Changed alternator and battery. Now have problems - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

ciGARRETTsRbad4u · 08-03-2008, 08:12 PM

First of all, my car is a '90 240 with a '97 '98 twin cam if that makes a difference.
My alternator went bad so I switched it out along with the battery at the same time.
When I started my car, I noticed the battery light in the gauge cluster was on, which was not on before when the alt. was bad.
I believe the alternator to be good because the car will run with the battery disconected. When I rev it up a little, the battery light will flicker on and off.

Not sure if this is related, but when I started the car, I also noticed a kind of buzzing sound from under the dash which was caused by this plug under the driver side kick pannel. When I disconnect it, the sound stops.
(sorry for the sideways pic)

When I disconnect the alternator from here

the 'buzzing' sound and the battery light will turn off.

Any ideas? Any help would be greatly appreciated. Thanks

Kriskouki · 08-04-2008, 04:13 AM

Spray clean the plug at the Alternator........

bo2o · 08-04-2008, 05:49 AM

try another altenator?

mifesto · 08-04-2008, 06:53 AM

im not gonna pretent to know exact what that plug is, but buzzing noise is often from dirty/poor connection

los_inc · 08-04-2008, 07:44 AM

your car has poor grounds
make sure everything is grounded to the body
the battery, the alt & the motor all to the chassis
i've had the same issue
-los

Read This

Okinawandrifter87 · 08-04-2008, 10:04 AM

If you further isolate where the buzzing is originating let us know as it might help to give you more help in what direction to pursue. To me a "buzzing" sound leans towards a relay being toggled or something shorting out and arcing but that's unlikely because more than likely with an errant ground you'd have more problems that what you're having now. Good luck!

08-03-2008, 08:12 PM	#1
ciGARRETTsRbad4u Zilvia Member Join Date: Oct 2003 Location: California Posts: 166 Trader Rating: (1) Feedback Score: 1 reviews	Changed alternator and battery. Now have problems First of all, my car is a '90 240 with a '97 '98 twin cam if that makes a difference. My alternator went bad so I switched it out along with the battery at the same time. When I started my car, I noticed the battery light in the gauge cluster was on, which was not on before when the alt. was bad. I believe the alternator to be good because the car will run with the battery disconected. When I rev it up a little, the battery light will flicker on and off. Not sure if this is related, but when I started the car, I also noticed a kind of buzzing sound from under the dash which was caused by this plug under the driver side kick pannel. When I disconnect it, the sound stops. (sorry for the sideways pic) When I disconnect the alternator from here the 'buzzing' sound and the battery light will turn off. Any ideas? Any help would be greatly appreciated. Thanks

08-04-2008, 05:49 AM	#3
bo2o Zilvia FREAK! Join Date: May 2006 Location: 626 socal! Posts: 1,315 Trader Rating: (7) Feedback Score: 7 reviews	try another altenator? __________________ fS! *vlsd ! slim fans ! hid kits ! lug nuts !* http://www.zilvia.net/f/search.php?d...earchuser=bo2o ^^^click^^^

08-04-2008, 07:44 AM	#5
los_inc Zilvia Addict Join Date: Apr 2006 Location: New Joisey Bro. Age: 40 Posts: 826 Trader Rating: (15) Feedback Score: 15 reviews	your car has poor grounds make sure everything is grounded to the body the battery, the alt & the motor all to the chassis i've had the same issue -los Read This __________________

08-04-2008, 10:04 AM	#6
Okinawandrifter87 Post Whore! Join Date: Jun 2006 Location: Sacramento, CA Posts: 3,959 Trader Rating: (22) Feedback Score: 22 reviews	If you further isolate where the buzzing is originating let us know as it might help to give you more help in what direction to pursue. To me a "buzzing" sound leans towards a relay being toggled or something shorting out and arcing but that's unlikely because more than likely with an errant ground you'd have more problems that what you're having now. Good luck! __________________ Driftphreak87

08-04-2008, 04:13 AM	#2
Kriskouki Banned from the Marketplace Join Date: Oct 2006 Location: Oregon Posts: 4,396 Trader Rating: (199) Feedback Score: 199 reviews	Spray clean the plug at the Alternator........

08-04-2008, 06:53 AM	#4
mifesto Zilvia Member Join Date: Jul 2007 Location: NJ Posts: 209 Trader Rating: (2) Feedback Score: 2 reviews	im not gonna pretent to know exact what that plug is, but buzzing noise is often from dirty/poor connection