Brake and Bat dash lights on.

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Brake and Bat dash lights on.

Postby Ninja0n3 on Sun Jul 05, 2009 5:22 pm

So, engine problem aside, a couple of days ago I noticed the following problem:
Brake and Bat light on the dash would intermittently go on and off on the dash. I wasn't sure whether this was a short somewhere doing this.

Now after some research on the net, I read that it was related to the charging system and the alternator (or it could be a blown fuse for Engine control on the fuse panel).
So I checked for the fuse panel, the fuse wasn't blown.
Went on to start the car and disconnected the battery to see if it was still running. Car shut down as soon as it lost contact with the bat.
I'm assuming this means the battery is not being charged by the alternator, is there any way to easily test the alternator or do I have to take to a shop (given that I have a limited set of tools).
I'd like to determine whether it is a wiring problem or if the alternator just gave away.

In the case that my alternator is busted, does anyone have an S14 alternator and how much would I be looking at spending on it.

Thanks.
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Re: Brake and Bat dash lights on.

Postby thetest on Sun Jul 05, 2009 8:17 pm

Does your battery goes dead after driving for a while? If the alternator was dead, the battery would die after a while as well since the battery has nothing to charge it. Some shops have a alternator tester, not a tool everybody can get (expensive tool). Although, if you have a DVOM (assuming you know what that is), check for the voltage at the batt terminals while the engine is running (remember to get the proper polarity of the test probes - red to positive terminal and black to negative terminal). If the alternator is fried, you should have less than 12V and steadily going down. If the alternator is working as it should, you should get more than 13.5V constantly at idle.

What year is your car? Can you check for codes, if you can, do so (the lights might give you a Diagnostic Trouble Code). If not a shop might do that for ya.

Let us know how it goes,

V.
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Re: Brake and Bat dash lights on.

Postby bartyb on Mon Jul 06, 2009 12:57 pm

Stop driving with the engine check light! :nono: I offered you my obd2 reader more than a year ago :ugh:
If the car dies when you disconnect the battery that's usually a very bad sign that your alternator or it's regulator are toast, assuming your wiring is ok (no loose connector, etc).

As for checking the battery, any canadian tire can check your alternator and/or battery for free, but you have to remove it from the car and bring it to the counter.

I might drop by tonight with the reader and a alt tester, because I fear that otherwise you'll never find out what the engine codes are :mrgreen:
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Re: Brake and Bat dash lights on.

Postby MRWmotorsports on Mon Jul 06, 2009 4:58 pm

Sounds like your alternator is toast.
But it also sounds like your engine is toast too... in which case you'll need to find another engine.
But look on the bright side, maybe the new engine will come with a good alternator!

BTW.. you shouldn't be allowed to own a car if you are going to let it run out of oil.

-Martin.
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Re: Brake and Bat dash lights on.

Postby Ninja0n3 on Mon Jul 06, 2009 5:09 pm

MRWmotorsports wrote:Sounds like your alternator is toast.
But it also sounds like your engine is toast too... in which case you'll need to find another engine.
But look on the bright side, maybe the new engine will come with a good alternator!

BTW.. you shouldn't be allowed to own a car if you are going to let it run out of oil.

-Martin.


Thank you for your input, that last comment was unnecessary though... We all make mistakes.
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Re: Brake and Bat dash lights on.

Postby maxpower240 on Wed Jul 08, 2009 6:32 pm

MRWmotorsports wrote:Sounds like your alternator is toast.
But it also sounds like your engine is toast too... in which case you'll need to find another engine.
But look on the bright side, maybe the new engine will come with a good alternator!

BTW.. you shouldn't be allowed to own a car if you are going to let it run out of oil.

-Martin.


geezus, tought crowd round here
dreamin of 1997-1998 240sx silvias....
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Re: Brake and Bat dash lights on.

Postby Nismo on Thu Jul 09, 2009 3:28 am

maxpower240 wrote:geezus, tought crowd round here


We have a reputation to maintain.
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