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Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions. I was having a terrible problem with the wheel bearings on my 98 Chevy Cavalier and I suspect that using this website saved me plenty of time and money. Jeep - battery drains vehicle parked, The proper way to check for a parasitic draw is with an inductive amp meter.
Constant battery drain - denali - 1999-2006 & 2007-2013, Vehicle may have a concern with the battery going dead overnight. Fixed - parasitic battery drain - ford truck enthusiasts, Fixed - parasitic battery drain 1999 - 2003 7.3l power stroke diesel.
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In review and in automotive terms, a parasitic drain is an electrical load that draws current from the battery when the ignition is turned off.
As noted in a typical TSB for a late model GM vehicle, the Reserve Capacity (RC) rating multiplied by 0.6 gives the approximate available ampere-hours (AH) from full charge to complete rundown. Important: If the battery begins storage at 90% of full charge, reduce the available AH accordingly. Although the maximum rule of thumb recommended parasitic drain is around 30 mA (0.030 amps) a typical drain usually falls into the 7-12 mA range, even though some luxury vehicles do approach the maximum. Testing for parasitic battery drains has changed a lot since my dad taught me to connect a test light in series with the battery cable in the 1970’s. That test was great…if the problem was present when you connected the battery cable into series with the meter…and if you had a good fuse in the meter…and you didn’t forget and leave the meter in series with the cable when you opened the door (a 2 amp dome light trying to make it’s circuit path through a ? amp meter fuse) or worse yet, tried to start the engine. Here is the solution to all of this…just connect an inline fuse into series with your meter’s leads. If your probe is accurate down to 100 mA, then you could be a regular MacGyver and make your own current multiplier by wrapping a piece of wire around a soda can 10 times. If you are not inclined the spend the $70 bucks for one of these from the tool truck, just bop on down to the local parts or RV store and pick up a battery disconnect switch, sometimes also referred to as a RV knife switch.
Next, with the high current battery disconnect switch closed, drive the vehicle and operate as many accessories as possible in order to duplicate the conditions that might be causing the battery drain.

Since the BCM is usually the bus power mode master device you may see it wake up first followed by other modules it might be waking up.
Hopefully your skills are sharper from this review of parasitic battery drain testing along with these tips that maybe are brand new to you.
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Hi, I have isolated the draw on my 1992 Buick Regal to the fuse that controls the dome light, glove compartment light and door locks. Next to our garage there are two pipes sticking out of the ground a few inches or so with wires attached to them. If I could get a little help diagnosing this Id appreciate it alot, it seems to be the only problem with this beautiful truck. Your "AFTERMARKET" middle light, is probably the factory dome light that may have been upgraded along the way.
I had a similar problem with my R50 - dash light telling me a door was not closed stayed on, and my interior light stayed on. Make sure you read the Forum Guidelines and don't forget to post a new intro in the New People Start Here!
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Don't just sit there scratching your head, find useful info on general car maintenance on ehow. Please provide as much information about your concern as you can. Have you checked the gauges fuse in the fuse box? It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult. I liked that I could ask additional questions and get answered in a very short turn around.

Not only did you answer my questions, you even took it a step further with replying with more pertinent information I needed to know.
Somewhere between full charge and complete rundown, the battery will reach a point at which it can no power the starter. Multiply the drain (in amps) by the time (in hours) the battery sits without being recharged.
But if that battery is at only 65% of full charge it is going to last only 2 weeks before giving the customer that “click click click” complaint. Whether you’re a student, technician, service writer or shop owner we want you to succeed through further your automotive knowledge. So rather than buy a new one I just squeezed the prongs that hold the fuse in together so it will accept a smaller automotive glass fuse.
Since she is a ditz she turned the lights off to the parking light position (causing them to stay on all night instead of turning off automatically had she left well enough alone).
We have parked three different vehicles on the ground near the garage and all three ended up with a drained battery shortly after they were parked there. I even walked around the car openning one door at a time and manually pressing all the door sensors to closed and the light never went off, the truck does not have one of these sensors as far as I can see though, so maybe its something back there. Worse, she parked close enough to the black car so that the red car rolled slightly into the black and the two were mashed together all night. Now both act like their batteries have drained and when I try to jump the red car from the handy-dandy jumping box (portable battery charger) it turns over for a few seconds & dies. This however shouldn't drain a good battery in a day but check all five of those switches (including rear hatch) first. And at -19°C (0°F), the days are reduced to 25 percent of the days it could have lasted in warmer temperatures. Finally, if those quick checks don’t find it you will simply have to disconnect components or legs of the courtesy light circuit one at a time to test for the absence of a battery drain.

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Comments Truck battery drains overnight

    Check again to ensure for all types your car's battery.
  2. FroSt
    Retain their power for charge voltage does not entirely work this way.
  3. o_O
    USB, a combo eSATA/USB, Ethernet and.