plz help me wit my s14 - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

luiss14 · 05-30-2013, 08:16 AM

so im having charging issues my batt light is on. the car is running off my battery i have a read top optima i have tested the alt and its reads 13v correct me if im wrong but isn't it suppose to be sending out 14v?? if so with that one volt lost could that be my issue my battery is in my trunk... plz help idk what else to do

olskoolgamr · 05-31-2013, 09:39 PM

Charging voltage should be around 13.8 to 14.8 volts. Any lower send the alternator to autozone to get tested for free, check ur draw on the charging system wires as well draw should be no more than .02 for each wire.

*fliprayzin240sx* · 06-01-2013, 11:24 AM

What voltage are you seeing at the battery with the car running?

luiss14 · 06-01-2013, 02:48 PM

It's staying steady around 11.50 don't kno it's data cuz it's a strong batt I l didn't really see a draw

Quote:

Originally Posted by fliprayzin240sx

What voltage are you seeing at the battery with the car running?

Kingtal0n · 06-01-2013, 03:31 PM

Optima is one of those batteries that even when dead will put out good voltage. You need to check if the alternator is good, because that is usually what triggers the light on the dash. With the engine running, the voltage at the battery should significantly be higher than it is when the engine is not running. If you detect (via voltmeter) that there is no change when the engine is running, the alternator is either bad, or connected incorrectly.

Sileighty_85 · 06-01-2013, 11:06 PM

Quote:

Originally Posted by luiss14

It's staying steady around 11.50 don't kno it's data cuz it's a strong batt I l didn't really see a draw

If you properly tested the alt and your getting 13+ volts your alt should be fine.

however if you are getting 11.50 at the battery while its running then you have an issue between the alt and battery.

you can also do the ghetto alt check my disconnecting the NEG battery cable while the engine is running and if it stays running then the alt is fine.

Of course some ppl with flail thier arms saying ooohhh youll short the diode in the alt by doing that... it kinda depend on design for that but Ive done it to 40+ times and never had an issue.

EsChassisLove · 06-01-2013, 11:13 PM

What gauge wire are you using?

05-30-2013, 08:16 AM	#1
luiss14 Leaky Injector Join Date: Apr 2013 Location: hartford ct Age: 31 Posts: 84 Trader Rating: (1) Feedback Score: 1 reviews	plz help me wit my s14 so im having charging issues my batt light is on. the car is running off my battery i have a read top optima i have tested the alt and its reads 13v correct me if im wrong but isn't it suppose to be sending out 14v?? if so with that one volt lost could that be my issue my battery is in my trunk... plz help idk what else to do __________________ Where Dey Do Dat At

05-31-2013, 09:39 PM	#2
olskoolgamr Leaky Injector Join Date: Dec 2008 Location: Long Beach Age: 34 Posts: 94 Trader Rating: (1) Feedback Score: 1 reviews	Charging voltage should be around 13.8 to 14.8 volts. Any lower send the alternator to autozone to get tested for free, check ur draw on the charging system wires as well draw should be no more than .02 for each wire. __________________ -GSpeed4ever-

06-01-2013, 11:24 AM	#3
fliprayzin240sx Man w/ CTSV & a Car Seat Join Date: Aug 2002 Location: Tampa Posts: 17,998 Trader Rating: (19) Rides Gallery: fliprayzin240sx Feedback Score: 19 reviews	What voltage are you seeing at the battery with the car running? __________________ If you think Zilvia has too many assholes... CLICK HERE!!!

06-01-2013, 03:31 PM	#5
Kingtal0n Post Whore! Join Date: Jul 2005 Location: South Florida Age: 38 Posts: 4,649 Trader Rating: (17) Feedback Score: 17 reviews	Optima is one of those batteries that even when dead will put out good voltage. You need to check if the alternator is good, because that is usually what triggers the light on the dash. With the engine running, the voltage at the battery should significantly be higher than it is when the engine is not running. If you detect (via voltmeter) that there is no change when the engine is running, the alternator is either bad, or connected incorrectly. __________________ 5.3/4l80e/turbo 240sx playthrough: https://tinyurl.com/turbo240

06-01-2013, 11:13 PM	#7
EsChassisLove Nissanaholic! Join Date: Jan 2011 Location: San Diego Age: 32 Posts: 2,090 Trader Rating: (26) Feedback Score: 26 reviews	What gauge wire are you using? __________________ IG/TikTok-ThatS14_Z06guy

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