Parasitic drain
Thread Starter
Melting Slicks
Joined: Sep 2006
Posts: 2,721
Likes: 104
From: Florida
Parasitic drain
Hey guys,
I gotta a weird one here. Not to long ago I installed a system on my car. I was getting a ground-loop noise made a post on here but none of the suggestions fixed that (ran a better ground from HU to seat bolt where amp is grounded). Thats one issue i'll have to fix.
Now i found out the constant 12v (yellow) on the wiring harness that my HU is connected to, is draining my battery. I put a meter in series with the battery and i was getting over 1amp draw while in sleep mode. Cut the 12v constant and it drops down to .02mA.
Should i run another C-12v from another location?? Where is another C-12v circuit?? Right now i have it wired it up on a SW-12v i just don't have any memory. I can live with that for awhile.
What does it mean that the C-12v is draining my battery?
I gotta a weird one here. Not to long ago I installed a system on my car. I was getting a ground-loop noise made a post on here but none of the suggestions fixed that (ran a better ground from HU to seat bolt where amp is grounded). Thats one issue i'll have to fix.
Now i found out the constant 12v (yellow) on the wiring harness that my HU is connected to, is draining my battery. I put a meter in series with the battery and i was getting over 1amp draw while in sleep mode. Cut the 12v constant and it drops down to .02mA.
Should i run another C-12v from another location?? Where is another C-12v circuit?? Right now i have it wired it up on a SW-12v i just don't have any memory. I can live with that for awhile.
What does it mean that the C-12v is draining my battery?
Last edited by chris308; Apr 23, 2007 at 08:06 PM.
Melting Slicks
Joined: Aug 2006
Posts: 2,866
Likes: 45
From: Tampa Bay, Go BUCS!!!Go Rays!!!Go Lightning!!!
St. Jude Donor '12-'13-'14
I would think the drain is more a factor of the head than it is the source. Changing to a different C12v probably won't help. I'd check into the head and see if there is something you have programmed that is "staying on" and causing the drain.
Thread Starter
Melting Slicks
Joined: Sep 2006
Posts: 2,721
Likes: 104
From: Florida
thanks for the reply.
theres nothing really on the HU to program. I have a satellite cable connected to it. rca's and the radio antenna cable. THe only wires i was using off the OEM harness was the red (sw12v) yellow (c12v) and the blu for the power antenna.
It only draws an amp in sleep mode when i have it connected to the yellow. Maybe theres a short in the HU itself, i don't know.
theres nothing really on the HU to program. I have a satellite cable connected to it. rca's and the radio antenna cable. THe only wires i was using off the OEM harness was the red (sw12v) yellow (c12v) and the blu for the power antenna.
It only draws an amp in sleep mode when i have it connected to the yellow. Maybe theres a short in the HU itself, i don't know.
good news!
