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Old 03-04-2007, 10:24 AM   #1
tbonevette
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Default how much battery draw? (milliamps)

does anybody know how many milliamps should a c5 use on my meter when the car is at rest?
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Old 03-04-2007, 12:31 PM   #2
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Quote:
Originally Posted by tbonevette View Post
does anybody know how many milliamps should a c5 use on my meter when the car is at rest?
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Old 03-04-2007, 12:52 PM   #3
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20-25ma [.020-.025a] is about average.no higher than 50ma[.050a]
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Old 03-04-2007, 01:04 PM   #4
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im getting 200 ma.. any thoughts on what may be grabbing the additional 150 ma's???
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Old 03-04-2007, 01:08 PM   #5
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hey DPD.. i think you may have your conversion wrong.. isnt
200 ma = .020 Amps?..

and with that is my 200 milliamps a good number for the amount of draw on my battery?.. or should it be 20 milliamps which is .002 Amps?

thanks Terry
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Old 03-04-2007, 01:12 PM   #6
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could be anything.start by pulling fuses and watching your meter.are you letting the car go to sleep before assuming you have a draw? if you are letting the car go to sleep,hop inside the car,close the door,let it die down and pull fuses 1 at a time.as soon as you see the meter drop,the fuse you pulled is the circuit that's pulling down the battery.
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Old 03-04-2007, 01:37 PM   #7
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Originally Posted by tbonevette View Post
hey DPD.. i think you may have your conversion wrong.. isnt
200 ma = .020 Amps?..

and with that is my 200 milliamps a good number for the amount of draw on my battery?.. or should it be 20 milliamps which is .002 Amps?

thanks Terry
200ma=.200

Last edited by dpd; 03-04-2007 at 05:48 PM. Reason: typed backwards.robvuk typed it correcly
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Old 03-04-2007, 04:40 PM   #8
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1000ma = 1 Amp
200ma = .200 Amp
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Old 03-04-2007, 05:19 PM   #9
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ALRIGHT! Somebody with an electrical degree set this straight so I can go measure my car.
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Old 03-04-2007, 07:37 PM   #10
Bill Curlee
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Ill do it with a PICTURE! (A pic is worth 1000 words!! )

This is my 02 ZO6 being measured for current draw to help a forum member see how to do it and display the correct current draw:

Click the image to open in full size.

Click the image to open in full size.

Click the image to open in full size.

My battery never dies!


BC
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Old 03-04-2007, 07:57 PM   #11
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Hi, I just went throught this today. 2000 FRC bought 2 months ago, 110 to 120MA draw at rest. Fuse #6, park, tail lamps, dropped 20MA when removed. Fuse #27 HVAC controls, dropped another 40MA when removed. No other fuses dropped. with #6 & #27 out, idle was 50MA, is this acceptable?

Any ideas on what to look for with #6 & #27?

Appreciate the input, these forums rock!!!
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Old 03-05-2007, 12:26 AM   #12
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Quote:
Originally Posted by Denis D View Post
Hi, I just went throught this today. 2000 FRC bought 2 months ago, 110 to 120MA draw at rest. Fuse #6, park, tail lamps, dropped 20MA when removed. Fuse #27 HVAC controls, dropped another 40MA when removed. No other fuses dropped. with #6 & #27 out, idle was 50MA, is this acceptable?

Any ideas on what to look for with #6 & #27?

Appreciate the input, these forums rock!!!
make sure you wait 20 minutes for your cars computer to go into sleep mode... then get your reading.. i got my reading at 25 milli amps (.025 amps).. your reading is still too high... get the car in sleep mode
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Old 03-05-2007, 10:33 AM   #13
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I've got an electronics degree, BSEE, and 200ma = 0.2 amps ;
20ma = .02a ( to convert from ma to amps move the decimal point THREE places to the left; to go from a to ma move the decimal point THREE places to the right).

At rest, aproximately 7-10 min after you shut the car off, you should be drawing aprox 20 to 25 ma. If you are really drawing 200 ma (0.2a ) you've got something running that shouldn't be running.
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Old 03-05-2007, 01:41 PM   #14
Bill Curlee
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YEP!!

The car MUST be at rest with everything OFF. Doors shut, trunk shut, hood light disconnected, radar detectors disconnected etc....

Once everything is off the BCM will start to shut down. You usually will set it step down in THREE steps (like..8 amps,-- 2.3 amps---- .020 amps which takes about 2-5 min to get into the sleep mode)

BC
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Old 03-05-2007, 08:15 PM   #15
Denis D
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Good info, I'm pretty sure I had it in sleep mode but will confirm this weekend when I get back to it.

Any ideas on what to look for with the current draw on fuses #6 & #27

Thanks
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Old 03-05-2007, 08:15 PM
 
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