Low Amp Clamp(parasitic Draw

[CKGAULT]

I have a modis(fairly new) and am using the low amp clamp for a parasitic
draw. I am having some issues, I put the clamp on the underhood fuse block
feed wire from battery and started to pull fuses, I have all the fuses out of
the underhood and ipc fuse block, still have a 45 mA draw, I have removed
the alt. b+ and regulator conn. off and still have a draw, I removed the clamp and re-zeroed the clamp and reinstalled now draw is gone, am I doing something
wrong or is this not a good way to check a draw?

Clint

[MasterWrench]

Did you wait for the specified time for all modules to time out? Maybe the bcm or another module was still awake and needed time to shut down.

[CKGAULT]

RE:

Yeah, I let the car sit for 25 minutes, started out with 3.45 amp draw till
everything timed out. I have had this issue before with the low amp clamp
and a parasitic draw but ended up using a fluke and battery cable shutoff
adapter, thought I would try the clamp againg today. Not sure if I should rezero
it after every fuse or am I missing something?

Thanks,
Clint

[MasterWrench]

Re-zeroing it shouldn't make the draw disappear.

I do not use the amps setting though. I use 200mv setting to check for draw.

[bwrench]

I do not recommend using a low current probe for very small parasitic draw tests over a long period of time. With Most current probes, using a very low current setting, it is too easy for the probe to drift, or pick up transient magnetism. By far the best way is to start out with a high current switch hooked in series between a battery post and a battery cable.Use the internal amps function of your, since this is a very stable setting. I do realize that Modis will not do this function though, but most any multimeter will. Now you are measuring all of the current that is being drawn from the battery. Start pulling fuses and you will find where your current is going. A wiring diagram is also a very useful tool for things like this too.

[CKGAULT]

Thank you for the input, I agree with you on the probe being somewhat
inaffective on the draw, I am using my fluke and cable adapter to check, seems
more precise.
Thanks again,
Clint

[CKGAULT]

Thank you also, I'll have to try the mv scale on some stuff at home and play
with it some.

Thanks,
Clint