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Old 04-20-2018, 09:44 AM   #1
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Parasitic battery drain - SOLVED!

Had my car in the shop having a health check (cam deviations, suspension, etc) and gearbox oil change.
I had them spend some time on looking into the battery drain problem I have been chasing for a year or so.
Turns out it is the little red LED on the radio/dvd player! The reading shows it pulsing as it flashes, which is normal, but it is using way too much power to do so! Which was running down my battery after 5 days. Apparently they have had a few with the same problem - seems age related.
As I rarely use the radio I may just leave it disconnected or look for a new one.
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Old 04-20-2018, 12:36 PM   #2
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Originally Posted by njbray View Post
As I rarely use the radio I may just leave it disconnected or look for a new one.
I hear ya.
Flat6 FM 986.6 is the shizzle.

But seriously, good to hear you got the battery issue sorted.
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Old 04-20-2018, 07:41 PM   #3
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If you have a CDR-220 look in the manual there is an option to turn off this flashing led.
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Old 04-21-2018, 10:07 AM   #4
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Here is the instructions to turn off the LED:



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Old 04-21-2018, 11:32 AM   #5
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An LED caused the battery to drain in 5 days? How much power was it using?
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Old 04-21-2018, 02:05 PM   #6
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I've been meaning to start a thread with my observations of interior lighting and how long different items stay on (will do so soon or soon-ish). Something you might want to look at is how long the orientation lights (LEDs in doors and by mirror) stay on....you just might be astounded.
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Old 04-21-2018, 06:15 PM   #7
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Yes - that is a problem. But how can you shorten the delay before they turn off?
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Old 04-23-2018, 08:57 AM   #8
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Here is the instructions to turn off the LED:



I have been trying this and it will not work for me. pressing the arrow button does not do anything. Maybe this is part of the problem with the unit.
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Old 05-12-2018, 10:40 PM   #9
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Thanks for this njbray and pomero!
My car has, for years now, had the battery run down after a couple of weeks of sitting and it didn't matter how new the batteryt was. I always made a point to go start it or put it on the charger if I wasn't able to actually drive it for a while.
After changing my radio settings to turn off the LED then going away on a trip for three weeks, my car started right up when I returned! This would not have happened before.
Many, many thanks running this down (as it were) and letting us know what you found about the LED power usage. It is much appreciated!
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Old 05-13-2018, 08:12 AM   #10
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This is a great fix. Kudos to those who have figured it out. Even better, they shared the solution. But what about the explanation of the problem?
The math for calculating the power consumption of one small LED warning light x hours active does not explain the depletion of the battery in these cases ?
When this LED is 'ON' , there must be another component(s) also consuming power ? It could be something as obscure as a leak of current to ground. So that mystery may be a challenge for someone !
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Old 05-27-2018, 09:52 AM   #11
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Don’t know if I have this problem or not because the car is always on the battery tender but what the heck, I turned off the flashing led anyway. What’s not apparent in the CDR-23 directions is that you use the right radio knob push button function to cycle through the sub-menu options once you are in the ‘user’ menu.
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