 How to read amps on a multimeter, Trying to find a parasitic drain |
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| ThinAir |
 Oct 20 2020, 11:49 PM
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Best friends  Group: Members Posts: 2,543 Joined: 4-February 03 From: Flagstaff, AZ Member No.: 231 Region Association: Southwest Region 
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Electrical systems & I are not friends, so I have little experience with this. I don't know how to interpret these readings or how the range changes what I'm seeing. Searching has turned up lots of stuff that seems to assume that you know this. TIA for the advice.
  Both of these readings were taken with the circuit in the same state. (I thought I had one when set to the 400A range). |
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| ThinAir |
Oct 21 2020, 11:30 AM
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#2
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Best friends Group: Members Posts: 2,543 Joined: 4-February 03 From: Flagstaff, AZ Member No.: 231 Region Association: Southwest Region
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Thanks guys! These meters are in series between the negative terminal and cable. I pulled the fuses one at a time and finally got a change when I pulled the one closest to the center of the car. According to the label on my fuse box cover (I think it's a JWest) this is the headlight motor circuit. As you can see, I also have a wire from my radio attached there.
 The strange thing is that after I put the fuse back, I pulled wires off the fuse box and the headlight motors one at a time, but could not get it to show an amp drop again. Then I pulled the fuse again and the amp reading did not drop. At least that was yesterday's behavior. I'm going to recheck my work today. |
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Posts in this topic
ThinAir How to read amps on a multimeter Oct 20 2020, 11:49 PM
tom.esh Top display looks to be .63 amps. Bottom display i... Oct 21 2020, 04:52 AM Tdskip @tom.esh - are you suggesting using the 200m sett... Oct 21 2020, 06:17 AM JOEPROPER Does that meter have a clamp or are you in series?... Oct 21 2020, 06:34 AM tom.esh yes, the 200ma setting should be fine. Oct 21 2020, 07:27 AM Mark Henry Volts A- set at 20, this will read in 12V range.
o... Oct 21 2020, 08:27 AM Mark Henry For parasitic drain pull all your fuses, try a fus... Oct 21 2020, 08:45 AM ctc911ctc Wait! The guy who started this thread and is ... Oct 21 2020, 12:30 PM
ThinAir
Wait! The guy who started this thread and is... Oct 21 2020, 01:11 PM Mark Henry Ahh... Jwest or Engman?
I do know on the Engman t... Oct 21 2020, 01:09 PM ThinAir
Ahh... Jwest or Engman?
I do know on the Engman ... Oct 21 2020, 01:13 PM ThinAir
Ahh... Jwest or Engman?
I do know on the Engman ... Oct 21 2020, 02:00 PM Mark Henry There is a reason, it's how the factory fuse b... Oct 21 2020, 05:01 PM ThinAir
There is a reason, it's how the factory fuse ... Oct 21 2020, 05:18 PM |
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