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  #1  
Old 06-16-2011, 05:21 PM
SteveKing84 SteveKing84 is offline
2003 Ranger 3.0 V6 Flex
 
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Default Confirm my ignorance; dead battery

So I've got a 03 3.0 flex fuel. It's been mighty hot here in texas recently (over 100). So today I was sitting in my truck windows up, max A/C. I turned off the truck and got back in later... battery dead. I can hear the starter clicking though. I had a coworker try to jump me with his Ford Escape... didn't go. Then I had a F250 jump me, that worked. I kept the fan off and the truck running when I drove home and parked, I thought to myself... time to test out the battery. I held the windows up buttons, turned on my lights, and as soon as I turned on the fans... DEAD!

Obviously I need a new battery, but while driving home I was watching my battery level meter, it stayed constant and my battery light did not turn on which usually means dead alternator.

My guess, shot battery and dying alternator...

Any other suggestions?
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  #2  
Old 06-16-2011, 05:32 PM
FireRanger FireRanger is offline
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Default Re: Confirm my ignorance; dead battery

Alternator is probably fine. But you can have it tested before buying a new one.
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  #3  
Old 06-16-2011, 05:50 PM
ColinS ColinS is offline
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Default Re: Confirm my ignorance; dead battery

i agree with fire ranger test it at autozone first.
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  #4  
Old 06-16-2011, 06:49 PM
SteveKing84 SteveKing84 is offline
2003 Ranger 3.0 V6 Flex
 
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Default Re: Confirm my ignorance; dead battery

Can I rely on my batter level gauge more than the battery light?
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Old 06-16-2011, 06:58 PM
FireRanger FireRanger is offline
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Default Re: Confirm my ignorance; dead battery

They do totally different things.

The gauge is showing voltage. Since ford doesn't want people to see numbers and worry, it doesn't actually indicate what the voltage is. Just below the middle is normal for the engine running with the alternator producing power. It will hold around 13.5 volts. If the alternator isn't working or can't keep up, it will start dipping lower and lower.

The light will come on if the key is on and the alternator is not producing power. It is an LED and that circuit also provides field current to the alternator for it to begin producing power. When the alternator is producing power, current can not flow through the LED and it does not light up. When the alternator is not producing power, it becomes a path to ground and power will flow through the LED lighting it up (when the key is on).

IF the fuse for that light is blown, the alternator will never start generating power. The airbag light is also on that fuse. So when you turn the key on before starting it, you should see both the alternator and the airbag light come on. If they don't, check the fuse.
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How to: Aux light wiring, relays, & fuses
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  #6  
Old 06-16-2011, 07:22 PM
SteveKing84 SteveKing84 is offline
2003 Ranger 3.0 V6 Flex
 
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Default Re: Confirm my ignorance; dead battery

Fire Ranger, always a good help on this forum. One more question (since my truck and motorcycle are my only means of travel), the battery light is dependent only on the power needed to produce light correct?

Oh, I completely forgot to add two things to this scenario!

1) After getting jumped my speedometer would pulse up and down from 0 to 20.
2) Once driving my ABS light was flashing for the first minute or two and then turned off

Thanks!
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Old 06-16-2011, 07:41 PM
FireRanger FireRanger is offline
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Default Re: Confirm my ignorance; dead battery

Not following the question about the light really.
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How to: Aux light wiring, relays, & fuses
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Info: HID Projectors
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  #8  
Old 06-16-2011, 09:40 PM
SteveKing84 SteveKing84 is offline
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Default Re: Confirm my ignorance; dead battery

Total misread, my apologies. Are my other symptoms out of the norm for my situation?
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Old 06-17-2011, 04:06 AM
FireRanger FireRanger is offline
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Default Re: Confirm my ignorance; dead battery

The speedometer and ABS light... yes... very odd and I have no logical explanation for that presuming the voltage was staying steady. If the alternator was having a meltdown and providing out of whack voltage, it could mess with those components among other things.
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2003 Edge 4.0 4wd

How to: Aux light wiring, relays, & fuses
Info: 300+ intake threads here on FRF
Info: HID Projectors
How To: NO HEAT Troubleshooting Guide
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