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Old 06-14-2005, 19:48   #1 (permalink)
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Help. whats draining my battery?

Hi does any one know what could be causing the battery in my XP to loose its charge after a couple of days.
Its fine if i disconnect it so i'm guessing something must be draining it.

cheers
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Old 06-14-2005, 19:59   #2 (permalink)
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Re: Help. whats draining my battery?

Quote:
Originally Posted by BlueXP
Hi does any one know what could be causing the battery in my XP to loose its charge after a couple of days.
Its fine if i disconnect it so i'm guessing something must be draining it.

cheers
Alarm system, boot light, interior light, clock. I'd assume there must be something connected to the battery thats non-genuine draining it.
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Old 06-14-2005, 20:10   #3 (permalink)
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Re: Help. whats draining my battery?

there's no alarm or stereo but as for interior light it was
staying on so i just removed the bulb :) this couldn't
still be draining power could it ? It also has an electric fan
which im not sure whether thats genuine or not.

cheers
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Old 06-14-2005, 21:13   #4 (permalink)
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Re: Help. whats draining my battery?

It means the circuit is still powered but it shouldn't be enough to drain a battery. The fan you have if it's a thermo fan and is triggered by a temp sender? You don't want it running after the car is turned off.
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Old 06-15-2005, 05:13   #5 (permalink)
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Re: Help. whats draining my battery?

In my experience if the regulator has been replaced with a solid state type (as most cars that age have been), then an internal failure can drain the battery. The regulator can still function normally, but left overnight it does drain the battery. If your regulator is in the alternator this may not apply but I think it is still a possibility.
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Old 06-15-2005, 06:55   #6 (permalink)
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Re: Help. whats draining my battery?

hey whats a regualator and how do i check/fix it?

anyway thanks for your help
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Old 06-16-2005, 00:14   #7 (permalink)
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Re: Help. whats draining my battery?

A regulator is a piece of electrickery equipment in circuit between the alternator (or generator), and the battery. It dictates the amount of charge available to the battery. BUT if it goes wrong it can also drain the battery.
If it is an external unit (not in the alternator), it is about 2.5 inches square oten with a black top and silver base. The top may have initials stamped above terminals, and of course ther will be several wires attached. Not sure where to find it on an XP, but have a look on your radiator support panel.
An auto sparkie will point it out in no time flat. As for testing, just swap it out as this is usually cheaper than buying the gear to test this stuff.
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Old 06-16-2005, 08:45   #8 (permalink)
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Re: Help. whats draining my battery?

Thanks mate i'll have a look at that on the weekend
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Old 06-17-2005, 01:49   #9 (permalink)
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Re: Help. whats draining my battery?

You may have several wires going to/from the + terminal of the battery. It helps to isolate which one(s) is sucking the 'trons.

ie: one from the alternator (yellow?), another to the fuse box (yellow), fat one to the starter and possibly another small one to the starter solenoid.

Undo the + terminal and take it off. Then separate all these individual wires.

Do you have a multimeter?....cheapo for $15. If so, set it to AMPS (current) and measure between each wire and the + terminal separately (series). See which one(s) register a reading.....and then you can narrow in on the problem.

If it's the yellow(?) one going to the fuse box, try taking one fuse out at a time and see if the current draw stops (check battery wire again). Then when you've found the problem circuit, either leave the fuse out, of it its an important one, search for the problem. If you have a problem in finding it, just undo the + terminal each time you leave the car

Most cars will have a small drain as mentioned (stereo/clock/alarm etc). The current draw from these things shouldn't be above 50 milliamps (0.050 Amps).

TIP 1: most multimeters have a 200 milliamp limit. As soon as you connect it to the wires, it will blow the fuse inside the meter (if the current draw is any higher, which is very probable in your case). I suggest you buy a multimeter with a 10 AMP option in addition to the standard 200mA setting. Measure the fault with this setting first. If it reads below 0.2 Amps (200mA), then you can use the smaller setting.

TIP 2: DON'T check the battery wires with any car doors open. The draw from interior lights will fry your multimeter!! Close the door after each time you check a fuse.

Good luck in chasing those gremlins!!

[edit] if you don't have a multimeter, check for a small spark from each wire. ie: flick it onto the + terminal. Even a small 50mA current will cause a spark.
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