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Battery going flat


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#1 johncbx

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Posted 10 September 2018 - 11:13 AM

Hi my 2003 2.0 ltr petrol engine tourer Ex  battery keeps going flat and not enough charge to start it if left unused over weekend.Had new battery 6 months ago, i have had the battery and alternator checked at local garage and all ok .

I dont have the hft or bluetooth fitted as standard, but have x-carlink bluetooth unit fitted which works fine.Has anyone any ideas as where to look as its a pain to keep charging the battery? regards john.



#2 Mr Honda

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Posted 10 September 2018 - 11:44 AM

there must be something drawing a current from the battery while it's not in use. You need to investigate where that is, it could be your x-carlink or something else.


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#3 Richard B

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Posted 10 September 2018 - 12:43 PM

With the car off, put a current meter between the battery and positive lead, then remove and put back fuses and relays until you see a change.

 

Try do this in quiet place and listen out for any relay clicks when you pull off the battery lead. 



#4 johncbx

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Posted 10 September 2018 - 03:35 PM

I would have thought that the x-carlink is only drawing power whilst switched by the ignition key, unless other people have had one go faulty I haven't seen a post of this. I have never owned or used a multimeter nor know how to use one , I could get one if they are easy to use for checking this out.



#5 Bounder

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Posted 10 September 2018 - 08:25 PM

Try disconnecting the alarm in the boot behind the RH sidepanel/subwoofer. The small battery in there can go bad and draw enough to kill a battery over time.



#6 johncbx

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Posted 10 September 2018 - 09:44 PM

Am i better of buying a replacement battery for the alarm and just changing it just to be sure ?



#7 Richard B

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Posted 11 September 2018 - 01:24 AM

Hard to say. The battery might be fine, and you have something else going on. There are numerous conversations online about accords losing voltage, and not all of them are caused by the alarm.
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#8 Bounder

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Posted 11 September 2018 - 12:04 PM

 

Am i better of buying a replacement battery for the alarm and just changing it just to be sure ?

 
Given the battery is now 15 yrs old its probably done for at this stage.
I'd replace it for a start and see how it goes after that.
They aren't expensive cellpack solutions should be able to sort you out
This is one that has been recommended.
https://cellpacksolu...ox-sab-battery/
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#9 Mr Honda

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Posted 13 September 2018 - 08:37 AM

Battery is 6 months old Bounder.



#10 Bounder

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Posted 13 September 2018 - 12:07 PM

 

Battery is 6 months old Bounder.

 
I meant the Alarm battery, its a NI-MH so they have a limited lifetime.

#11 johncbx

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Posted 18 September 2018 - 08:12 PM

Hi, having done some online searching other people have had similar problems with battery drain and some have found/diagnosed that the relay for the a/c in fusebox going faulty and not switching off. This staying on causing constant drain on battery even though supposedly off , so i removed the relay and touchwood battery not gone flat for last four days so heres hoping its this.The a/c hasnt worked last few months but the condenser is falling apart so i thought it was that, I will replace with new relay before next summer also condenser but can live without it over winter.


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#12 Richard B

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Posted 21 September 2018 - 03:05 AM

Yes I read about that on Eric the Car Guy, but then Eric said in his experience it wasn't common.. so didn't point you there in case it wasted your time



#13 johncbx

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Posted 30 September 2018 - 09:57 PM

Hi , car has behaved itself up to yesterday and struggled to turn over so put on charge overnight so fine today . Guess i will change alarm battery next and see how it goes from there.

Thanks for suggestions so far guys.



#14 johncbx

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Posted 06 October 2018 - 03:55 PM

Hi i have disconnected the alarm battery no difference to drain on battery, bought a multimeter to attempt to find drain . I found that when i remove fuse number 15 under bonnet fusebox 40 amp  drain drops to almost nothing, book says ( back up acc ) anyone knows what this is for/ protecting ?



#15 Bounder

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Posted 06 October 2018 - 07:27 PM

The #15 feeds fuses 5,6,7,8 under the dash , now use the multimeter to check which of those fuses is powered up after the ecu is shut down.

It could be something like a faulty door solenoid or similar, start by working through those fuses to find which one is the problem.


Edited by Bounder, 06 October 2018 - 07:27 PM.


#16 johncbx

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Posted 06 October 2018 - 09:45 PM

Thank you Huan i will try tomorrow in day light.



#17 johncbx

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Posted 08 October 2018 - 10:08 PM

I tried chasing this drain only to goose the fuses in the multi meter so next job is find fresh fuses and try again, all good fun. just to play safe for now i have bought a powerpack to start when battery goes flat again.


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#18 johncbx

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Posted 09 October 2018 - 09:52 PM

Good job that I bought the battery booster, today went out drove in excess of 50 miles stopped at destination. I needed to move car a few moments later battery totally dead trying to start lights on dash just flickered and car wouldn't turn engine over out with the booster pack and instant start. I really need to sort this problem out, put battery on charge as soon as i got home then removed the two things that i have added which is X-Car link and led bulbs in interior roof lights. X-Car link been in around three years and led bulbs about four months so will see what if any change on battery plus i will buy another multimeter as no joy trying to find correct fuses for the laser one i bought from halfrauds.  



#19 johncbx

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Posted 19 October 2018 - 11:00 AM

Hi i haven't managed to find the fault yet but got a strange problem when testing i find that power draw is almost nothing when fuse six is removed under dash fuse box but with this removed the radio and all displays are off but heating still works but no display , the  user manual shows that fuse number 5 is for the radio and 6 is for the interior lights ? anybody got any ideas help please.



#20 Bounder

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Posted 20 October 2018 - 07:32 AM

You may need to check the door light switches to make sure they are all turning off and the door locks as well.