Another Battery Draining Thread...But with a twist
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SOLVED: Another Battery Draining Thread...But with a twist
EDIT: Mystery solved, there was a Boomerang unit installed by one of the previous owners that was draining the battery as the back up battery that it had come with is no longer any good.
Dum Dum Dum....
So this is yet another battery dead/draining thread - only I come here armed with most of the common things answered, checked, and tested.
So my battery has died on me now twice. Both times it basically happened over night. I had the battery tested at my local auto parts store and they said that it has plenty of life left in it still. I've tested the alternator, and it does charge the battery OK and also (not many say to check this, but it is totally possible) it is not draining it.
With the battery and alternator out of the way as being "bad" I went on to look deeper for the problem. I performed a parasitic draw test and found that after my car had been sitting for 20-30 minutes (so all electronic systems are "asleep") my car has a draw of 0.27AMPs. That is about 0.22AMPs too much. I started to pull fuses one at a time to see what I could find...
This is where I get stuck, and guys I need your help here. In the fuse box that is right beside the battery, the fuse on the very left bottom (30AMP) is where the draw is coming from. Once I pulled that fuse, the draw fell to a 0.01AMPs, which is perfect. In the owners manual I believe it just says that it is "Audio" which to me doesn't explain a thing. Anyone have an idea or a wiring diagram for this?
Note, both of those are not my pictures, just one I found in the interwebs.
EDIT: Found a picture of the instruction manual, look at fuse #7.
Dum Dum Dum....
So this is yet another battery dead/draining thread - only I come here armed with most of the common things answered, checked, and tested.
So my battery has died on me now twice. Both times it basically happened over night. I had the battery tested at my local auto parts store and they said that it has plenty of life left in it still. I've tested the alternator, and it does charge the battery OK and also (not many say to check this, but it is totally possible) it is not draining it.
With the battery and alternator out of the way as being "bad" I went on to look deeper for the problem. I performed a parasitic draw test and found that after my car had been sitting for 20-30 minutes (so all electronic systems are "asleep") my car has a draw of 0.27AMPs. That is about 0.22AMPs too much. I started to pull fuses one at a time to see what I could find...
This is where I get stuck, and guys I need your help here. In the fuse box that is right beside the battery, the fuse on the very left bottom (30AMP) is where the draw is coming from. Once I pulled that fuse, the draw fell to a 0.01AMPs, which is perfect. In the owners manual I believe it just says that it is "Audio" which to me doesn't explain a thing. Anyone have an idea or a wiring diagram for this?
Note, both of those are not my pictures, just one I found in the interwebs.
EDIT: Found a picture of the instruction manual, look at fuse #7.
Last edited by MoeSzyslak; 03-09-14 at 03:08 PM.
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To add to this... When I hooked the battery back up directly, and started the car to move it, everything still worked on my (factory) head unit including the HVAC, however there was no sound. Kind of leaning towards this being an amplifier?
Last edited by MoeSzyslak; 03-09-14 at 03:09 PM.
#5
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Does your car have Navigation and Bluetooth? I had a similar situation with my BMW where the Telecommunication Unit (Bluetooth) kept waking up every 30 minutes to search for phone/bluetooth device. I replaced the board and the problem went away. I am not sure how hou would check this on the Lexus. Also Try to LOCK your car and see if it will completely go into "Sleep Mode"?
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Navi was the only thing that did not come on this car, bluetooth also was not part of it. It has everything else though.
Good idea on doing this test with a locked car as it was unlocked when I did this, though keys were not in proximity so I wasn't setting off the smart system. Literally everything was off and "asleep" except for this "Audio" fuse when I pulled it out.
Good idea on doing this test with a locked car as it was unlocked when I did this, though keys were not in proximity so I wasn't setting off the smart system. Literally everything was off and "asleep" except for this "Audio" fuse when I pulled it out.
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What in the audio system still works when you pull the fuse? From your statement above I assume that the fuse you are pulling is the amplifier. I'd search out the location of the amplifier and backprobe the connections there to see what the draw is at the amp itself. Might be that the amp isn't sensing the car is turning off and remaining on. It may feel warm to the touch after sitting overnight with it being on. Try unplugging the amp and see if the battery stays charged overnight (Does it do this every day, or intermittently?) I spent 3 years chasing a similar issue in my wife's 300M and finally got it narrowed down to an AUX adapter that was in her car for iPod connection. Once I removed that it has been golden. Only drawback is now she only has the 6-disc changer to use and missed the iPod, but the M will only be with us until I find the IS to replace it
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What in the audio system still works when you pull the fuse? From your statement above I assume that the fuse you are pulling is the amplifier. I'd search out the location of the amplifier and backprobe the connections there to see what the draw is at the amp itself. Might be that the amp isn't sensing the car is turning off and remaining on. It may feel warm to the touch after sitting overnight with it being on. Try unplugging the amp and see if the battery stays charged overnight (Does it do this every day, or intermittently?) I spent 3 years chasing a similar issue in my wife's 300M and finally got it narrowed down to an AUX adapter that was in her car for iPod connection. Once I removed that it has been golden. Only drawback is now she only has the 6-disc changer to use and missed the iPod, but the M will only be with us until I find the IS to replace it
Will likely be a week until I update this thread as I am gone for a week starting tomorrow. Until then, this will remain a mystery.
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I had a problem of my battery dying within 1 or 2 years. Last time it died and got a replacement, I ask the Lexus tech to check the current draw and he said it was fine. I got the car back and check and it was around 0.3A when the car is off if I remember correctly. I had let the car sit for a day without driving it, and it still starts up fine.
If you do the math for your car, even if it's doing the current current draw, it should still start the car:
0.22A * 20hours = 4.4 Ah. I'm not sure what the capacity of your battery is, but the 0.22A current draw is not what's causing your car to not start in the morning ...
If you do the math for your car, even if it's doing the current current draw, it should still start the car:
0.22A * 20hours = 4.4 Ah. I'm not sure what the capacity of your battery is, but the 0.22A current draw is not what's causing your car to not start in the morning ...
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Just got back from vacation today so going to do some more investigative work on this today.
I had a problem of my battery dying within 1 or 2 years. Last time it died and got a replacement, I ask the Lexus tech to check the current draw and he said it was fine. I got the car back and check and it was around 0.3A when the car is off if I remember correctly. I had let the car sit for a day without driving it, and it still starts up fine.
If you do the math for your car, even if it's doing the current current draw, it should still start the car:
0.22A * 20hours = 4.4 Ah. I'm not sure what the capacity of your battery is, but the 0.22A current draw is not what's causing your car to not start in the morning ...
If you do the math for your car, even if it's doing the current current draw, it should still start the car:
0.22A * 20hours = 4.4 Ah. I'm not sure what the capacity of your battery is, but the 0.22A current draw is not what's causing your car to not start in the morning ...
I do not believe that my short distance driving is what is killing my battery however, since I've owned numerous other cars driving the same route and never had a problem until I bought this car.
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Looks like I found the culprit... Seems that someone had "wired" in the past an aftermarket something to the audio system in the trunk directly off the amp. This is not OEM, nor does this look like it was installed and then un-installed right.
Took a picture of the Amp and then close ups of the wiring that was butchered by someone in the past.
Took a picture of the Amp and then close ups of the wiring that was butchered by someone in the past.
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Oh my... I wonder if he had installed an aftermarket powered sub in there such as an Infinity Basslink? I have one in my wife's 300M but when I installed it I made sure that I am going to be able to fix it before selling the car. I used some wire taps so that I didn't have to cut the wires to splice in, so when I remove it I just need to repair the insulation on the wire. Can't clearly tell from the pictures, but to me it looks like they've been cut/stripped back and twisted together.
I wonder if the switch you found up front turned the aftermarket amp off/on?
If you're willing to try and fix it yourself, search YouTube on how to correctly solder wire splices. If you have a HarborFreight nearby, you can pick up a soldering iron pretty cheap along with some shrink-tubing. Slide the tubing over the wire before splicing it together, solder the connection, slide the shrink tube down over the splice and heat the tube and it will seal/protect the bare wire splice.
If you're not comfortable doing this yourself just about and car audio shop (Not like Best Buy, but an independent type) should be able to handle the job. I've had electrical problems and found stuff like you in the past. Felt confident that I had found it and fixed it only to have to go back and try to find something else. Hopefully this is it. Make sure the wires match up. I see a few solid red ones that he hopefully connected to the correct sold red on the connector side..
Best of luck!
I wonder if the switch you found up front turned the aftermarket amp off/on?
If you're willing to try and fix it yourself, search YouTube on how to correctly solder wire splices. If you have a HarborFreight nearby, you can pick up a soldering iron pretty cheap along with some shrink-tubing. Slide the tubing over the wire before splicing it together, solder the connection, slide the shrink tube down over the splice and heat the tube and it will seal/protect the bare wire splice.
If you're not comfortable doing this yourself just about and car audio shop (Not like Best Buy, but an independent type) should be able to handle the job. I've had electrical problems and found stuff like you in the past. Felt confident that I had found it and fixed it only to have to go back and try to find something else. Hopefully this is it. Make sure the wires match up. I see a few solid red ones that he hopefully connected to the correct sold red on the connector side..
Best of luck!
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Oh my... I wonder if he had installed an aftermarket powered sub in there such as an Infinity Basslink? I have one in my wife's 300M but when I installed it I made sure that I am going to be able to fix it before selling the car. I used some wire taps so that I didn't have to cut the wires to splice in, so when I remove it I just need to repair the insulation on the wire. Can't clearly tell from the pictures, but to me it looks like they've been cut/stripped back and twisted together.
I wonder if the switch you found up front turned the aftermarket amp off/on?
If you're willing to try and fix it yourself, search YouTube on how to correctly solder wire splices. If you have a HarborFreight nearby, you can pick up a soldering iron pretty cheap along with some shrink-tubing. Slide the tubing over the wire before splicing it together, solder the connection, slide the shrink tube down over the splice and heat the tube and it will seal/protect the bare wire splice.
If you're not comfortable doing this yourself just about and car audio shop (Not like Best Buy, but an independent type) should be able to handle the job. I've had electrical problems and found stuff like you in the past. Felt confident that I had found it and fixed it only to have to go back and try to find something else. Hopefully this is it. Make sure the wires match up. I see a few solid red ones that he hopefully connected to the correct sold red on the connector side..
Best of luck!
I wonder if the switch you found up front turned the aftermarket amp off/on?
If you're willing to try and fix it yourself, search YouTube on how to correctly solder wire splices. If you have a HarborFreight nearby, you can pick up a soldering iron pretty cheap along with some shrink-tubing. Slide the tubing over the wire before splicing it together, solder the connection, slide the shrink tube down over the splice and heat the tube and it will seal/protect the bare wire splice.
If you're not comfortable doing this yourself just about and car audio shop (Not like Best Buy, but an independent type) should be able to handle the job. I've had electrical problems and found stuff like you in the past. Felt confident that I had found it and fixed it only to have to go back and try to find something else. Hopefully this is it. Make sure the wires match up. I see a few solid red ones that he hopefully connected to the correct sold red on the connector side..
Best of luck!
Then I went on to tear apart the wiring that had been done on the rear amp and found that the wires were not spliced, luckily. Part of the insulation was partly stripped on two of the wires which appeared to be sound. I cleaned it all up and wrapped it back up in tape properly this time. To be honest, the mess wasn't as bad as it appeared as the only butchering really was in the way the connections were taped up.
After cleaning some of it off, I noticed a rather non factory looking connection that was leading into the area between the quarter panel and trunk bracing. The wiring looked clean but not quite OEM so I decided to stick my head on there to see where that wire went as this was on the passenger side, and the gas cap is on the driver. Found a black box glued to the quarter panel, which doesn't seem OEM to me at all... Realizing that the glue was barely holding this thing I pulled on the wire and it came out; actually, two black boxes came out. Looking it all over, I found an antenna like wire sticking out of one of them which made me nearly ***** a brick thinking what sort of tracker/James Bond crap was installed onto my car.
Unwrapping the tape I found one to be a larger capacity batter, like a back up unit. Not knowing what this was I went on to unwrap the second box to find that it was a Boomerang unit. For those of you not knowing that a Boomerang is, it is a GPS tracker that tracks the location of your car in a case where it is stolen.
Having a multimeter hooked up to the battery, I am seeing a non stop draw of 0.160AMP. I went on to cut the battery from the circut that was on the Boomerang and saw the draw go down to 0.070AMP which is considerate but still high considering the magic number I am looking for >0.050AMP. Once I cut the Boomerang off the circuit, the draw went down to 0.010 AMP. Cleaned up all the connections and hooked the amplified back up - no change in draw. Super! I found the cause of the problem.
In almost every single advice column/video I read about looking for parasitic draws it said to look out for aftermarket stereo set ups and aftermarket alarms.
In terms of my level of comfort on this, I had no problem getting to this. I have a pretty strong background working with cars (as a hobby). My other car is a 1968 Firebird; and I've also in the past owned numerous Subaru's; one of which I've actually built pretty much from scratch.