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'02 Daewoo Nubira 1.6 car battery and handbrake light lit at the same time


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allenp
New User

Mar 12, 2022, 12:51 AM

Post #1 of 10 (929 views)
  post locked   '02 Daewoo Nubira 1.6 car battery and handbrake light lit at the same time  

Hello,
recently I've seen a couple of times after starting car (hot or cold) that my car battery light (and handbrake light) are just barely lit, than lights up more bright or dimmer after a while...
If I press on the gas pedal, it will disappear seeming like everything is normal. It doesnt always happen, just a few times in last 5-6 days.

Also, in one instance (while they were lit), my car died on me while driving (it has gone to idle in between gear changes - manual transmission), I immediately fired it up again and it fired normally, didnt happen again.

I've tried refilling car battery after that, but it was almost full anyways, voltage was 12.9V approx, it filled to 13.1 and stopped filling in matter of minutes.

Yesterday I've measured voltage on the battery while car was running on idle in different conditions:
under no load (lights were off, radio off, heating off, everything but the engine off): - 13.5 to 14.1V if I remember correctly (should've written it down)
under middle load (lights were on, radio on, low volume, heating on to number 3 setting): - 13.2 V
under heavy load (lights, both short and long on, radio on full volume, cabin lights on, fog lights on, heating to full, turning lights on, rear window heating on...) - it eventually dropped to 12.1 V

Remember, my car battery with car off measures from 12.7-13.1 V!

Also under heavy load and at 12.1V measured, there was still no car battery or handbrake light on on the dashboard.
But I've noticed red battery cable contacts were hot (I couldn hold my hand on it longer than a second or two), black contacts were cold...

When my wife pressed on tha gas pedal under full load to around 2000RPM, voltage went up to about 13.2V.

Is my alternator dying or what?
Are those readings normal or not, does the fact that the red contacts are hot means that car is pulling power from a battery instead of alternator (generator)?

If my generator is dying, what would be the first suspect? Diode bridge or what?

Also, I've got Hantek1008c and would like to know how to pull additional measurements on the generator to know for sure if it needs refurbishing.

Thanks in advance guys!!


Tom Greenleaf
Ultimate Carjunky / Moderator
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Mar 12, 2022, 3:59 AM

Post #2 of 10 (917 views)
  post locked   Re: '02 Daewoo Nubira 1.6 car battery and handbrake light lit at the same time  

Welcome I see you are in or from Coatia. It matters a little as to what might be available to you and please know this is a US site and that exact car doesn't exist here but basics are basics.

* If you wanted a first, best guess you need a battery this is now 20 full years old you said you could add water! That means it's old to me, you can't as they are sealed here would guess most anywhere by now.

Adding water (when you could) the 6 caps or two covering 3 holes could spit acid and cause all kinds of assorted problems.

** Voltage you observed when running is about right on so chances are charging system is OK. You can tell by watching that range stay there with lights all on, a heater blower motor on full and just raise idle speed to about 1,500 RPM should also read about that. If not I'll go thru more reasons why it didn't.

*** Things to do and check: Belt(s) have to be tight enough IDK how these are tensioned either a tensioner or manually tightened. Not too tight and not too loose either.

They also need to be i good shape.
All terminals need to be clean even if they look OK may not be. You seem to know a bit about this I'll refresh to remove negative first and on last when done.

If "u-bolts" bust find and properly solder in new ends whole cables may not be available.

Check neg cable to engine and pos cable to starter motor (when disconnected) too just clean them up.

If you can find use "dialectic" grease after cleaned up, sand paper or wire brush - protect your eyes from bits of junk doing that.

Please know and I'll try to simplify this idea that voltage is just "push" like water thru a hose and the power is "AMPS" the horsepower of a battery it's main job is crank the engine also run items when at low idle when alternator isn't keeping up - otherwise it's just going along for the ride but you need it badly to be good all the time.

Sound old or old style now like everything more costly new try to have it pre-charged before putting one in so you don't make alternator work too hard.

Hope that helped at least clean up connections it used some water to me means it was stressed out already boiled some out charging up too fast??

Tom



Tom Greenleaf
Ultimate Carjunky / Moderator
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Mar 12, 2022, 4:22 AM

Post #3 of 10 (904 views)
  post locked   Re: '02 Daewoo Nubira 1.6 car battery and handbrake light lit at the same time  

Handbrake light? Many cars use cables that do NOT return to fully OFF when released.
* First pull the pedal or arm that releases is up or back to OFF. Light should turn off say if it doesn't.

Cable stick in their casings are actually released by plain springs can't overcome corrosion in the cable(s) usually at the rear of cars some use front brakes as parking brake not very many IDK, already said they don't sell this here. Tug on them under the car see if that helps it's hard to "push" a cable but try anyway,

Tom



Hammer Time
Ultimate Carjunky / Moderator
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Mar 12, 2022, 4:23 AM

Post #4 of 10 (902 views)
  post locked   Re: '02 Daewoo Nubira 1.6 car battery and handbrake light lit at the same time  

Stop with all the voltage readings. They are telling you nothing about the actual health of the battery and it's ability to hold a charge. Everything over 12.5 is just a meaningless surface charge.

The very first thing you have to do is have the battery tested and I don't mean just read the voltage. I suspect it needs a new battery before looking at anything else. The rest of the testing won't be accurate until you have a known good battery. Only after that can you get an accurate charging system test.



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



allenp
New User

Mar 13, 2022, 12:17 PM

Post #5 of 10 (842 views)
  post locked   Re: '02 Daewoo Nubira 1.6 car battery and handbrake light lit at the same time  

Today, Ive tested battery and alternator with Hantek1008c, seems to me everything is fine with them, although I might be wrong easily, as Im no expert, by any means. Voltage drop was from about 12.5 to 8.5V while starting the car.

Also, while car was running, my wife was trying to change load to generator/battery, rpm, almost at every combination of load/rpm voltage generated by alternator was lower than battery voltage when car was off...

Except, seems to me, at random times when generator "came to life" and voltage rose to 14.5V as a constant. Only when car was turned off, the generator again came to its old self and pulled out less than battery voltage again...


It seems to me that computer is giving the generator wrong signal(s) and it is the main culprit for this sudden and odd behaviour..

At least, that is what I was able to read out using YouTube videos and some online tutorials.

If necessary, I will post my scope readings when I get the chance. In the meantime, please tell me what you think about that.

Thanks in advance.


Hammer Time
Ultimate Carjunky / Moderator
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Mar 13, 2022, 12:27 PM

Post #6 of 10 (839 views)
  post locked   Re: '02 Daewoo Nubira 1.6 car battery and handbrake light lit at the same time  

From what I can find the Hantek1008c is a cheap $100 scope. I don't know what you are expecting to diagnose with that.

The only test you did that was even a little bit useful was the load test when cranking and that result wasn't very good.

As advised before, the first thing you need to do is have the battery conductance tested for health to give you a CCA reading
.



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



(This post was edited by Hammer Time on Mar 13, 2022, 12:31 PM)


Tom Greenleaf
Ultimate Carjunky / Moderator
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Mar 13, 2022, 12:56 PM

Post #7 of 10 (831 views)
  post locked   Re: '02 Daewoo Nubira 1.6 car battery and handbrake light lit at the same time  

I don't know nor familiar with that test device. Voltage is a clue not complete but shouldn't see 8.5V with load of cranking it.
Earlier said turn things on the use move AMPS is a test how long it can hold up and still start. If lights inside (leave door open) dim badly that's another clue.
Reason would be the battery just doesn't have the AMPS so voltage also drops. If ever below 9V should trigger a warning light like an icon of a battery is just saying volts dropped too low for the moment.
How old is this battery? Here at least all are marked either a date or abbreviation like A-7 should mean last known new or good for sale in January of 2017. That's too old in my opinion to count on. That could also be in code unreadable but known for warranty purposes ask a dealer that sells that brand.
It could if ridiculously cold wouldn't have much power it drops AMPS quite a but below 32F is the rating of CCA or Cold Cranking Amps or zeroC.
That's fairly universal to 12V systems that are electric start a car or other machine.
In short - lead/acid batteries age all by themselves without use at all shouldn't be sold new if over a year at least here they recycle those nobody wants the grief.
The handbrake really isn't related in my opinion do check why till you find out,


Tom



allenp
New User

Mar 20, 2022, 6:36 AM

Post #8 of 10 (647 views)
  post locked   Re: '02 Daewoo Nubira 1.6 car battery and handbrake light lit at the same time  

update:
https://youtu.be/NX-Mu2rITUE

Is this behavior normal or not?
While rotating rotor by hand, sometimes it lights up dummy light, sometimes it doesn't, also, on some positions of rotor small push on the rotor inwards turns off/on light, and on some positions of rotor small pull on the rotor outwards turns off/on the light.

Thanks in advance to any comment.


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Mar 20, 2022, 6:55 AM

Post #9 of 10 (638 views)
  post locked   Re: '02 Daewoo Nubira 1.6 car battery and handbrake light lit at the same time  

OK, just stop with this insane testing. We've told you we don't have that car here. We've told you multiple times to have the battery Conductance tested but you keep coming up with these meaningless tests.

I'm closing this question now because you haven't followed even the basic testing we suggested.



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



Tom Greenleaf
Ultimate Carjunky / Moderator
Tom Greenleaf profile image

Mar 20, 2022, 7:04 AM

Post #10 of 10 (633 views)
  post locked   Re: '02 Daewoo Nubira 1.6 car battery and handbrake light lit at the same time  

Not quite sure of those testing methods? Easier to test in car if one runs and does. LOAD testing MAKE it work hard like starting it up watch voltage is enough for me.

If below 9V charge battery up most charger will say it's OK now is only holding voltage so would a battery for a scooter would start a car. That's amps.

There's a sealed diode trio unserviceable now to ones I've working in the US is not sold one by one or separately so whole units rebuilt or new some costly some cheaper that wasting time.

It's also playing "intermittent" games with you makes it awful hard to be sure exactly what or why then. Can lead to tossing parts it didn't need is a waste plus old part might have been better than the new item.

If you are clever enough you can take that alternator apart and look at back end how brushes look and if diodes are burned AYOR do that all wrong you'll wreck a good one.

IF you do, use some super fine wet/dry sandpaper just shine the surface right where now known good brushes touch is frequently all that's wrong.

Brushes are spring loaded to push BTW it won't re-assemble without holding them back usually paper clip wire or what works with holes to do that.

Google or YouTube just what I said I'm sure it's out there. AYOR as said this has gone on long now without knowing or saying what is known good now to rule out,

Tom







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