Question about 1993 Volvo 940

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Battery is dead after a nights rest..like something is draining it or left on. nothing appears to be on but then again i could be missing something on a foreign car.

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  • 4 Answers

Could be a bad voltage regulator or something that is missed is. do you have the lights in your visors around the mirrors .if so make sure they are not on

Posted on Nov 07, 2012

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Posted on Jan 02, 2017

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SOURCE: occasional dead battery

Have you added anything lately?
Have the alternator, wiring and belt checked by the the place that installed it.
Check the battery connections. Are they tight? Are they corroded?
If there is a short somewhere it my be difficult to find. You may have to take it to a mechanic.
One more thing you can do is at night start the car turn everything on and shut the car off. Get out and walk around the car to be sure nothing stayed on. Do the same inside.
Good luck!

Posted on Oct 12, 2009

rickyrt441
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SOURCE: after turning off my car the next morning my

Make sure you check for moisture spots around the battery. It may be leaking and it might not be holding a charge. Make sure the terminals are cleaned and very tight on the ends. Sometimes, the end needs put on better. It may be your alternator draining your battery. You can check like this. Start your car and take the hot side battery terminal off. If it dies instantly, your alternator is bad. You will usually see dimming lights outside and in the cab. Scan the battery wires. Make sure nothing is loose.

Posted on Feb 26, 2011

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I have a 2013 Chevy Tahoe with an unexplained battery drain, what could it be? help please


You could have a parasitic drain. Something that is left on in the car and drains the battery. It could also be a corroded terminal on the battery where the alternator is not getting power to charge the battery . Clean the post and the connector of all deposits and install those felt washers under the terminals to impede further corrosion.

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a battery with (1) dead cell will do it ! alternator not charging ! dirty battery & terminals would ground out battery .bad corroded battery cables radio left on, dome light left on, something left on ! see what you have , balls in your court, make it happen

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Battery goes flat over night


You'll need to have someone check for a battery drain.
Something in the car is using electricity when the key is off, or the battery has an internal short and is draining itself.
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Well, something seems to be draining your battery. Are any accessories left on? Too unusual to get a bad new battery. Get a load test done on the battery...will tell you if the battery is holding a charge. If it is fine, then the alternator might be faulty and would not charge the battery as you drive. Hope this helps. Worst case there is a short somewhere in the electrical system that is draining your battery.

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Turned off my 2006 Escape & now it won't start.


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