Lights get brighter at high RPMs

Post by **zachattack_5491** » Wed Dec 03, 2008 5:14 pm

When I first start my car at night and flip on the lights, all of the dash lights are very dim, and same with the headlights. When I rev the engine up to about 4000rpms everything instantly gets to 100% brightness and they stay like that until I turn my car off. Could this be the alternator?

Post by **foress_89** » Wed Dec 03, 2008 5:59 pm

I would say it's your alternator, have it checked.

Post by **Koshin** » Wed Dec 03, 2008 7:01 pm

foress_89 wrote:I would say it's your alternator, have it checked.

yes

Post by **lancet913** » Thu Dec 04, 2008 5:54 am

dude you are cracking me up!!!

I need to change my oil......240Runner's answer "you should just sell your car"

Post by **xekushnr** » Thu Dec 04, 2008 7:41 am

Test your voltage regulator as well.

Post by **zachattack_5491** » Thu Dec 04, 2008 5:10 pm

Alright, I'll go get it checked. I just wanted a second opinion before I went through the hassle of getting it checked. I don't know where my voltage regulator is or how to check it but I guess that's why I have an FSM Thanks guys

Post by **ddgsxr504** » Thu Dec 04, 2008 8:15 pm

Voltage regulator is toast, get a new alternator.

Post by **SullivanRacing06** » Fri Dec 05, 2008 4:36 am

sounds lie your voltage regulator is fried or your entire alt assembly is shot, go get it tested n youl end up buyin a new one

Post by **biggishjay** » Fri Dec 05, 2008 8:03 am

my civic does the same thing...its the alt

Post by **zachattack_5491** » Sat Dec 06, 2008 12:44 pm

How detrimental would this be to performance? If I drove it around like this for a while would it **** up anything? My local shop has to order my alternator so it's going to be a little while.I think I might just go with the '97 Quest alternator. It costs about $75 more but I think it would be worth it. Any opinions on that?

Post by **zachattack_5491** » Wed Dec 10, 2008 4:24 pm

Yupp so I put my new quest alternator in. It still does the same thing. Now they just get brighter at like 2500 RPMs.

Post by **xekushnr** » Wed Dec 10, 2008 6:44 pm

Well, that's why we told you that it was probably the voltage regulator (at least the people who's knowledge I can vouch for) and to get your alt TESTED. Go replace your voltage regulator.

Post by **zachattack_5491** » Wed Dec 10, 2008 7:35 pm

xekushnr wrote:Well, that's why we told you that it was probably the voltage regulator (at least the people who's knowledge I can vouch for) and to get your alt TESTED. Go replace your voltage regulator.

The voltage regulator is part of the alternator. The alternator was replaced, therefore so was the voltage regulator.

Edit... or at least that's what all the info I've found says. And my alternator was failing anyways. I got it tested, it failed so I bought a new one.

Post by **xekushnr** » Wed Dec 10, 2008 10:55 pm

I guess I missed that post where you said you replaced it. I usually overhaul them so thats why I said you should replace the regulator. I should have paid more attention. Still, I would reccommend that you test the regulator on the new alty to be sure and even do a regulator bypass test and compare your readings to specs.

Lights get brighter at high RPMs

Lights get brighter at high RPMs

Re: Lights get brighter at high RPMs (zachattack_5491)

Re: Lights get brighter at high RPMs (foress_89)

Re: Lights get brighter at high RPMs (240Runner)

Re: Lights get brighter at high RPMs (zachattack_5491)

Re: Lights get brighter at high RPMs (zachattack_5491)

Re: Lights get brighter at high RPMs (zachattack_5491)

Re: Lights get brighter at high RPMs (zachattack_5491)

Re: Lights get brighter at high RPMs (zachattack_5491)

Re: (xekushnr)

Nissan Forums

Infiniti Forums

Datsun Forums

Technical Forums

Classifieds / Marketplace

Nissan Motorsports

General Forums