Topic: ***help*** Alt not charging the battery (Read 9512 times)

junkyard racer · « **on:** May 30, 2009, 10:27:39 AM »

My car is not charging. New battery, new Alt. it is charging at 12.8 and needs to be around 13-5ish. All of the grounds appear to be good (they are tight) everything is connected.

Any thoughts.

2000 integra. LS

Kain · « **Reply #1 on:** May 30, 2009, 11:02:16 AM »

does the voltage go up when you rev it?

darkelvis · « **Reply #2 on:** May 30, 2009, 11:27:35 AM »

voltage drop all of your starting/charging wiring..check if you have a bad wire.

crxvtec91 · « **Reply #3 on:** May 30, 2009, 11:46:23 AM »

Test the voltage at the alt it self. if it is a t 13+v then the wire that goes from it to the battery burnt up a bit.

highroller54 · « **Reply #4 on:** May 30, 2009, 11:50:10 AM »

have battery power at the big power wire with the car off?

junkyard racer · « **Reply #5 on:** May 30, 2009, 12:42:22 PM »

Thanks for all of the help. I'm stuck in Wytheville, Va at a super8 trying to drive to Indiana.

I will try all of this stuff when I get home. I've got my brother driving down from Indiana with a trailer. I don't have a multimeter, and advance auto down the road has helped as much as they can. I guess I could buy a multimeter, but I'm limited here at the motel with what little tools I have. Sucks so bad.

BTW, I got out of the Marine Corps yesterday.

Quote from: Kain on May 30, 2009, 11:02:16 AM

does the voltage go up when you rev it?

No. It stays steady

Quote from: highroller54 on May 30, 2009, 11:50:10 AM

have battery power at the big power wire with the car off?

Quote from: crxvtec91 on May 30, 2009, 11:46:23 AM

Test the voltage at the alt it self. if it is a t 13+v then the wire that goes from it to the battery burnt up a bit.

Didnt check that. I dont have a multimeter.

***Move this to the tech***

highroller54 · « **Reply #6 on:** May 30, 2009, 02:00:28 PM »

even a cheap ass test light should get this diagnosed. Did you check ALL fuses?

junkyard racer · « **Reply #7 on:** May 30, 2009, 02:02:42 PM »

its charging, just not charging the full voltage

highroller54 · « **Reply #8 on:** May 30, 2009, 06:40:56 PM »

I call 12.8 not charging

junkyard racer · « **Reply #9 on:** May 30, 2009, 06:56:47 PM »

I shoulda said, its working, just not the way it should. I know its not charging. read my first sent. in post #1

dvst8r · « **Reply #10 on:** May 30, 2009, 09:16:14 PM »

Maybe the belt is too loose?

Doug · « **Reply #11 on:** May 30, 2009, 09:23:37 PM »

When I first read the thread title I thought it was another n/a mike post lol

Same thing happened in my EF with new battery and alt tested good. Turned out was a bad ground.

junkyard racer · « **Reply #12 on:** May 30, 2009, 10:31:29 PM »

Quote from: dvst8r on May 30, 2009, 09:16:14 PM

Maybe the belt is too loose?

fairly new belt, and it is tight

Quote from: Doug on May 30, 2009, 09:23:37 PM

When I first read the thread title I thought it was another n/a mike post lol

Same thing happened in my EF with new battery and alt tested good. Turned out was a bad ground.

when I get this thing back home, I plan to do a little testing with the multimeter, and pull the entire harness...check all of the grounds again. my guess, its probably something really simple.

Joseph Davis · « **Reply #13 on:** June 11, 2009, 06:46:34 PM »

BoostForLife · « **Reply #14 on:** June 12, 2009, 01:15:56 PM »

Quote from: junkyard racer on May 30, 2009, 10:31:29 PM

Quote from: dvst8r on May 30, 2009, 09:16:14 PM
Maybe the belt is too loose?

fairly new belt, and it is tight

Belt will squeal at lower RPMs or break and rip, but it would never be the reason why you're having low voltage output.

dvst8r · « **Reply #15 on:** June 23, 2009, 11:44:01 PM »

Fix it?

Joseph Davis · « **Reply #16 on:** June 24, 2009, 01:07:18 AM »

Quote from: Joseph Davis on June 11, 2009, 06:46:34 PM

bump

junkyard racer · « **Reply #17 on:** June 24, 2009, 07:46:03 AM »

Car still sits in my driveway, unattended. Bought a house which is consuming 90% of my time and been busting my ass trying to sling my "I need a job" campaign. The car is pretty much no longer my DD...so I haven't been too worried about getting it resolved. My brother in law is coming over sometime this week with his new super duper swoopy snap-on scan tool thingy and I think it will tell me my problem.

We did get a lot of looks pulling it home though.

Joseph Davis · « **Reply #18 on:** June 24, 2009, 08:01:02 AM »

Scanner is useless for that model car. While there is an AltC pin between the ECU and voltage regulator, it's a dummy option. The regulator will make the alternator charge perfectly if you just power the one blk/yel pin (which is switched power, anyway). If you have switched power on that pin and it doesn't charge then your alternator is infested with gay and you need to give Meredith a little brother or sister to keep that gay from spreading to you, Mr. Pants.

Joseph Davis · « **Reply #19 on:** June 24, 2009, 08:01:23 AM »

Joseph Davis · « **Reply #20 on:** June 24, 2009, 08:57:55 AM »

bump to return heterosexuality to this thread.

junkyard racer · « **Reply #21 on:** June 25, 2009, 07:57:03 AM »

bump for no time. actually, I might find some time today.

Joseph Davis · « **Reply #22 on:** June 25, 2009, 11:06:14 AM »

You have no time for heterosexuality?

sewell94 · « **Reply #23 on:** June 25, 2009, 01:53:16 PM »

Check and make sure the screw/bolt that holds the alt wire is tight in the fuse box.

I had a guy come in with the same issues, alt was good, battery good, battery voltage was steady at 12.5-12.8, turn on lights, fan blower, didn't matter, steady low voltage. It was a loose connection in the fuse box.

junkyard racer · « **Reply #24 on:** July 02, 2009, 09:16:05 PM »

fucked with it tonight. Same shit. Held steady for about a good 30min, lights turned on, turning the car off and on trying to kill the battery...battery stayed steady right at ~11.8....same voltage at the alt. Then all the sudden...it dropped to 9.8-10 and then just died.

My brother in laws super swoopy versus snap-on tester didn't tell us much other than what we already knew. However it did do a test and that test revealed that there was shitty ground between the alt and the battery....however that didnt change when we added a ground to the alt, turning on the lights...adding anything electrical.

It does throw a code... for the ELD, electric load detector...which I think is the alt? My brother in law seems to think the fucking alt is stupid and I should change it. I already did that shit though...and the one thats on the car now tested just as good as the brand new one.

I think swell might be onto something.
Thoughts?

Joseph Davis · « **Reply #25 on:** July 02, 2009, 09:33:54 PM »

The ELD is in the underhood fuse box. All USDM cars have them, and only USDM ECUs look for them.

crxvtec91 · « **Reply #26 on:** July 03, 2009, 12:00:39 AM »

Did you test power out put right at the alt?

sewell94 · « **Reply #27 on:** July 03, 2009, 02:18:01 AM »

Quote from: junkyard racer on July 02, 2009, 09:16:05 PM

fucked with it tonight. Same shit. Held steady for about a good 30min, lights turned on, turning the car off and on trying to kill the battery...battery stayed steady right at ~11.8....same voltage at the alt. Then all the sudden...it dropped to 9.8-10 and then just died.

My brother in laws super swoopy versus snap-on tester didn't tell us much other than what we already knew. However it did do a test and that test revealed that there was shitty ground between the alt and the battery....however that didnt change when we added a ground to the alt, turning on the lights...adding anything electrical.

It does throw a code... for the ELD, electric load detector...which I think is the alt? My brother in law seems to think the fucking alt is stupid and I should change it. I already did that shit though...and the one thats on the car now tested just as good as the brand new one.

I think swell might be onto something.
Thoughts?

check your 8mm bolt that goes into the fuse box from the alternator,and your 10mm nut on the alternator.

junkyard racer · « **Reply #28 on:** July 03, 2009, 04:17:16 AM »

Quote from: Joseph Davis on July 02, 2009, 09:33:54 PM

The ELD is in the underhood fuse box. All USDM cars have them, and only USDM ECUs look for them.

chech.

Quote from: crxvtec91 on July 03, 2009, 12:00:39 AM

Did you test power out put right at the alt?

yes.

Quote from: sewell94 on July 03, 2009, 02:18:01 AM

check your 8mm bolt that goes into the fuse box from the alternator,and your 10mm nut on the alternator.

one on the alt is solid. One that goes into the fuse box im not so sure of. Ill check it today.

junkyard racer · « **Reply #29 on:** July 06, 2009, 06:00:36 PM »

Tracked it down to fuse no15. Weird thing...it was charging great when I put a new fuse in. I let it sit and idle for awhile...was charging right at 14v. So, I thought I would take it for a quick spin around town...see what happened. Get to my wifes work, check the battery...its down to 11.4ish. Great. I head back home...it dies just before I get to my driveway. I popped the hood...put the multimeter on the battery...its slowing going up. started in the high 10's...stopped at the 11.7 range. (the car is off)

Could the ELD be bad and throwing the fuse?

One more question...the manual says something about checking pin16 (green/red) wire on the D plug that goes into the ECU. That wire is cut...or it broke or something. Where does that wire go to? On the backside of the ELD there is a green/red wire that comes out of that mofo. It was broke/cut before it started popping fuses though. I am confused.

Fuse 15 is for the alt and the speed sensor. My spedometer is also not working.

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Author Topic: help Alt not charging the battery (Read 9512 times)