Honda Civic (2001 - 2005) Coupe / Sedan / Hybrid (Includes Acura EL)

Help! Replaced Alternator, Car won't start.

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Old Sep 7, 2015 | 04:01 PM
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kaivorth's Avatar
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Default Help! Replaced Alternator, Car won't start.

Long story short, was driving on the highway, my speedometer stopped working. Then the red battery symbol came on. Later that day, all my sensors stopped working (Fuel, RPM meter, radio, lights went dim) Finally my car just died. Red Battery light came on (Charging system)




Figured it was the alternator, had a lot of low voltage o2 sensor codes and whatnot.

Car now starts, still has charging symbol.

UPDATE
I feel like an idiot. The Negative Terminal on my battery wasn't tight of all things. Tightened it down, started her up, and my charge light was still on. I had blown the alternator fuse from not having my negative terminal connected when I first tried to start it. Diagnosed with the help of a mechanic at this point ugh. Replaced the fuse and all is good.

Last edited by kaivorth; Sep 13, 2015 at 09:17 AM.
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Old Sep 7, 2015 | 05:45 PM
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Default Re: Help! Replaced Alternator, Car won't start.

How about your engine grounds? Also, it seems more like a Multiplexer issue with the gauges malfunctioning.
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Old Sep 7, 2015 | 06:48 PM
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Default Re: Help! Replaced Alternator, Car won't start.

Originally Posted by toyomatt84
How about your engine grounds? Also, it seems more like a Multiplexer issue with the gauges malfunctioning.
Funny you mention that. Went back out there, my ground on the negative was loose. Tightened that up, car starts, but I still have that charging light on? Did I get a bad re-manufactured one...?

Time to get a multi-meter or bring it to the shop, ugh.
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Old Sep 7, 2015 | 07:19 PM
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Default Re: Help! Replaced Alternator, Car won't start.

Originally Posted by kaivorth
Funny you mention that. Went back out there, my ground on the negative was loose. Tightened that up, car starts, but I still have that charging light on? Did I get a bad re-manufactured one...?

Time to get a multi-meter or bring it to the shop, ugh.
Try cleaning your battery terminals?
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Old Sep 7, 2015 | 07:24 PM
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Default Re: Help! Replaced Alternator, Car won't start.

Originally Posted by toyomatt84
Try cleaning your battery terminals?
No crud on the negative, new terminal and wiring. I might try cleaning the positive though.
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Old Sep 9, 2015 | 09:39 AM
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Default Re: Help! Replaced Alternator, Car won't start.

Try to inspect the connector that goes on the alternator for wire damage and for the connecto it self.
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Old Sep 11, 2015 | 02:56 PM
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Default Re: Help! Replaced Alternator, Car won't start.

Have you had the battery checked out? May be why your alternator cramped out. Its happened to me.

I had the alt fixed, then the battery stopped working, replaced it and it still wouldn't charge. The battery took out the alt again. Turns out the battery was bad from the beginning. Had to replace alternator. Now it works great.
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Old Sep 13, 2015 | 09:17 AM
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kaivorth's Avatar
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Default Re: Help! Replaced Alternator, Car won't start.

I feel like an idiot. The Negative Terminal on my battery wasn't tight of all things. Tightened it down, started her up, and my charge light was still on. I had blown the alternator fuse from not having my negative terminal connected when I first tried to start it. Diagnosed with the help of a mechanic at this point ugh. Replaced the fuse and all is good.
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