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Old 01-15-2014, 09:44 AM   #1
jes3k
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What's This? *PIC*

The ground wire coming out of this block is broke at the block. But I have yet to find someone who can tell me what the block is.

Car is a 2007 SE 3door with the 2.0L

https://www.dropbox.com/s/uzttu8e7pa...112_165506.jpg



Last edited by jes3k; 01-15-2014 at 09:45 AM. Reason: Unable to get image to display in post
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Old 01-15-2014, 09:57 AM   #2
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It is a 'capacitor' for noise suppression
Replace it!
There are reports of the other [hot] lead coming off and shorting and blowing fuses intermittantly
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Old 01-15-2014, 10:06 AM   #3
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^ This. It helps reduce interference from the alternator, Coil on plugs, pretty much any engine electrical noise created.
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Old 01-15-2014, 10:38 AM   #4
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Thanks for the quick replies! I had my alternator replaced in June, 2010. Last Thursday my alternator went out again while I was out of town. Replaced it, but noticed the broke ground wire. The guy at the parts store where I was replacing the alternator didn't have a clue as to what it was. Drove home with no issues. Next day another fried alternator.

Based on your information this is the culprit, right? I've inspected the wiring around the hatch as I read of people having issues with shorted wires from the hatch burning up alternators.
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Old 01-15-2014, 11:09 AM   #5
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This shouldn't cause an alternator failure. It more or less reduces the electrical interference given off from the alternator as to not cause radio reception and module communication issues.

As far as the alternator goes, you could have bad cables going to your alternator or be getting bad parts. I've replaced my fair share of alternators at the dealer with re manufactured motorcraft ones only to fail a couple days later. Load test and voltage drop your main power wire going to the alternator. Also make sure the contact point where the alternator bolts to the block is clean. These alternators are chassis grounded.
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Old 01-15-2014, 11:11 AM   #6
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Also, what was your charging system voltage after you replaced the alternator the first and second time. There are sense circuits that could be faulted causing the alt to overcharge.
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Old 01-15-2014, 12:12 PM   #7
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When you replace an alternator, it's a really good idea to fully charge the car battery prior to firing up the motor with the new alternator.

If the battery is half dead, the new alternator can kill itself trying to fully charge the battery. Many alternators even have a little warning card in the box to this effect.
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Old 01-15-2014, 12:58 PM   #8
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Quote:
Originally Posted by elsolo View Post
When you replace an alternator, it's a really good idea to fully charge the car battery prior to firing up the motor with the new alternator.

If the battery is half dead, the new alternator can kill itself trying to fully charge the battery. Many alternators even have a little warning card in the box to this effect.
Makes sense. With my limited electrical background I should know better.

Quote:
Originally Posted by boardliquid01 View Post
Also, what was your charging system voltage after you replaced the alternator the first and second time. There are sense circuits that could be faulted causing the alt to overcharge.
Inexperienced "mechanic" here. (I actually do not come close to meeting the requirements for such a title.) To stay concise, the June 2010 alternator was replaced by an actual mechanic through my extended warranty. The alternator I put on the car over this last weekend was then tested by O'Reily. Everything passed. I did not get the actual voltage reading then.

When the alternator light came on the day after, I measured 12.0V while the engine was running and while the engine was off with my multimeter.
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Old 01-15-2014, 01:58 PM   #9
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If the first alternator was replaced under your extended warranty, these usually carry a 12,000 or 12 month replacement policy on the parts and labor.
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Old 01-15-2014, 04:47 PM   #10
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Quote:
Originally Posted by boardliquid01 View Post
If the first alternator was replaced under your extended warranty, these usually carry a 12,000 or 12 month replacement policy on the parts and labor.
The first thing I checked was to see if it would be covered. The new alternator has a lifetime warranty on it, but I need to find what's causing the alternator to go out so soon.
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