How can i check for a curent draw?

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BD pathfinder

Member - Posts: 10

Joined: July 03, 2003

Location: United States

Posted: August 28, 2003 at 5:44 PM / IP Logged

I need to find a power drain on a truck. How can i use my DMM to measure a curent draw on the battery to find out how much power is being used to drain a battery.

has any one ever experienced installing an alarm and haveing it drain the battery??

xetmes

Silver - Posts: 586

Joined: May 18, 2003

Posted: August 28, 2003 at 6:46 PM / IP Logged

put the DMM on DC current, take one terminal off the battery, connect one lead from the DMM to the battery post, the other lead to the connector you just removed. Note that most DMM can only handle 10-20 A, anymore and you will blow the fuse.

BD pathfinder

Member - Posts: 10

Joined: July 03, 2003

Location: United States

Posted: August 28, 2003 at 7:35 PM / IP Logged

do i need to change the post. it is now on DC v do i change it over to the DC amp.. and also do i use the DC amp setting on the DMM>

xetmes

Silver - Posts: 586

Joined: May 18, 2003

Posted: August 28, 2003 at 8:26 PM / IP Logged

usually many meters have 2 current posts for the leads, the fused DC A (usually to 2 A or so) and the unfused usually 10 or 20 A, you want to use that unfused one, but be carefull never try to start the car or anything when using this setting. Be carefull this is UNFUSED, dont hurt yourself, and if you do its not my fault How can i check for a curent draw? -- posted image.

How can i check for a curent draw? -- posted image.

auex

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Joined: December 23, 2002

Location: Arizona, United States

Posted: August 28, 2003 at 9:23 PM / IP Logged

Why are you checking for draw? Also make sure that you don't have the key in the ignition or at least the key in any other position then off.

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How can i check for a curent draw?

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