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Old 09-03-2011, 06:12 PM   #1
minnElement
EOC Rank: Hydrogen
2003 2WD EX AT
 
Join Date: Dec 2009
Location: Minnesota
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Isolating battery drain issue

The battery on my 2003 Element has been inexplicably draining if left sitting for more than overnight to the point where it almost can't turn over the engine. I've traced this to the "Back Up" circuit through the fuse box, but I have no idea what that is and what exactly could be the issue.

Ideas?
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Old 09-03-2011, 08:01 PM   #2
Rob Dobbs
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2007 SC 2WD 5AT
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Interesting as Ive just discovered this on my 07. At first I suspected a ground or other issue from the custom stereo install but all that is not the issue.
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Old 09-04-2011, 08:06 AM   #3
minnElement
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2003 2WD EX AT
 
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I have a stock radio. The only drain should really be come from the little flashing anti-theft light when the car is off, but certainly it shouldn't kill the battery in that short period of time.

I've had the new battery tested and it's good. Hmmmm.
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Old 09-04-2011, 06:31 PM   #4
Rob Dobbs
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Im hoping to get mine one the rack this week to check all grounds and leads. I did notice corrosion on the negative terminal so I wonder if there may be some on the alternator leads.
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Old 09-06-2011, 09:58 AM   #5
ramblerdan
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2004 4WD EXS MT
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> I've traced this to the "Back Up" circuit

Do you have an aftermarket trailer hitch?
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Old 09-06-2011, 07:31 PM   #6
ApriliaGuy
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Quote:
Originally Posted by ramblerdan View Post
> I've traced this to the "Back Up" circuit

Do you have an aftermarket trailer hitch?
or any trailer wiring harness or patched in connection for trailer/aux lights?
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Old 10-25-2011, 06:43 PM   #7
Rob Dobbs
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Turns out mine was a bad Optima red top. No hassle on the return though.
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Old 03-09-2012, 08:21 AM   #8
Sailor Tom
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2003 4WD EX AT
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This thread describes my problem with my 2003. I am having the same problem, brand new battery drains if the cars sits any length of time (brand new alternator also). I do have a trailor light connection that I plugged into the wiring harness 4 years ago. It was not a Honda part, but came from a reputable supplier. Would appreciate any suggestions in tracking down my problem.
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Old 03-09-2012, 01:16 PM   #9
ramblerdan
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One method: Set the dome light to the off position. Make sure you have your radio code ready, and be prepared to reset your driver's window. Disconnect the negative terminal from the battery and put a VOM, set to milliAmperes (mA), between the battery post and terminal. Pull the fuse for the radio (to take the tiny draw for the clock and radio code memory out of the mix), noting where it has to go back later. Then pull the other fuses one at a time while a helper watches the meter. If pulling a fuse causes the reading to drop, you have a good place to start in finding the parasitic draw. Remember that you have two fuse boxes, one under the dash and another under the hood.
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Old 03-09-2012, 01:42 PM   #10
Sailor Tom
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2003 4WD EX AT
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Thanks for the tip. I found a posting on another site that recommended changing the a/c compressor clutch relay. I replaced that and the condenser fan relay (7.00 each at dealer). I will do the voltmeter check also. Will report back.
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