Electrical Issues (maybe alternator) - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

caall99 · 05-29-2006, 03:07 PM

So today i leave school to go home and see that my brake light is flickering even when i am not touching the brake pedal. Also i hear an odd buzzing noise everytime i hit the brake coming from the bottom left of the dash, close to the fuse panel, but above it. The car also begins to idle slightly rougher than usual. Now i notice that a yellow dummy light in my cluster is coming on evertime i hit the brake pedal, including the battery voltage warning light and the brake light, but all of them are oddly flickering. I check the voltage at my battery and it reads 12.1 to 12.3 volts with the car running. I checked/cleaned all my grounds. I need to get home and i have run out of ideas besides removing the alternator and getting it tested. Any relay or fuse i should be looking at? what else could be the problem?

Thanks

SoSideways · 05-29-2006, 04:36 PM

Sounds like your alternator or battery is on its way out.

With the car running your battery should read around 14v, not 12v.

caall99 · 05-30-2006, 01:01 AM

turns out it was the alternator. i replaced it with a ka24de alternator. I swapped the pullies ground away some of the excess metal and bored out the top mounting hole. the battery now reads 4.2 volts.

SoSideways · 05-30-2006, 12:58 PM

4.2v?

Or 14.2v?

4.2v = only your clock in the gauge cluster will work (what's happening with my car)

caall99 · 05-30-2006, 07:11 PM

oops, correction: 14.2 volts. the alternator seems to come on irregularily tho, which is kind of odd, what else could be going on? maybe something else on my car?

05-29-2006, 03:07 PM	#1
caall99 Zilvia Member Join Date: Apr 2005 Location: Wellesley, MA Age: 40 Posts: 267 Trader Rating: (0) Feedback Score: 0 reviews	Electrical Issues (maybe alternator) So today i leave school to go home and see that my brake light is flickering even when i am not touching the brake pedal. Also i hear an odd buzzing noise everytime i hit the brake coming from the bottom left of the dash, close to the fuse panel, but above it. The car also begins to idle slightly rougher than usual. Now i notice that a yellow dummy light in my cluster is coming on evertime i hit the brake pedal, including the battery voltage warning light and the brake light, but all of them are oddly flickering. I check the voltage at my battery and it reads 12.1 to 12.3 volts with the car running. I checked/cleaned all my grounds. I need to get home and i have run out of ideas besides removing the alternator and getting it tested. Any relay or fuse i should be looking at? what else could be the problem? Thanks __________________ Signature over limits http://www.zilvia.net/f/showthread.php?t=21036

05-30-2006, 01:01 AM	#3
caall99 Zilvia Member Join Date: Apr 2005 Location: Wellesley, MA Age: 40 Posts: 267 Trader Rating: (0) Feedback Score: 0 reviews	turns out it was the alternator. i replaced it with a ka24de alternator. I swapped the pullies ground away some of the excess metal and bored out the top mounting hole. the battery now reads 4.2 volts. __________________ Signature over limits http://www.zilvia.net/f/showthread.php?t=21036

05-30-2006, 07:11 PM	#5
caall99 Zilvia Member Join Date: Apr 2005 Location: Wellesley, MA Age: 40 Posts: 267 Trader Rating: (0) Feedback Score: 0 reviews	oops, correction: 14.2 volts. the alternator seems to come on irregularily tho, which is kind of odd, what else could be going on? maybe something else on my car? __________________ Signature over limits http://www.zilvia.net/f/showthread.php?t=21036

05-29-2006, 04:36 PM	#2
SoSideways Post Whore! Join Date: Apr 2003 Location: 你老母 Posts: 4,371 Trader Rating: (4) Feedback Score: 4 reviews	Sounds like your alternator or battery is on its way out. With the car running your battery should read around 14v, not 12v.

05-30-2006, 12:58 PM	#4
SoSideways Post Whore! Join Date: Apr 2003 Location: 你老母 Posts: 4,371 Trader Rating: (4) Feedback Score: 4 reviews	4.2v? Or 14.2v? 4.2v = only your clock in the gauge cluster will work (what's happening with my car)