Ignition/ACC low voltage?

JoeWood

CarAudio.com Newbie
3
0
NY
I'm trying to put in a new head unit on a 2007 Chevy Silverado 1500 Classic, and for some reason, I'm only getting about 4.5v when car is started. The fuse seems fine, not sure where to look next.
Anybody have something like this before?
 
OP
JoeWood

JoeWood

CarAudio.com Newbie
3
0
NY
Is this on both power wires? The constant and the accessory.
No, the Constant is 12v. the accessory is low, so low that it doesn't actually trigger the head unit.
If I bridge the constant to the accessory, everything works. Just the Accessory isn't working correctly.
I thought I had got a reading of 4 volts, but now every time I try I'm only getting like 0.5v.
 

audiobaun

CarAudio.com Veteran
5,000+ posts
10+ year member
14,783
1,744
USA
Did you get the correct wiring harness for the HU? If not.. Its possible the pin connection isnt making full contact in that slot
 
OP
JoeWood

JoeWood

CarAudio.com Newbie
3
0
NY
Did you get the correct wiring harness for the HU? If not.. Its possible the pin connection isnt making full contact in that slot
I did yeah. The OEM Harness was frustrating because the pinouts for the aftermarkets had the wrong layout. I have it correct. I'm measuring low voltage out of the acc wire probing at the OEM harness. Same issue with the OEM radio.
 
Activity
No one is currently typing a reply...

About this thread

Thread starter
JoeWood
Start date
Participants
Who Replied
Replies
5
Views
708
Last reply date
Last reply from
JoeWood

Latest topics

IMG_2181.gif

Buck

    Sep 24, 2023
  • 0
  • 0
IMG_2214.gif

Buck

    Sep 24, 2023
  • 0
  • 0
IMG_2213.gif

Buck

    Sep 24, 2023
  • 0
  • 0
IMG_2212.png

Buck

    Sep 24, 2023
  • 0
  • 0
IMG_2211.png

Buck

    Sep 24, 2023
  • 0
  • 0
targsz.jpeg

Sanz

    Sep 24, 2023
  • 0
  • 0
targa.jpeg

Sanz

    Sep 24, 2023
  • 0
  • 0
20230916_135300.jpg

Koverbover

    Sep 22, 2023
  • 0
  • 0
20230916_203824.jpg

Koverbover

    Sep 22, 2023
  • 0
  • 0
IMG_20230916_233950_01.jpg

Koverbover

    Sep 22, 2023
  • 0
  • 0
really.jpg

Popwarhomie

    Sep 22, 2023
  • 0
  • 0
port rework.jpg

Popwarhomie

    Sep 21, 2023
  • 0
  • 0
20230913_112819.jpg

TexanSound

    Sep 21, 2023
  • 0
  • 0
IMG_3858.jpeg

dysfunctional canuck

    Sep 17, 2023
  • 0
  • 0
rear.jpg

Popwarhomie

    Sep 17, 2023
  • 0
  • 0
Top