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02 Explorer Voltage Issue - won't start ; gauges going haywire

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Old 07-02-2010, 03:33 PM   #1
BrandonB8
St. Louis
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02 Explorer Voltage Issue - won't start ; gauges going haywire

I went out to run an errand this morning and the truck wouldn't start. Acted like a bad battery so I checked the voltage with the terminals hooked up. Sure enough it was down around 9. So I disconnected the terminals and checked and was getting 13. So I have a drain somewhere. CHecked the alternator and that didn't affect the voltage. When I turn the key to the on position everything seems fine, but as soon as it goes to run the gauges go back and forth, the relays start clicking like crazy and it won't turn over. Anyone have any ideas where to start. Its not a bad starter but I'm wondering if it could be either the ignition key switch or something like that. any help is greatly appreciated.
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Old 07-02-2010, 03:52 PM   #2
JDraper
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Even though you're reading a decent voltage, your battery may still be shot. Don't know if the Explorer's do it, but when the battery starts to go flat in other Fords, the gauges will swing full scale when the key is put in the run position.




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Old 07-02-2010, 03:59 PM   #3
BigRondo
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I have read a lot of posts about a "low" battery causing all kinds of weird issues. Maybe you should get the battery load tested. Here is a good link with info about testing the battery:

http://autorepair.about.com/library/.../aa101604a.htm

Hope this helps out.




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Old 07-02-2010, 04:13 PM   #4
BrandonB8
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I'll try it out. Thanks for the quick responses. This forum rocks.
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Old 07-02-2010, 04:16 PM   #5
BigRondo
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Keep us posted!




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Originally Posted by FIND on 4-22-13
Don't mess with Boston. They will drop everything, hunt you down, and then go on like you never existed once they are done cleaning up the mess.
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Old 07-02-2010, 08:10 PM   #6
h_chute
Lantana Florida
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I have an '02 Eddie Bauer, and it just started doing the same thing! It starts, but sounds like it is having trouble. Then the guages peg right, then return left and go to the normal position. I've put 3 batteries in her in the last 3 years. Interesting.......
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Old 07-16-2010, 12:14 AM   #7
therover1991
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I had this problem twice with my car, both times it was the alternator.
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