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P38A Electrickery drain,where am I going wrong?

Discussion in 'Range Rover' started by tomcat59alan, Mar 6, 2018.

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  1. NVB

    NVB Member

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    I had a 250ma drain on my L322 and it flattened the battery in 3-4 days. A clamp meter and a multimeter found about half the drain, which was the mobile phone module. I have yet to find the rest cos it is much better now and I gave up looking. Might start again in the spring, but it's not too difficult to find once you get going.
     
  2. Zorro587

    Zorro587 Active Member

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    Just as an aside (I too use the 2nd fob for the rf receiver) but have you checked that the LED at the side of the gear selector has completely extinguished (BECM gone to sleep)? Nice and easy on these dark nights...
     
  3. brianp38dse

    brianp38dse Well-Known Member

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    Bit of a problem with that as Alan has a manual same as me and there is no light:( which makes it a bit harder to tell if becm is sleeping.
     
  4. DanClarke

    DanClarke Well-Known Member

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    I thought there were 2 states for the LED's "Barely glowing"=BeCM asleep and "Clearly alight" = BeCM awake. But maybe I have that wrong.
    I will check what I have read previously.
     
  5. tomcat59alan

    tomcat59alan Well-Known Member

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    Bloody hard for me, its a manual.;):D but thanks for thinking about my problem.
     
  6. tomcat59alan

    tomcat59alan Well-Known Member

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    You beat me to it this time Brian, 1 all.:D
     
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  7. Zorro587

    Zorro587 Active Member

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    Manual? Wot...like a book? :D
     
  8. Saint.V8

    Saint.V8 Dyed-in-the-wool 100% RR Junkie

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    Yes, I didnt account for resistance I guess......as I said, I am not a leccy man....many thanks for clarifying.
     
  9. tomcat59alan

    tomcat59alan Well-Known Member

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    Yes, well it is read I mean Red.;):D
     
  10. tomcat59alan

    tomcat59alan Well-Known Member

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    Still waiting for the patch leads, bloody Royal Mail. Round I live on doesn't have a dedicated delivery person, we only get post if anyone who has finished their round wants overtime.:mad:. The car started yesterday and I used it all day without a problem by the way. From other posts it looks like I'm not the only one with this fault.:(
     
  11. pete12345

    pete12345 Active Member

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    What a a way to run a business lol only get post I’ve overtime’s required and I think ur right regarding the battery drain I think I’ve been lucky so far in that respect and I’ve still got the old type reciver in the boot
     
  12. DanClarke

    DanClarke Well-Known Member

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    Aye, it used to be run as a "Service" and not for a profit. Now it has shareholders to pay and not customers to SERVE.
     
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  13. tomcat59alan

    tomcat59alan Well-Known Member

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    Update, the leads have arrived. Job for tomorrow I think.:(
     
  14. DanClarke

    DanClarke Well-Known Member

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    In this rain..... certainly
    Good Luck! Keep us all posted..
     
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  15. tomcat59alan

    tomcat59alan Well-Known Member

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    Well, I ventured out to the garage today and took the charger off and disconnected the battery. Connected the multimeter between the earth strap and the -'ve terminal. Put a spare bonnet catch in the o/s bonnet lock.Locked the car and waited for a couple of minutes for the becm to go to sleep and the meter showed a reading of 0.87 amps. I pulled every fuse and relay and the reading stayed the same. I also pulled the eas relay. Reconnected the battery and disconnected the r/f and second fob receivers, I'll see what happens tomorrow.
     

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  16. mystery

    mystery Active Member

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    your multi meter is set on AC current range not DC range so that figure is incorrect does it not have a DC current range you would get the true drain using or loaning a old Avo-mk 8 analogue multi meter less small electronics components to be affected by the outside Temperature and means of manual calibration
     
  17. Pete The Biker

    Pete The Biker Active Member

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    Hi Alan

    That's a chunky current. It looks like you have the meter set to read AC Amps (~A). Is that the right setting on your meter for reading DC Amps?

    I have a feeling the becm would take a lot longer than a couple of minutes to go to sleep - someone else may be able to comment on how long.

    My old Subaru Impreza had a current drain - that turned out to be a faulty tracker which was hard-wired in to the battery via its own in-line fuse. Do you have any accessories which might be the culprit?

    Pete
     
  18. tomcat59alan

    tomcat59alan Well-Known Member

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    Thanks for your reply s, I know nothing as you might have gathered . I will have a word with my son in law and get back to you.
     
  19. pete12345

    pete12345 Active Member

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    Happened to mine years ago when 1st brought it dealer said he had same problem when left for few days mine was self levelling all week why I was working away
     
  20. tomcat59alan

    tomcat59alan Well-Known Member

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    Thought of that Pete, I pulled the eas relay, ta.Don't need the RR at the moment as I'm not driving, the chauffeuress likes her X type.:eek: I'll have another look when the weather improves.;)
     
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