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My 2004 Alero has a problem when it rains. It won't start after it was rained and it seems to me that something is getting wet under the hood and causing this that I have to let it sit after it rains, maybe to dry out? But then it'll start after ours been sitting a day or so after rainfall. Any idea if this is a ground wire or where I should begin to look? Thank you

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  • Niki Aug 05, 2013

    I found out that I had my battery ground wire about an inch exposed. This was causing my car to have electrical problems and not start when it rained,

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  • Cars & Trucks Master
  • 21,873 Answers

I doubt anything is getting wet, but you could be right on a bad connection. You could have enough humidity in the air after a rain to cause a weak connection to fail completely. It could also be a faulty relay.
Someone would need to figure out if you are lacking spark to the plugs or fuel pressure when it fails to start, then track down why.

Posted on Jul 13, 2013

Testimonial: "It was a ground wire that was exposed "

  • Niki Jul 13, 2013

    I am going to try new plugs and wires. Thank you! I'll keep posted on here to let you know if it worked.

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SOURCE: Windstar stalls when it rains and gets wet

this is from a different post

http://www.fordwindstarrecall.info/

Posted on Jul 21, 2008

suterman
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SOURCE: AC blows warm air when it rains

It sounds as if you have an ambient temperature sensor that is either shorting out when it gets wet or either the water is acting like an insulator and sends an incorrect reading to the body control module. You may want to contact BMW to the specific location on your particular year and model. As location will vary with model and year.

Posted on Jul 02, 2009

peterrance19
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SOURCE: Carpet gets wet after a rainfall.

check your windscreen rubbers water will always track to the lowest point try putting a hose on the screen

Posted on Nov 13, 2009

wracefans24
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SOURCE: 2004 Hyundai Sonata won't start or starts hard in

try replacing the plug wires,it sounds like they are bad,

Posted on Dec 27, 2009

Dirt Dobber
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SOURCE: Everytime it rains real hard. car won't

Obviously water is the cause. Make sure all hood seals and underbody splash shields are in place, check firewall main connector for security. After it rains (without driving it in rain) check floor mats inside for water. A possible windshield or dash leak is allowing water into electrical area near instrument cluster (windshield may need resealed). Lift hood and look for water on any electrical connections disconnect dry, and seal with tune up grease from parts store.
Good luck

Posted on Aug 24, 2011

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