp fuse the draw goes away. I am wanting to know what all is involved in the wiring in this system. I had changed my amp already and it didn't make a difference.
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Thursday, November 5th, 2020 AT 2:52 PM

14 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,179 POSTS
Hi,

At that point, I would leave the fuse in and then disconnect the radio to see if that stops the draw.

I will be happy to provide wiring schematics to help, but I need to narrow things down. If you look at the attached pic, you'll see all the optional sound systems for this vehicle. Can you identify which yours is?

Let me know.

Joe
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Thursday, November 5th, 2020 AT 3:29 PM
Tiny
BROKENTOE
  • MEMBER
  • 33 POSTS
It is not the radio fuse but the radio/amp fuse.
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Thursday, November 5th, 2020 AT 4:10 PM
Tiny
BROKENTOE
  • MEMBER
  • 33 POSTS
Down in the bottom right hand corner one up from the bottom of the fuse box under hood.
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Thursday, November 5th, 2020 AT 4:13 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,179 POSTS
Hi,

I need to know which schematics to look through to help identify where the problem could be coming from.

Let me know.
Joe
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Thursday, November 5th, 2020 AT 4:32 PM
Tiny
BROKENTOE
  • MEMBER
  • 33 POSTS
I am not sure but I think it is the premium sound with rear entertainment. I took out the radio and it didn't make a difference. The radio works and I get sound from it. Only I am getting this draw. When I pull the radio/amp fuse 30 amp. The draw goes away.
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Thursday, November 5th, 2020 AT 4:43 PM
Tiny
BROKENTOE
  • MEMBER
  • 33 POSTS
There is a video system circuit as well. It has a DVD player.
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Thursday, November 5th, 2020 AT 4:56 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,179 POSTS
Hi,

I attached the wiring schematic for this system. I had to overlap them to make it readable.

The first thing I would do is disconnect the rear seat audio controller to see if that stops the draw. The radio fuse sends direct power to the radio and that controller. If the radio is off, it shouldn't be drawing, so that's why I suggested the controller. See what happens.

Joe
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Thursday, November 5th, 2020 AT 4:58 PM
Tiny
BROKENTOE
  • MEMBER
  • 33 POSTS
Well, I disconnected the rear audio controller but no change.
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Thursday, November 5th, 2020 AT 8:02 PM
Tiny
BROKENTOE
  • MEMBER
  • 33 POSTS
While I had the rear cover off I thought I would disconnect the amp on one side. That made the difference. Only now where to go from there? It was the left side I disconnected.
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Thursday, November 5th, 2020 AT 9:04 PM
Tiny
BROKENTOE
  • MEMBER
  • 33 POSTS
While I had the cover off I disconnected the amp on the left side as you are facing it. That made the difference.
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Thursday, November 5th, 2020 AT 9:16 PM
Tiny
BROKENTOE
  • MEMBER
  • 33 POSTS
Would it be possible to get the pin layout for the harness I described? I have 20 pins being used on this harness.
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Thursday, November 5th, 2020 AT 10:00 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,179 POSTS
Take a look at the attached pics and let me know if they help. It doesn't show a connector, but does show what each wire is for.

Let me know.
Joe
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Friday, November 6th, 2020 AT 2:05 PM
Tiny
BROKENTOE
  • MEMBER
  • 33 POSTS
You are focusing on the radio. I am focusing on the amplifier which has a separate power supply.
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Thursday, November 12th, 2020 AT 11:18 AM
Tiny
DANNY L
  • MECHANIC
  • 5,648 POSTS
Hello, I'm Danny.

Here is the 2nd page of the radio-amplifier wiring diagram you requested. This is the amplifier wiring page for your truck. I've cut it into 3 pieces so you can view larger. Hope this helps and thanks again for using 2CarPros.
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Thursday, November 12th, 2020 AT 5:36 PM

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