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2005 ford five hundred. The car will just shut down all

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lights except headlights and it...
2005 ford five hundred. The car will just shut down all lights except headlights and it will still run. It's acting like bad alternator. But the alternate is putting our 14.2 at idle.when this issue happens every accessory shuts down except headlights
and the engine. And now the dash shows check engine and reactions control and abs lights.
Submitted: 2 years ago.Category: Ford
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Answered in 2 hours by:
12/12/2015
Ford Mechanic: Mike S., ASE Certified Technician replied 2 years ago
Mike S.
Mike S., ASE Certified Technician
Category: Ford
Satisfied Customers: 7,772
Experience: ASE Certified Master Technician
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A faulty alternator would affect everything electrical while the engine is running. This doesn't sound like an alternator problem.

There are a few fuses I want you to check for voltage when this problem is occurring, the fuse #29 and fuse #34 in the battery junction block, under the hood.

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Ford Mechanic: Mike S., ASE Certified Technician replied 2 years ago

Also fuse #1, in the same block.

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Customer reply replied 2 years ago
Last night the car wouldn't start and I jumped it but I didn't even have the other vehicle running I just connected battery to battery and started it and the alternator was putting out 14.4 V it ran for about 20 minutes and then it just died and once it died I check the battery again and it had 11 V and the minute you crank it would drop to seven or 6 V
Ford Mechanic: Mike S., ASE Certified Technician replied 2 years ago

You are going to have to charge that battery overnite at 4 amps.

Did you check for voltage at those fuses?

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Customer reply replied 2 years ago
The battery is old so I will not likely replace anyway.
Ford Mechanic: Mike S., ASE Certified Technician replied 2 years ago

likely or not likely cause you said not likely.

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Customer reply replied 2 years ago
Oh sorry, I will replace it as it is old anyway.
Ford Mechanic: Mike S., ASE Certified Technician replied 2 years ago

I would charge it and then take it in and have it load tested before buying a new one.

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Customer reply replied 2 years ago
All fuses good. New battery as well. When I first fired up the car the alternator was putting out 12 ish volts. It rose o 14.4 in 20 sec or so. Does that mean anything? Does that car have a decoupling pulley on the alternator?
Ford Mechanic: Mike S., ASE Certified Technician replied 2 years ago

I have a Diesel engine and the charging system on it puts out only 12 volts at idle after first starting it up than after about 50 seconds or so, the idle kicks up and the alternator starts putting out the normal 14 volts. I was told this is because the glow plugs take up that voltage until they turn off.

That leads me to ask, is this a diesel?

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Ford Mechanic: Mike S., ASE Certified Technician replied 2 years ago

I don't read that it has a decoupling pulley.

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Customer reply replied 2 years ago
A ford Five hundred with a diesel?
Customer reply replied 2 years ago
It does not appear that you are familiar with the vehicle in question. I would like my question relisted.
Ford Mechanic: Mike S., ASE Certified Technician replied 2 years ago

It's impossible to remember what every single year, make and model has in it, but I will relist it.

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Ford Mechanic: Mike S., ASE Certified Technician replied 2 years ago

Actually, you have to relist it.

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Customer reply replied 2 years ago
Maybe you wouldn't remember the size of the engine, but a "Ford Mechanic" would know that ford does not make a fullsize diesel (or any other diesel) car in years.
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