Could it be the voltage regulator?

[Fordfangirl4life]

I have a 2001 expedition, 5.4 Triton, 2we. After replacing the alternator, battery and battery cables, all interior and exterior lights "flicker", for lack of a better word. They rapidly get bright then dim. On absolutely clear nights it's not really an issue, however, I live in north Georgia where absolutely clear nights are not the norm, could it be the voltage regulator?

 

[Yupster Dog]

could it be the voltage regulator?

I would check all the connections first make sure they are tight and properly connected.
You can stop by Auto Zone and they can check your alternator and voltage regulator for free while they are still on the truck.

 

[Motorcity muscle]

Check the grounds, negative to block and inner fender.

 

[Hamfisted]

What brand alternator did you use, and what amperage ? Did this fluctuation start just after the new alternator install ?

 

[Fordfangirl4life]

Bosch alternator 130 amp. And yes, immediately after the installation. All connections are secure,

 

[Hamfisted]

Bosch alternator 130 amp. And yes, immediately after the installation. All connections are secure,

Was it a local purchase, where you can easily exchange it ? Or have that store do a test on the alternator while it's in the truck?
But yeah, I would suspect the alternator too....

 

[Dennis_H]

Can you monitor the voltage output when it's running? See what it reads from odb port. I had replaced one in an escape this year and it was bad and overcharged. Would shut down dash and other problems. That one you have to remove axle and motor mount to change. Will only do new Motorcraft in that vehicle. Expy is a piece of cake, so with the risk for reman.

 

[knewblewkorvett]

Yes, letting us know what you are getting for voltage would help a lot in determining what your problem is.

 

[Fordfangirl4life]

Get it asap

 

[GAINMOB]

arent the voltage regs internal on stock and replacement alts? i had the option and got internal reg for my 370 alt