When accelerating all dash lights turn on and alternator overcharges

Tiny
HILTON_GARCIA
  • MEMBER
  • 2003 FORD CROWN VICTORIA
  • 4.6L
  • V8
  • 2WD
  • AUTOMATIC
  • 91,000 MILES
My car runs smooth, but when try to speed, all light is dash turns on, the alternator starts to overcharge. When I change to neutral, it stops and goes back to normal. Went to AutoZone and the code was about a gas pressure sensor that has nothing to do with electric. Thinking about changing the alternator, but might be something different. Please advise
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Wednesday, August 12th, 2020 AT 6:24 AM

1 Reply

Tiny
JACOBANDNICKOLAS
  • EXPERT
Hi,

The only thing that regulates voltage is the regulator and it is internal. Since it is overcharging, chances are that is the problem. Based on your description, it sounds like it needs replaced.

If you want to check alternator output, here is a link that explains how it's done. You could check it at idle and when revving the engine to confirm it is overcharging.

https://www.2carpros.com/articles/how-to-check-a-car-alternator

Here is a link that explains in general how one is replaced:

https://www.2carpros.com/articles/how-to-replace-an-alternator

Here are the directions specific to your vehicle. The attached pictures correlate with the directions.

Before starting, make sure the battery is disconnected.
_______________________________________________

2003 Ford Crown Victoria V8-4.6L CNG SOHC VIN 9
Procedures
Vehicle Starting and Charging Charging System Alternator Service and Repair Procedures
PROCEDURES
REMOVAL
1. Disconnect the battery.

pic 1

2. Remove the screws and the engine cover.

pic 2

3. Loosen the clamp and remove the intake induction resonator.
4. Release the tension and remove the accessory drive belt from the generator pulley.

pic 3

5. Remove the nut and disconnect the generator electrical connectors.
Position the cover aside.

pic 4

6. Remove the bolts and the generator bracket.

pic 5

7. Loosen the bolts and remove the generator.

INSTALLATION
1. To install, reverse the removal procedure.

____________________________

Let me know if this helps or if you have other questions.

Take care,
Joe
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Wednesday, August 12th, 2020 AT 9:05 PM

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