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Replacement battery

Discussion in 'Fuel System & Electrics' started by Jenny Frappell, May 6, 2019.

  1. Grantus

    Grantus Well-Known Member

    Messages:
    15,565
    Location:
    Southern ACT
    Bus was diagnosed with the radio draining the battery, and the auto electrician disconnected it, and reported that the wiring was incorrect.

    Yesterday I reconnected the radio, and within 24 hours, it had indeed drained the battery a lot. So I pulled the unit out to check the wiring. The wiring is all correct......so I swapped the unit out, and replaced it with one from the SC.

    Now it’s all good, (with the wiring unchanged), so the head unit has developed a fault, that’s causing it to drain power constantly....... time for the bin! ;)

    The SC is still losing power, even with the keyless entry disconnected, so the search on that one continues.......
     
    Last edited: May 22, 2019
    grumble and Luckyphil like this.
  2. syncro

    syncro Well-Known Member

    Messages:
    9,287
    Location:
    Southern Highlands
    Probably nothing wrong with the radio but the design. Most stereos are supposed to be used with an accessories switch which VWs do not have.

    Pull the globes out of your interior lights.
     
  3. Barry

    Barry Well-Known Member

    Messages:
    3,483
    Location:
    Abbotsford NSW
    Have you tried charging the battery and see how long it holds charge if it is just disconnected?
     
  4. Grantus

    Grantus Well-Known Member

    Messages:
    15,565
    Location:
    Southern ACT
    It’s a Blaupunkt unit, that has been in there for 10 or more years happily, but developed a fault in the last couple of months.......
     
    Last edited: May 22, 2019
  5. Grantus

    Grantus Well-Known Member

    Messages:
    15,565
    Location:
    Southern ACT
    Going to do that to the SC on Friday, whilst it’s not in use. ;)
     
  6. Poptop

    Poptop Well-Known Member

    Messages:
    849
    Location:
    Clifton Hill, Victoria
    Unit arrived from a EBay, App installed just need to connect so I can share similar grief
     
    Grantus likes this.
  7. Grantus

    Grantus Well-Known Member

    Messages:
    15,565
    Location:
    Southern ACT
    I thought “”grief” too, but more with the tech side......

    But alas, @drivesafe ’s suggestion is a great one.

    Already spent 4 x the cost with auto electrician experts, who did actually identify one of the problems, but not the cause or solution.....


    It’s another fun twist adventure and education, of keeping old vehicles healthy, with utilising new methods. ;)
     
    Last edited: May 22, 2019
    David H, Poptop and Luckyphil like this.
  8. cbus

    cbus Well-Known Member

    Messages:
    11,654
    Location:
    sunshine coast
    Likely the Reality is a case of a fail in modern stereo. :p
     
    Grantus likes this.
  9. Grantus

    Grantus Well-Known Member

    Messages:
    15,565
    Location:
    Southern ACT
    It came with a blank Dash plate when I bought it new.

    Had I not removed the factory blank plate..... it would still be good with no issues! :D
     
    Wayne murray likes this.
  10. Wayne murray

    Wayne murray Well-Known Member

    Messages:
    2,777
    Location:
    Seven hills
    You just have to put it back theno_O;)
     
  11. cbus

    cbus Well-Known Member

    Messages:
    11,654
    Location:
    sunshine coast
    Exactly.
    VW avoided technology as long as possible for a reason.....
    Even if the reason was they couldn't handle it.
     
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  12. Grantus

    Grantus Well-Known Member

    Messages:
    15,565
    Location:
    Southern ACT
    Luckily, I still have it. ;)

    If I can’t sort the issues......... I still have a fallback position. :D
     
    David H and Luckyphil like this.
  13. Wattie

    Wattie Well-Known Member

    Messages:
    913
    Location:
    Mildura. Victoria. Australia.
    I've always had the battery slow drain issue but with so much extra electrical gear in my beast I just put up with it.:oops:

    At home I hook up to the portable solar panels that I put on the roof of the garage these keep the T3 "alive" when not in use.

    When free camping I switch over to the vehicle mounted panels........................works for me. :)
     
  14. Grantus

    Grantus Well-Known Member

    Messages:
    15,565
    Location:
    Southern ACT
    Firstly, apologies for the thread hijack...:oops:

    Results are in, and after 48 hours of being charged and then disconnected, it’s happily holding steady at 12.5v, so the SC battery seems fine. I think I can rule out a battery issue.

    Now to dig deeper......
     
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  15. Poptop

    Poptop Well-Known Member

    Messages:
    849
    Location:
    Clifton Hill, Victoria
    So I should get something that cranks 650?
    Using this Snapseed app as well for the first time! 698830FC-AF23-44E9-BF54-C8D5031F1E18.jpeg
     
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  16. cbus

    cbus Well-Known Member

    Messages:
    11,654
    Location:
    sunshine coast
    In practical terms there's not much difference but given that sometimes kombis can be hard to start for various reasons I go by the mantra that bigger is safer.
    650 has a good margin.
    Think a Kombi starter only pulls about 250 amps of top of head .
    Reserve is the useful number.
    It should have some bearing on capacity of battery when amps capacity not mentioned

    Anything up to 277mm long will fit if you choose from the European sizes .http://www.supercharge.com.au/supercharge-gold-plus.html

    That gives a choice up to 750 CCA.
    154 reserve capacity.

    580- 650 is fine and biggest normally chosen.

    If having some acessories running off the starter when engine not running then go one of the dual purpose batteries or biggest starter reserve capacity possible to prevent killing it prematurely.
     
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  17. Barry

    Barry Well-Known Member

    Messages:
    3,483
    Location:
    Abbotsford NSW
    Might be time to start a separate thread

    Anyway......... this means “something” in the car is drawing power.

    If you put your multimeter on amps and in series with +’ve battery it must register amps. Or more likely milli amps.

    Then start pulling fuses till it goes to 0 amps.

    If you pull all the fuses and it still has a reading it means the offending circuit is tried into the battery circuit somewhere else.

    Do you have circuits coming off the side / spare power tabs on the fuse block?
     
    Grantus likes this.
  18. Mellow Yellow 74

    Mellow Yellow 74 Active Member

    Messages:
    844
    Location:
    Sydney
    For a T3 you also need to consider the height - needs to be 175mm or less to fit under the seat without shorting out against the metal cover
     
    Grantus likes this.
  19. cbus

    cbus Well-Known Member

    Messages:
    11,654
    Location:
    sunshine coast
    True.
    The above applies to bay only.
    Pays to have the correct recessed terminal batteries in the "3".
     
    Last edited: May 29, 2019

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