Here's a wire diagram. I would disconnect the BCM to see if the current draw drops for your next test.
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Need help diagnosing a parasitic drain issue
Hi, all. Not too long ago, I had my stock nav unit removed in favor of a Kenwood DMX905S Android Auto head unit. I only drive this car on the weekends, and after about a week of leaving it parked I discovered that the battery needed a jump. The alternator is perfectly fine. This made me suspect a parasitic drain. Today I had time to do the test, and I'm seeing 1000-1100mA of drain with the car off (10x what it should be). I pulled fuses one by one:
1) Pulling the AUDIO fuse drops me to ~500mA.
2) Pulling the HAZARD fuse (BCM + Flasher Sound Relay) is another ~500mA drop.
3) With both fuses pulled, I'm at a very health <75mA of drain.
While it's obvious the radio is not suspending or sleeping correctly, I am concerned about the Hazard fuse. Where do I even begin to figure out how or why this fuse is pulling down half an amp at rest?
Could these two be related?
1) Pulling the AUDIO fuse drops me to ~500mA.
2) Pulling the HAZARD fuse (BCM + Flasher Sound Relay) is another ~500mA drop.
3) With both fuses pulled, I'm at a very health <75mA of drain.
While it's obvious the radio is not suspending or sleeping correctly, I am concerned about the Hazard fuse. Where do I even begin to figure out how or why this fuse is pulling down half an amp at rest?
Could these two be related?
1 - 13 of 13 Posts
Thanks for the help so far, y'all.
It's my understanding that the BCM is in the center console under the radio stack. Is it possible that the aftermarket headunit install, and all the rewiring, tampered with the BCM somehow? Nicked a wire? Crossed a wire?
I know nothing about car electricals, so I really need someone to spell it out for me.
It's my understanding that the BCM is in the center console under the radio stack. Is it possible that the aftermarket headunit install, and all the rewiring, tampered with the BCM somehow? Nicked a wire? Crossed a wire?
I know nothing about car electricals, so I really need someone to spell it out for me.
Thanks for the help so far, y'all.
It's my understanding that the BCM is in the center console under the radio stack. Is it possible that the aftermarket headunit install, and all the rewiring, tampered with the BCM somehow? Nicked a wire? Crossed a wire?
I know nothing about car electricals, so I really need someone to spell it out for me.
Absolutely. Suspect #1 .
I could be depending on how the stereo was wired, or how the stereo functions.Thanks for the help so far, y'all.
It's my understanding that the BCM is in the center console under the radio stack. Is it possible that the aftermarket headunit install, and all the rewiring, tampered with the BCM somehow? Nicked a wire? Crossed a wire?
I know nothing about car electricals, so I really need someone to spell it out for me.
Easiest way to test that remove the fuse for the stereo and test.
To know for sure if it's the stereo is to disconnect the stereo and test again.
Thinking along that line, could be some other audio equipment like and amp.
I would reseat the 2 connectors on the BCM. Easy to do.
I’m curious if you ever found/ fixed the issue, was it the amp or was it the hazard circuit?Hi, all. Not too long ago, I had my stock nav unit removed in favor of a Kenwood DMX905S Android Auto head unit. I only drive this car on the weekends, and after about a week of leaving it parked I discovered that the battery needed a jump. The alternator is perfectly fine. This made me suspect a parasitic drain. Today I had time to do the test, and I'm seeing 1000-1100mA of drain with the car off (10x what it should be). I pulled fuses one by one:
1) Pulling the AUDIO fuse drops me to ~500mA.
2) Pulling the HAZARD fuse (BCM + Flasher Sound Relay) is another ~500mA drop.
3) With both fuses pulled, I'm at a very health <75mA of drain.
While it's obvious the radio is not suspending or sleeping correctly, I am concerned about the Hazard fuse. Where do I even begin to figure out how or why this fuse is pulling down half an amp at rest?
Could these two be related?
It was the amp.
Interesting, I wonder why the hazard circuit was pulling down. A mechanic told me I had that same circuit pulling amps.
On BK2, hazard fuse also controls BCM. It's very easy to keep BCM awake with crank audio equipment or canbus issues. The OE amp just wasn't playing nice with the new head unit. Inexpensive Rockford Fosgate replaced the OE amp and all was well.
Hey there, stumbled upon your thread and facing a similar issue. I suspect that there is a power drain in my 2013 Track. When this was happening to you, were you getting a chime from the dash every minute or so?Hi, all. Not too long ago, I had my stock nav unit removed in favor of a Kenwood DMX905S Android Auto head unit. I only drive this car on the weekends, and after about a week of leaving it parked I discovered that the battery needed a jump. The alternator is perfectly fine. This made me suspect a parasitic drain. Today I had time to do the test, and I'm seeing 1000-1100mA of drain with the car off (10x what it should be). I pulled fuses one by one:
1) Pulling the AUDIO fuse drops me to ~500mA.
2) Pulling the HAZARD fuse (BCM + Flasher Sound Relay) is another ~500mA drop.
3) With both fuses pulled, I'm at a very health <75mA of drain.
While it's obvious the radio is not suspending or sleeping correctly, I am concerned about the Hazard fuse. Where do I even begin to figure out how or why this fuse is pulling down half an amp at rest?
Could these two be related?
No sir. Just abnormally high idle drain.Hey there, stumbled upon your thread and facing a similar issue. I suspect that there is a power drain in my 2013 Track. When this was happening to you, were you getting a chime from the dash every minute or so?
1 - 13 of 13 Posts
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