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 Post subject: Re: Battery drain time
PostPosted: Thu Jun 15, 2017 8:36 am 
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I could be wrong but a "0.37 volts on the battery in 48 hours" would, by simple arithmetic, imply a 0.74 volt drop in 4 days (96) hrs. IIRC that's enough the put the battery voltage well below what's needed to start a CRD. For what it's worth there is some discussion to the effect that some relatively high power draw systems can remain active for up to one hour after key off shutdown and that after that draw should be below 50mA. You might try waiting that long and rechecking with your meter. I suspect doing so will again blow it's fuse which won't tell you much other than confirming, what we already suspect, that some system is not completely shutting down properly.

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 Post subject: Re: Battery drain time
PostPosted: Thu Jun 15, 2017 9:22 am 
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user113 wrote:
So, a couple of tips for you when you decide to get back to troubleshooting. (I just did this in my truck last weekend.)

2. Instead of putting the ammeter between the positive battery cable and the positive post, insert it between the negative battery terminal and the negative cable. That way if a lead falls off and lands on "the chassis" it will not draw exorbitant amounts of current as would happen if you bridged the positive terminal to ground. Much safer.

I agree, the NEGATIVE battery cable should always be used for electrical problem testing of this kind!
One other idea; there are clamp-on digital multimeters available now that will read DC current flow (amps) simply by clamping the meter's device over the cable.
These modern meters also perform all other functions as well.
They can be purchased for about the same price as any other digital multimeter... :wink:

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 Post subject: Re: Battery drain time
PostPosted: Thu Jun 15, 2017 2:10 pm 
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Thanks, 113 and WWDiesel.

I do have access to a clamp-on meter, but is n analog reading meter, thus is not that accurate for small mA readings. I do like very much, and agree with disconnecting the ground terminal at the battery rather than the positive, it is a lot safer in case of an accident. I got a box of five fuses at Microcenter for $2.11 including taxes, and they have them in stock. Save the mailing time.

Also I learned of a recall F21 for the 2006 model, that also included some 2005 models, about a missprogram of the BCM that caused the battery to discharge and prevent the vehicle from starting. The post said that was for vehicles build prior to 3-15-06. I will talk with my friendly dealer and inquire about this recall.

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