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  #1  
Old 03-17-2011, 05:29 PM
Riq21 Riq21 is offline
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Default Battery Light

I know this is an old worn out issue, but still trying to get some resolution to my battery light coming on occasionally while driving my truck. It is a 2002 with a 2.3 engine. New battery and alt about 2 years ago. Light was coming on before the new parts and still does to this day. No starting problems or low battery conditions are ever experienced. Sometimes I can drive for 15-30 minutes with no light, then it will come on. Other times it will come on immediately and fade on and off as I drive. Sometimes low rpm will turn it off and sometimes it goes off when doing 70 mph at 2400+ rpms. Really perplexing to me and just an irritant at best. I have seen this talked about a good deal on here, just have not heard of what corrected the issue for most folks.
Thanks-Rick
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  #2  
Old 03-18-2011, 11:26 AM
Kmartcivic Kmartcivic is offline
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Default Re: Battery Light

I have the same problem with my 87. Only happens at night for me (just my luck) so it looks like a disco party with the headlights pulsating. I can't figure it out either. I just hit some potholes or take a sharp turn and it seems to go away. Id really like to know what the cure is for this problem too!
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  #3  
Old 03-18-2011, 12:07 PM
HazardousRanger HazardousRanger is offline
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Default Re: Battery Light

just my .02 but i dont know much

clean ur terminals
check ur fuses it could be a warning sign of some sort
check grounding wires
check connections and insulation

other than that ur better off waiting for a better opinion
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  #4  
Old 03-18-2011, 04:25 PM
Doctor Wily Doctor Wily is offline
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Default Re: Battery Light

I agree with check the terminals and posts. it takes very little corrosion to cause issues like this. My truck did the same thing when i first bought it 2 months ago. I would have days with no issue, then suddenly id go out to start it one night after work, would fire over then the battery light would flicker. If i stepped on the brakes the truck would buck, if i hit the headlight it would buck hard, nearly stall and only stay running if i revved it up.
It must be the battery i thought so i had autozone test it. tested bad, replaced, "fixed" the issue.....
few days later, same symptom. It must be a wire grounding and draining the battery when I let it sit i thought. I disconnected the aftermarket amp lead the Prev Owner had installed. Things were fine and it was "fixed"............
Until it happened again. So i finally decided to take a look at what was going on. I did a voltage drop test along the terminal and the post of the positive lead and wouldnt you know it I was loosing 3v right there! I cleaned the terminals and post real well, tightened the terminals up on both + and - and not a problem since!

The terminals looked clean.... Electrically speaking, they were not.

Just my .02 worth. This is a quick and easy thing to check and it costs you nothing.

Good Luck, let us know what you find and I'll help however I can!

Wily
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  #5  
Old 03-19-2011, 08:50 AM
Riq21 Riq21 is offline
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Default Re: Battery Light

The continuing saga... battery light last couple of days continuing its blinking periodically. Decided to test the battery at autozone and found it was bad. Replaced it with the gold top model. Now the battery light is very bright all of the time. Maybe the extra amps was needed to really light up the warning light Anyway, posts were cleaned well and the electric grease was used to install the cables by autozone when I got the new battery so I do believe it was installed correctly. I think I will go back over Monday as they said they will help me look a little closer to discover root cause. With all the other shit I have fixed on this truck, this is just one more challange. Still have to get the 65 mph vibration out of this thing, plus peiodic ABS warning. Any other suggestions, please bring them on.
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  #6  
Old 03-19-2011, 09:39 AM
Doctor Wily Doctor Wily is offline
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Default Re: Battery Light

so now that you replaced the battery the light is constantly illuminated?
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  #7  
Old 03-19-2011, 01:32 PM
Riq21 Riq21 is offline
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Default Re: Battery Light

literally, on all the time now. Now it just seems brighter. Starting to piss me off.
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  #8  
Old 03-19-2011, 07:38 PM
Doctor Wily Doctor Wily is offline
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Default Re: Battery Light

hmm, that might not be good. That light comes on if the vehicle is not keeping a charge (battery issue) or if the battery is not getting a charge (alternator)

If you can, you might want to have some place like auto zone test your alternator. You might have something going on there. One possibility anyway. Anyone else have any ideas?

Cheerz
Wily
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  #9  
Old 03-20-2011, 10:18 PM
Kmartcivic Kmartcivic is offline
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Default Re: Battery Light

I'm not driving my truck right now cause I finished turbo'ing my civic. But I was reading through some electrical diagrams. I'm wondering if a faulty ignition switch could be the problem. Try wiggling the key around when it's running and see If it changes the flickering of the light. I would try it but I don't have key. I have to stick a flathead into my column to grap the teeth on the actuator to turn The ignition on. Kinda a pita but I wonder if that could be the problem.
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  #10  
Old 03-23-2011, 12:56 PM
Riq21 Riq21 is offline
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Default Re: Battery Light

Bit of an update. I pulled the neg cable as suggested and ran the fuse test mentioned in another post. The light was lit when I jumped over the cable! Pulled all the fuses (fingers hurt now) and only #1 had any impact on the light in my tester. I think the scematic says this is the fuse panel fuse. When I pulled it the light dimmed in my tester, but did not go all the way out. I pulled every fuse, relay and everything else that would unplug in both fuse panels... Any suggestions from here?
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  #11  
Old 03-23-2011, 02:56 PM
FireRanger FireRanger is offline
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Default Re: Battery Light

Oh my god. Everyone just stop. That light is not a normal light. You can't just randomly mess with things and see if it might make it go away. There is only ONE condition that will cause that light to come on. Nothing else can make it come on.

If the ignition is ON and the alternator is not generating power, the light will come on. The end. It has NOTHING to do with the battery, cables, clamps, fuses, wiring, accessories, or anything else you can think of randomly playing with. The circuit is designed to do that and only that. It can not do anything else. It is not driven by sensors or the computer.

So, to actually start troubleshooting this, I need to know what the voltage is on the battery terminals with the engine running while that light is on. Do not say or do anything else. Test that and report back.

If the voltage is less than 13, your new alternator is toast and not generating any power. If the voltage is more than 13, then something is still wrong with it or something is shorting out the field current wire to the alternator... which also makes no sense.
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  #12  
Old 03-23-2011, 05:14 PM
Riq21 Riq21 is offline
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Default Re: Battery Light

Jeez FireRanger, you have some passion around this issue I see. Let me give you a little more background. 3 years ago the truck had starting issues-kept coming out in the morning to a dead battery. Went to local service station to get it checked and ended by replacing the battery, alternator and another complonant the escapes me right now. Service station torched a couple of batteries before the repair was considered complete-$900 and the battery light was on. Service station said they did not know why it was on and could not get it off, but would be no problem. Shift ahead to last week. While working on the car, if I left the door open for more than a couple of minutes or the radio was playing with the engine off, the battery would die very quickly. Had battery checked at Advance and they determined it was bad. Replaced it and battery light still illuminated. Ran a voltage drop test and determined that the alternator was doing everything it is supposed to do. Voltage was in the range it was supposed to be and I got a big head scratch. Was sent down the street to a specialist, but had to wait too long to get in. Let me know what other info would help and I will track it down. Thanks for responding.
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  #13  
Old 03-23-2011, 05:18 PM
FireRanger FireRanger is offline
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Default Re: Battery Light

Quote:
Originally Posted by Riq21 View Post
Jeez FireRanger, you have some passion around this issue I see.
I have electrons for white blood cells. Sorry.

Quote:
Originally Posted by Riq21 View Post
Voltage was in the range it was supposed to be and I got a big head scratch.
I need to know what that voltage is. We'll go from there.
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  #14  
Old 03-29-2011, 08:54 AM
Riq21 Riq21 is offline
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Default Re: Battery Light

Appreciate all the help I received here, but finally had to succumb to the local alternator shop. He discovered a pigtail under the dash that had a short in it. Dealer price for the pigtail was $16.50, labor a bit more.... It was a low voltage draw that was creating the light situation. Will pick the truck up at 1 today and will get more detailed information. He also stated that this may be the cause of the ABS light periodically coming on as the ABS cannot stand even a slight low voltage situation. We shall see as I asked him to run the ABS codes to dig into that one further also. I will report back later.
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  #15  
Old 03-29-2011, 09:06 AM
FireRanger FireRanger is offline
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Default Re: Battery Light

What you're describing sounds like this:
Quote:
Originally Posted by FireRanger View Post
If the voltage is more than 13, then something is still wrong with it or something is shorting out the field current wire to the alternator... which also makes no sense.
How anything is operating in that condition is mysterious. The wire being shorted to ground would short the field coil to ground too and you shouldn't be getting any power at all from the alternator. Obviously it's happening to you but its very odd. When they dig into it more, please do post what they find.
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