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battery going flat 

 

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 Post subject: Re: battery going flat
Posted: Mon Dec 13, 2010 12:25 am 
Oompa Loompa
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TimmyA wrote:
...
And when you lost continuity you did what to stop the battery going flat? Left that fuse out so thet circuit didn't work at all? :?

...


Thanks Tim.

I need to have a good think about what you say. Always happy to learn more.

It led me to an amp that was open circuit (if that is the correct terminology) somehow to its earth. Disconnected that and the battery doesn't go flat.

Sorry to highjack thread.

neil
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 Post subject: Re: battery going flat
Posted: Mon Dec 13, 2010 12:29 am 
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TimmyA wrote:
TimmyA wrote:
you are on the right line...

if you pull the inst fuse with the battery connected, and stick the multimeter across its terminals what do you get (set on amps)... You always start with the largest scale and work down to you can get it accurate...



I don't know how else to explain it? :?


Ok... This is as super basically basic as I can go...

Connect everything back up the way it normally is...
Get inside the car
Remove the fuse panel cover to the lower right of the steering column
Remove one fuse
Set meter to DC amps 20 or 10 amps scale
place red probe on the right side of the fuse hole
place black probe on the left side of the fuse hole
record the current and direction (positive or negative number)
replace the fuse
repeat with another fuse
repeat with another fuse
keep repeating until all fuses have been tested...

place list of currents on here and which fuse they were linked to

we will go from there... I'll trace the circuit diagrams and tell you what to unplug to try...

Does that make sense?

 

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 Post subject: Re: battery going flat
Posted: Mon Dec 13, 2010 12:31 am 
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grnxr wrote:
TimmyA wrote:
...
And when you lost continuity you did what to stop the battery going flat? Left that fuse out so thet circuit didn't work at all? :?

...


Thanks Tim.

I need to have a good think about what you say. Always happy to learn more.

It led me to an amp that was open circuit (if that is the correct terminology) somehow to its earth. Disconnected that and the battery doesn't go flat.

Sorry to highjack thread.

neil


open circuit implies that no current flows so that couldn't be causing it to go flat... an amp that was always on would? the amp itself was faulty or the way it was wired?

Cheers,
Tim

 

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 Post subject: Re: battery going flat
Posted: Mon Dec 13, 2010 12:46 am 
Oompa Loompa
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TimmyA wrote:
...
And if you disconnect the -ve (leaving all wires connected together) lead and test between it and the body you will get 12Volts... No circuit, so resistances are negligible... So no voltage drop and 12V will be present at the -ve lead with reference to the -ve battery post... So this proves what? :? ...


No - test voltage between the body and -ve battery post (not lead).

OK amp was closed circuit then. Yes? - i.e. constant 12V to earth - similar to connecting battery positive to the car body and I assumed faulty/broken :( .
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 Post subject: Re: battery going flat
Posted: Mon Dec 13, 2010 12:48 am 
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not short circuit? if it were short circuit it should have blown a fuse... If you hooked the battery positive to the earth (the body is joined to the negative) can you imagine the sparks that would fly? 550cca with a car battery or there abouts...

 

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 Post subject: Re: battery going flat
Posted: Mon Dec 13, 2010 12:58 am 
Oompa Loompa
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The fuse is like a nail - 100 amp from memory. Maybe something in the amp took the 'edge' off it :lol:. Either way I think I have a fried amp :(.

Anyway good luck ferr007 and thanks Tim.
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 Post subject: Re: battery going flat
Posted: Mon Dec 13, 2010 2:47 pm 
Tyre Shredder
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ok i will check all the currents in the next couple of days and let you know what they are

thanks for the help
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