dash lights go bright then dim

[razey]

Hey guys,

I recently replaced my alternator with a brand new one. When i turn on my car now, my dash lights and headlights get dim then bright also my fuel pump sounds loud then soft. I went through and checked my nuts and bolts on the alternator. What do you all think the problem could be?

Thanks,
Steve

 

[TofastForU_99]

does the belt squeak at all?

 

[chico904]

Did you get the correct size alternator?

 

[99GST83]

double check all of your grounds. Especially the ones on the battery where corrosion can build up and prevent a good connection. If the problem still continues, you might want to take the alternator to autozone or some other parts store and have them put it on a tester to check the voltage regulator in the alternator.

 

[Defiant]

Or, your new alternator is crap.

 

[razey]

Hey guys,

I went out and checked all my grounds on the alternator and the battery, they are all very tight with no corrosion, i guess i need to take out the alternator and bring it back to where i got it from and have them check it. Also i got the correct size alternator and my belts don't squeak at all. This only happens when i first turn on the car, after i put it in drive and and go around the block for a minute, everything works perfectly fine. if i turn the car off then back on everything works fine. Does my alternator need time to break in or something?

 

[Defiant]

Have you put a voltmeter on it and tested its output?

 

[razey]

I haven't tested the voltage yet, i will gram a multimeter tomorrow from work and check it. Just another question, having the alternator tensioner to tight cause this problem?

 

[Defiant]

No..