12-03-2007, 10:20 PM
CF Pro Member
Join Date: Oct 2006
RE: S-10 Battery draining
And if it's not that:
This is referred to as " parasitic drain " , all modern vehicles will normally have a small amount of parasitic drain for the various electronic control modules and constant memory for things like stereos, etc.
The test for this :
With a Multimeter set to DC amps , without the key in the ignition, doors closed and everything OFF
1 - disconnect the Negative battery cable
2 - attach one lead from the meter to this negative cable
3 - attach the other meter lead to the negative battery point
wait a few minutes for the reading to settle ( this is for everything to re-initialize ) and observe the reading, which should be somewhere in the ball park of .010 (milliamp) to .020 (milliamp). [ 1 amp = 1000 milliamp and 1/2 amp = .500 amp or 500 milliamp ]
This will depend on what accessories your vehicle has.
If you find a high reading , for example .500 amps ( 500 milliamp ), you can do one of two things to locate which circuit is responsible for the high draw.
- leave everything connected as mentioned above
- remove one fuse at a time and see if the reading drops significantly
just remember to shut the door or disable the interior lights so they aren't on.
- reconnect the battery cable
- pull one fuse at a time
- place one lead of the meter on one terminal of the fuse socket
- place the other lead of the meter to the other terminal of the fuse socket
- observe and record the reading
This will direct you to which circuit has a problem.