Electronics Need help wiring something up? Thinking of adding an electrical component to your car? Need help troubleshooting that wiring glitch?

draining battery

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Old Nov 26, 2004 | 05:46 AM
  #1  
dmp7777777's Avatar
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From: illinois
Car: 1982 z28
Engine: 350
Transmission: th350
draining battery

something is draining my battery and i cant seem to figure it out i gotta disconnect it when i park it for the evening just give me a reasonable place to start looking for the problem
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Old Nov 26, 2004 | 11:28 AM
  #2  
1989Iroc-Z-350's Avatar
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From: Avondale, AZ
Car: 1989 Iroc-Z
Engine: 350 TPI
Transmission: 700R4
how fast is it draining? it could be your voltage regulator, i think napa can test it for you.
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Old Nov 26, 2004 | 03:18 PM
  #3  
dmp7777777's Avatar
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From: illinois
Car: 1982 z28
Engine: 350
Transmission: th350
the car isnt running its parked and gets drained
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Old Nov 26, 2004 | 05:19 PM
  #4  
69-er's Avatar
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From: Alamogordo, NM, USA
First thing to do is connect up digital (preferably) volt meter in series with either battery cable and measure the mA reading with ignition off. Set the DVM to mA. (connect one lead to the battery cable, the other to the battery post. It doesn't matter on polarity)

Then, start pulling one fuse at a time to see if the reading goes down. If it does go down, the problem is in that particular circuit.

Let us know what you come up with. We can take it a step at time, depending on what you find

Larry
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Old Nov 27, 2004 | 01:21 AM
  #5  
83_1/2 L69's Avatar
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Joined: May 2003
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From: SillyCon Valley, CA
Car: 83 Z-28 (Original owner)
Engine: 305 CC-carb
Transmission: Richmond 6-speed, Rear:3.73
Believe it or not, a test light works best when troubleshooting this kind of problem.

Do this with a fresh charged battery:
Remove one of the battery cables and connect a 12 volt "test light" between the battery and disconnected cable. Light will be ON of something is draining current from the battery. Make sure everything it turned off, including the interior lamps (close the doors), then pull one fuse at a time. If pulling a fuse makes the test light go dim, then you've found which circuit is draining your battery.
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Old Nov 27, 2004 | 02:36 AM
  #6  
dmp7777777's Avatar
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From: illinois
Car: 1982 z28
Engine: 350
Transmission: th350
thanks alot for the advice ill get right on it sounds right to me!
mark
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Old Nov 27, 2004 | 10:18 AM
  #7  
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From: Alamogordo, NM, USA
Originally posted by 83_1/2 L69
Believe it or not, a test light works best when troubleshooting this kind of problem.
You know, I've never tried that. I know that's a way to do this, but I like seeing numbers. Next time I work on this problem, I will try both ways.

Larry
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