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Electronics In Car Entertainment (ICE), Sat-Nav, lighting, wiring etc.

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post #11 of 14 (permalink) Old 19th January 2007
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Speaker wires

As others have said already...

The polarity of the speaker wires will make no difference to battery drain. The + & - designation is only an indication of the output from the amplifier to ensure that both/all speakers are in phase. I.e. the cones are pushing & pulling at the same time in the same direction. It does not not relate to +12V & Earth. Speakers are AC devices, not DC like most electrical items on a car.

If both rear speakers were connected the "wrong" way round compared to the fronts, or if one rear speaker was connected the "wrong" way and the other , the correct way, that would probably produce a kind of hollow or tinny tone to the music. Even more so if you have tweeters connected, which are out of phase or "wrong" way round.

It sounds more like the battery has drained while you've been working on the car with the interior lights on, maybe the fan going too... etc.
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post #12 of 14 (permalink) Old 25th January 2007 Thread Starter
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Thanks all. After much thinking, I did have the boot open for almost two hours, with the light on......that would have done it!

Have now purchased newer bigger wattage speakers (installed 'tothers in front) and reinstalled with wiring correct way and have had no problems until.......

.........went to car this morning, covered in snow, and battery had died again (has been fine since I recharged a week ago). Can only assume that battery is indeed nearing the end of its life and cannot even stand up to a cold engine bay. New heavy duty battery should resolve that!!

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post #13 of 14 (permalink) Old 25th January 2007
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Batteries can suddenly fail - mine did when on a call-out... 5 minutes at the side of the road with lights & beacon on, and she was flatter than a pancake!!

Some people say I'm stark raving bonkers, the others just smile and nod...
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post #14 of 14 (permalink) Old 25th January 2007
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Yep,sounds like your battery is deceased.

They can indeed go just like that,and especially in extremes of temperature(i.e the height of summer or in a winter cold snap).

Spend a resonable amount on a new battery,as the cheap ones tend to give problems.

I'd rather push my Alfa than drive a BMW....
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