Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Go Back   Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum > General > Tech Talk > Engine Tech

Engine Tech Technical discussion related to all relevant engines such as KA, SR, RB, CA, 2JZ , L24/26/28, VG, VQ, and LSx series.


Reply
 
Thread Tools Display Modes
Old 07-01-2020, 08:51 PM   #1
240codyluukk13
 
Join Date: May 2020
Location: New york
Age: 22
Posts: 11
Trader Rating: (0)
240codyluukk13 is an unknown quantity at this point
Feedback Score: 0 reviews
Question Alternator Wont Charge Battery

Was hoping somebody could give some advice on a problem.
I got a stock ka24e with a brand new alternator and battery, both were tested. for some reason the alternator doesn't charge the battery. I checked the grounds coming from the back of the alternator and tried to ground the alternator casing to the negative terminal on the battery. I also cleaned the mounting bracket and the block were it bolts hoping for a better ground.

I read on another thread that the white/red wire behind the cluster could cause an issue but after I noticed that the battery light on the cluster would turn on and off quick when I turned the key from accessory to the on position and same thing when the key is turned backwards. When it is in the on position the light stays off. I never had this problem with the light before so I think that has something to do with it.
The previous owner had an alarm system that was clearly rigged together that I had taken out. I think a wire may be shorting on something.

If anyone has any advice/pictures on the wiring under the ignition I would greatly appreciate it, thanks!
240codyluukk13 is offline   Reply With Quote
Sponsored Links
Old 07-02-2020, 04:37 AM   #2
S14rebuild
BANNED
 
Join Date: May 2019
Location: Florida-FAIL
Posts: 2,497
Trader Rating: (8)
S14rebuild S14rebuild S14rebuild S14rebuild S14rebuild S14rebuild S14rebuild S14rebuild S14rebuild S14rebuild S14rebuild
Feedback Score: 8 reviews
First check the voltage coming off of the alternator stud. What do u get?
S14rebuild is offline   Reply With Quote
Old 07-02-2020, 04:56 PM   #3
240codyluukk13
 
Join Date: May 2020
Location: New york
Age: 22
Posts: 11
Trader Rating: (0)
240codyluukk13 is an unknown quantity at this point
Feedback Score: 0 reviews
I got a reading of .013 with the meter connected to the positive on the battery and negative on alternator stud.
240codyluukk13 is offline   Reply With Quote
Old 07-02-2020, 04:58 PM   #4
FaLKoN240
Super Moderator
 
FaLKoN240's Avatar
 
Join Date: Jun 2004
Location: SF Bay Area
Posts: 16,761
Trader Rating: (73)
FaLKoN240 is close to perfectionFaLKoN240 is close to perfectionFaLKoN240 is close to perfectionFaLKoN240 is close to perfectionFaLKoN240 is close to perfectionFaLKoN240 is close to perfectionFaLKoN240 is close to perfectionFaLKoN240 is close to perfectionFaLKoN240 is close to perfectionFaLKoN240 is close to perfectionFaLKoN240 is close to perfection
Feedback Score: 73 reviews
That doesn't sound right at all .013 Volts???
__________________

Best way to do business with me? Make your best offer FIRST.
FaLKoN240 is offline   Reply With Quote
Old 07-02-2020, 05:28 PM   #5
240codyluukk13
 
Join Date: May 2020
Location: New york
Age: 22
Posts: 11
Trader Rating: (0)
240codyluukk13 is an unknown quantity at this point
Feedback Score: 0 reviews
Yeah definitely not. Gonna trace the wire back and see if there?s anything wrong with it.
240codyluukk13 is offline   Reply With Quote
Old 07-02-2020, 05:41 PM   #6
S14rebuild
BANNED
 
Join Date: May 2019
Location: Florida-FAIL
Posts: 2,497
Trader Rating: (8)
S14rebuild S14rebuild S14rebuild S14rebuild S14rebuild S14rebuild S14rebuild S14rebuild S14rebuild S14rebuild S14rebuild
Feedback Score: 8 reviews
Multimeter set to dc.. red lead from multimeter to + stud on alternator...black lead from multimeter to battery negative...

Whats the reading?
S14rebuild is offline   Reply With Quote
Old 07-03-2020, 09:00 AM   #7
240codyluukk13
 
Join Date: May 2020
Location: New york
Age: 22
Posts: 11
Trader Rating: (0)
240codyluukk13 is an unknown quantity at this point
Feedback Score: 0 reviews
ok I will check later today. I also heard of someone wiring the stud on the alternator straight to the cluster because of the battery light issue. I was thinking thats where my issue might be. Any thoughts on this?
240codyluukk13 is offline   Reply With Quote
Old 07-03-2020, 11:09 AM   #8
S14rebuild
BANNED
 
Join Date: May 2019
Location: Florida-FAIL
Posts: 2,497
Trader Rating: (8)
S14rebuild S14rebuild S14rebuild S14rebuild S14rebuild S14rebuild S14rebuild S14rebuild S14rebuild S14rebuild S14rebuild
Feedback Score: 8 reviews
Quote:
Originally Posted by 240codyluukk13 View Post
ok I will check later today. I also heard of someone wiring the stud on the alternator straight to the cluster because of the battery light issue. I was thinking thats where my issue might be. Any thoughts on this?

Lets acually find whats wrong with ur car before you start ghetto wiring stuff....

But the choice is urs..ur car
S14rebuild is offline   Reply With Quote
Old 07-04-2020, 10:29 AM   #9
240codyluukk13
 
Join Date: May 2020
Location: New york
Age: 22
Posts: 11
Trader Rating: (0)
240codyluukk13 is an unknown quantity at this point
Feedback Score: 0 reviews
So I tested the stud on the alternator and got a reading of 11.6 volts.
240codyluukk13 is offline   Reply With Quote
Old 07-04-2020, 11:14 AM   #10
S14rebuild
BANNED
 
Join Date: May 2019
Location: Florida-FAIL
Posts: 2,497
Trader Rating: (8)
S14rebuild S14rebuild S14rebuild S14rebuild S14rebuild S14rebuild S14rebuild S14rebuild S14rebuild S14rebuild S14rebuild
Feedback Score: 8 reviews
Okay, next check the 2 pin connector... show be white wire and a white with red tracer.

White wire should have 12v power constant

White w red tracer should have 12volt power key/ running.

Check those.


Heres a link to the fsm. I found the alternator wiring in it for you to check.
http://tech.240sxone.com/fsm/
S14rebuild is offline   Reply With Quote
Old 07-04-2020, 12:24 PM   #11
240codyluukk13
 
Join Date: May 2020
Location: New york
Age: 22
Posts: 11
Trader Rating: (0)
240codyluukk13 is an unknown quantity at this point
Feedback Score: 0 reviews
So the white/red wire Had less then a volt running and the white had 12.7 so I?m thinking it?s definitely gotta the the white/red wire.
240codyluukk13 is offline   Reply With Quote
Old 07-04-2020, 12:34 PM   #12
S14rebuild
BANNED
 
Join Date: May 2019
Location: Florida-FAIL
Posts: 2,497
Trader Rating: (8)
S14rebuild S14rebuild S14rebuild S14rebuild S14rebuild S14rebuild S14rebuild S14rebuild S14rebuild S14rebuild S14rebuild
Feedback Score: 8 reviews
Correct..that wire is the trigger wire..pull up the fsm ull see that goes to the bulb in the cluster.

If u supply volts to that wire the alt will turn on and start charging
S14rebuild is offline   Reply With Quote
Old 07-04-2020, 01:09 PM   #13
240codyluukk13
 
Join Date: May 2020
Location: New york
Age: 22
Posts: 11
Trader Rating: (0)
240codyluukk13 is an unknown quantity at this point
Feedback Score: 0 reviews
Ok so I wired it from the alt to the cluster just to see if it worked and the alternator started working and charging right.
240codyluukk13 is offline   Reply With Quote
Old 07-04-2020, 01:27 PM   #14
S14rebuild
BANNED
 
Join Date: May 2019
Location: Florida-FAIL
Posts: 2,497
Trader Rating: (8)
S14rebuild S14rebuild S14rebuild S14rebuild S14rebuild S14rebuild S14rebuild S14rebuild S14rebuild S14rebuild S14rebuild
Feedback Score: 8 reviews
U can just wire it to a 12volt pos key on and it will work aswell, no need to run a crqzy long wire
S14rebuild is offline   Reply With Quote
Old 07-05-2020, 08:47 AM   #15
240codyluukk13
 
Join Date: May 2020
Location: New york
Age: 22
Posts: 11
Trader Rating: (0)
240codyluukk13 is an unknown quantity at this point
Feedback Score: 0 reviews
so I have the alternator charging and everything works but I still have the battery light turning on and off when I put it in the on position. I tried switching out the bulb and still the same problem. Any thoughts on what this could be?
240codyluukk13 is offline   Reply With Quote
Old 07-05-2020, 08:53 AM   #16
S14rebuild
BANNED
 
Join Date: May 2019
Location: Florida-FAIL
Posts: 2,497
Trader Rating: (8)
S14rebuild S14rebuild S14rebuild S14rebuild S14rebuild S14rebuild S14rebuild S14rebuild S14rebuild S14rebuild S14rebuild
Feedback Score: 8 reviews
Put what in the "on" position?
S14rebuild is offline   Reply With Quote
Old 07-05-2020, 11:35 AM   #17
240codyluukk13
 
Join Date: May 2020
Location: New york
Age: 22
Posts: 11
Trader Rating: (0)
240codyluukk13 is an unknown quantity at this point
Feedback Score: 0 reviews
Sorry I meant when the key is in the on position all the dash lights turn on except my oil and battery light. The battery light will blink once and then shuts off the others stay on
240codyluukk13 is offline   Reply With Quote
Old 07-05-2020, 01:02 PM   #18
S14rebuild
BANNED
 
Join Date: May 2019
Location: Florida-FAIL
Posts: 2,497
Trader Rating: (8)
S14rebuild S14rebuild S14rebuild S14rebuild S14rebuild S14rebuild S14rebuild S14rebuild S14rebuild S14rebuild S14rebuild
Feedback Score: 8 reviews
Sounds like a cluster issue.

Once the car is running, the light should stay off. Then while running disconnect the alt power wire, the battery light should come on...thats how normal operation works
S14rebuild is offline   Reply With Quote
Old 07-05-2020, 01:02 PM   #19
S14rebuild
BANNED
 
Join Date: May 2019
Location: Florida-FAIL
Posts: 2,497
Trader Rating: (8)
S14rebuild S14rebuild S14rebuild S14rebuild S14rebuild S14rebuild S14rebuild S14rebuild S14rebuild S14rebuild S14rebuild
Feedback Score: 8 reviews
If anything reffer to the wiring diagram link i posted
S14rebuild is offline   Reply With Quote
Old 07-05-2020, 01:27 PM   #20
240codyluukk13
 
Join Date: May 2020
Location: New york
Age: 22
Posts: 11
Trader Rating: (0)
240codyluukk13 is an unknown quantity at this point
Feedback Score: 0 reviews
Ok thanks a lot for the help I appreciate it👍👍
240codyluukk13 is offline   Reply With Quote
Reply

Bookmarks

Tags
alternator not charging, cluster lights, electrcial, ka24e engine


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -6. The time now is 03:17 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, vBulletin Solutions Inc.
vB.Sponsors
Copyright © 1998 - 2019, Zilvia.net™