Parasitic Short
01-02-2006, 11:22 PM
#12
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Compromise
I will perform both methods of finding the short.
Your guys and the internet site.
I will keep track of both volts and amps.
Kill two birds with one stone.
Your guys and the internet site.
I will keep track of both volts and amps.
Kill two birds with one stone.
01-02-2006, 11:27 PM
#13
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Using your method
What do I connect the negative and postive probes of multimeter too? (set to measure amps)
How high should I set my multimeter, in terms of amps?
Do I simply stand there holding the probes, while helper disconnects fuses one by one, while I write down the amp loss on each fuse pull?
When helper pulls fuses one by one, does he immediately insert back before he pulls the next fuse?
How high should I set my multimeter, in terms of amps?
Do I simply stand there holding the probes, while helper disconnects fuses one by one, while I write down the amp loss on each fuse pull?
When helper pulls fuses one by one, does he immediately insert back before he pulls the next fuse?
01-02-2006, 11:36 PM
#14
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Re: Using your method
Originally Posted by dougworner
What do I connect the negative and postive probes of multimeter too? (set to measure amps)
How high should I set my multimeter, in terms of amps?
Do I simply stand there holding the probes, while helper disconnects fuses one by one, while I write down the amp loss on each fuse pull?
When helper pulls fuses one by one, does he immediately insert back before he pulls the next fuse?
How high should I set my multimeter, in terms of amps?
Do I simply stand there holding the probes, while helper disconnects fuses one by one, while I write down the amp loss on each fuse pull?
When helper pulls fuses one by one, does he immediately insert back before he pulls the next fuse?
If it'* a digital multimeter (DMM), simply set it to autoscale. Most of what you'll read will probably be less than 1 amp.
Simply stand there holding it connected, but you'll have to free a hand to write numbers down.
You can do the fuse pulling in one of two ways. Either pull them all until the draw stops (have your helper 'map out' where they were), or simply write down how much the total draw DECREASED for each fuse pulled, then put it back.
That article was probably written in the manner it was in order to cater to the average homeowner who knows how to read volts (in parallel) so they wouldn't have to go into a discourse on measuring current (in series). Most people don't know how to do it. That article was written for the layman as a general guide, but it must be done with current to detect small parasitic draws.
01-03-2006, 12:10 AM
#17
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Write 'em all down. You're pulling 1.56 amps (as an example) and you pull fuse #12, and it drops to 1.43 amps. We want the difference (0.13 amps, or 130 mA) for that fuse.
Doug, we WILL get your problem beat. Nobody is better at it than us. Not even the dealer.
Doug, we WILL get your problem beat. Nobody is better at it than us. Not even the dealer.
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