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Battery drain questions for the electronically inclined. 

 

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 Post subject: Battery drain questions for the electronically inclined.
Posted: Fri Feb 08, 2013 11:40 am 
Getting Side Ways
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Age: 32

Posts: 1044

Joined: 4th Aug 2010

Ride: NA Fairlane, DC LTD

Location: Alice Springs
NT, Australia

Hey there.

Doing some testing to try and figure this battery drain.

Can anybody tell me what sort of draw the battery should have just sitting.

I have the mA floating around 27 - 29.0, I pulled fuses and relays one by one in the car, and under the hood. No change. I disconnected the sub amps and that made no difference. I unplugged the alternator plug an that dropped it to dead 0.

I reconnected the alt plug and went through the fusible link plugs at the positive terminal, no drop at all, except the white/black wire from the positive to the alternator reg drops it to zero. There is a steady 12.9v going through this wire.

Crossing the alt main yellow wire terminal to ground shows 13.1V.

I'm assuming there should be some sort of low draw, but everything either dose nothing or cuts it off completely. Can't find a half way point.

The car is killing batteries pretty well. It drained a new battery in 2 days and has killed it, the "eye" won't go green again with a decent charge time..

Any ideas on what else I can try?

 

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[color=#004080]Cheers, Jacob.

NA Fairlane Build thread:
the-garage-f53/my-fairlane-build-lowlane-t94891.html.
Also in the garage....
AU LTD, DC LTD, and Lowlane.

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 Post subject: Re: Battery drain questions for the electronically inclined.
Posted: Fri Feb 08, 2013 11:51 am 
Getting Side Ways
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Age: 34

Posts: 1110

Joined: 27th Dec 2011

Gallery: 6 images

Ride: ef falcon futura

Power: 154 rwkw

Location: Koo Wee Rup
VIC, Australia

i can run through the factory ef manual test procedure here if you want. should be similar

 

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ef futura, pacemakers, 2.5inch catback, k&n panel filter and 3.45 lsd. extractors/cat, ticky head, custom cam grind, t5. now onto cosmetics.

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 Post subject: Re: Battery drain questions for the electronically inclined.
Posted: Fri Feb 08, 2013 2:11 pm 
Getting Side Ways
Offline

Age: 32

Posts: 1044

Joined: 4th Aug 2010

Ride: NA Fairlane, DC LTD

Location: Alice Springs
NT, Australia

Sorry, you lost me on that one..

Which factory test procedure?

What is it similar to?

If it isn't too complicated I can call you or something..

 

_________________

[color=#004080]Cheers, Jacob.

NA Fairlane Build thread:
the-garage-f53/my-fairlane-build-lowlane-t94891.html.
Also in the garage....
AU LTD, DC LTD, and Lowlane.

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 Post subject: Re: Battery drain questions for the electronically inclined.
Posted: Fri Feb 08, 2013 2:57 pm 
Getting Side Ways
Offline

Age: 34

Posts: 1110

Joined: 27th Dec 2011

Gallery: 6 images

Ride: ef falcon futura

Power: 154 rwkw

Location: Koo Wee Rup
VIC, Australia

i'll scan the pages and put them up. basically its if you have got certain voltages/resistance at certain points, your looking at an alternator fault

 

_________________

ef futura, pacemakers, 2.5inch catback, k&n panel filter and 3.45 lsd. extractors/cat, ticky head, custom cam grind, t5. now onto cosmetics.

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 Post subject: Re: Battery drain questions for the electronically inclined.
Posted: Fri Feb 08, 2013 3:18 pm 
Getting Side Ways
Offline

Age: 34

Posts: 1110

Joined: 27th Dec 2011

Gallery: 6 images

Ride: ef falcon futura

Power: 154 rwkw

Location: Koo Wee Rup
VIC, Australia

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_________________

ef futura, pacemakers, 2.5inch catback, k&n panel filter and 3.45 lsd. extractors/cat, ticky head, custom cam grind, t5. now onto cosmetics.

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 Post subject: Re: Battery drain questions for the electronically inclined.
Posted: Fri Feb 08, 2013 11:26 pm 
Getting Side Ways
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Posts: 6449

Joined: 11th Nov 2004

If the current draw stops when you unplug the alternator, replace it. problem solved.

 

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 Post subject: Re: Battery drain questions for the electronically inclined.
Posted: Sat Feb 09, 2013 12:18 pm 
Getting Side Ways
Offline

Age: 32

Posts: 1044

Joined: 4th Aug 2010

Ride: NA Fairlane, DC LTD

Location: Alice Springs
NT, Australia

Sweet, that's legendary!

Thanks heaps Ranga. That was my new thing learned for the day. I do have the factory manuals but didn't think of looking there yet...

Thanks also Tickford, I did just replace the alternator for a better looking unit that had an aftermarket rebuilders sticker on it. It seems to charge good, but i think I remember something about them still being able to wear and short out some way that dosnt affect it's charging ability.

Unfortunately though.
Yesterday arvo the engine died in it.

Check out my build thread for details..

 

_________________

[color=#004080]Cheers, Jacob.

NA Fairlane Build thread:
the-garage-f53/my-fairlane-build-lowlane-t94891.html.
Also in the garage....
AU LTD, DC LTD, and Lowlane.

Top
 Profile  
 
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