Acceptable Power Draw When.car Is.off : How To Fix Battery Drain In Your Car Parasitic Draw Test Youtube / A clock in the radio draws as little as 0.01 amps, whereas the combined interior lights can exceed 1 amp. ~ Phillips Top Interior

Acceptable Power Draw When.car Is.off : How To Fix Battery Drain In Your Car Parasitic Draw Test Youtube / A clock in the radio draws as little as 0.01 amps, whereas the combined interior lights can exceed 1 amp.. My girlfriend's jeep liberty is a 12v power outlet and is provided with constant power even when the vehicle is off. There are a few things that constantly draw power in a vehicle, such as the clock on the radio, so it's normal to have a reading between 20 and 50 milliamps. If the meter has no reading, go to step 11. So 220 ma is higher than the initial 50 ma and under which is the general rule of thumb amp draw for most cars. Clearly it needs to be replaced.

For some perspective, 0.05 amps should be the usual power draw when a vehicle is off. I would say that even 0.1 a would be excessive. If your reading is higher than that, it means there's a draw and something is using too much power. Battery power draw when car is off? \$\begingroup\$ lock the doors and wait a while (maybe ten minutes) then check the current again (with the car still locked.) the computers and stuff in my car stay active as long as the doors are unlocked.

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Yes, you dont want it hooked to a wire that is live when the car is off. On gm vehicles, divide your oem battery's reserve capacity (rc) minutes by 4 to obtain the maximum draw. In practice, the load is much less than 0.17 a. It appears that the drain on your battery must be 0.2 amp or higher (more likely 0.5 amp and higher). It is always a very low draw so it doesn't run the battery down. The ecm draws a very low current. For example, 120 (rc minutes) / 4 = 30 ma of allowable battery draw with the ignition switch off. Be aware that some electrical loads like radios and power amps can draw low current when you turn them off with the power switch.

Although i have checked the parasitic draw on my excursion in the past, i'd never photographed that test.

A real quick test for excessive battery draw is to go out and buy a cheapo 12 v test lamp, disconnect the negative battery terminal with the ignition key removed from the ignition. I have never had to check a ecm for a current draw.it is always something else drawing. I last checked a 05 silverado and after the bcm and other modules went to sleep, it had 6 milliamps of draw. The reason for that is there's a surge of current going into the vehicle charging up capacitors, powering circuit boards, and usually that current is under 1 amp (usually 300 to 750 milliamp), and then after a set duration maybe around 15 seconds or 20 seconds, that current should drop to a level between 25 and 50 milliamps. If the meter has no reading, go to step 11. Install the power control module fuse. \$\begingroup\$ lock the doors and wait a while (maybe ten minutes) then check the current again (with the car still locked.) the computers and stuff in my car stay active as long as the doors are unlocked. On your vehicle the system can cause a draw when failed. Actually it depends on the car. However the new line of bmws seem to draw more even asleep. If there is a reading, go to step 10. We use cookies to give you the best possible experience on our website. That seems like a tiny amount, but a single incandescent dome light pulls enough power to drain a battery in one day.

This may be the issue as well. This month, we feature our first guest article, written by mr. I'm showing around 100 ma draw when truck is off. We use cookies to give you the best possible experience on our website. If the meter has no reading, go to step 11.

This is normal the power antenna gets power from the radio and unless the radio is shut off either from powering it down or turning off the car it will stay up. Lights off) and my multimeter shows 50ma. Of course a larger rating battery would last even longer. Moore is owner of big wrench repair, an ase cmat l1 technician, a frequent contributor to industry publications and forums and has 40 years of experience analyzing and fixing mechanical and electrical problems. I left off for the test. Connect one end of the test light to the disconnected battery terminal and the other end to the negative battery post. Certain accessories such as clocks, radios remote door openers and alarms always need power. I know on my e150 that would be way too much.

All fuses in = ~4 amp draw (fluctuates a little) iod removed = 0.24 amp draw (steady) # 14 ignition off draw cabin lighting = ~2.8 amp draw when pulled # 20 ignition off draw radio = ~2.3 amp draw when pulled

#5 • jan 6, 2012. But other things also can draw on the battery. (70 x 0.4)/0.030 = 933 hrs = about 40 days. A real quick test for excessive battery draw is to go out and buy a cheapo 12 v test lamp, disconnect the negative battery terminal with the ignition key removed from the ignition. So 220 ma is higher than the initial 50 ma and under which is the general rule of thumb amp draw for most cars. Once asleep the draw should not be over 40milliamps or something is wrong. If there is a reading, go to step 10. Battery power draw when car is off? I looked at the battery drain with the engine off (doors closed, all. For example, 120 (rc minutes) / 4 = 30 ma of allowable battery draw with the ignition switch off. Lights off) and my multimeter shows 50ma. I always use a battery tender when i don't drive the car for more than a couple days. I left off for the test.

Gm once stated that anything over 40 milliamps draw, the battery would need recharged after 3 days of non use. For some perspective, 0.05 amps should be the usual power draw when a vehicle is off. If the meter has a reading, then there is a short circuit in the a14 circuit. The alternator is putting out 14.4v. There are a few things that constantly draw power in a vehicle, such as the clock on the radio, so it's normal to have a reading between 20 and 50 milliamps.

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There are a few things that constantly draw power in a vehicle, such as the clock on the radio, so it's normal to have a reading between 20 and 50 milliamps. A 10 watt globe will be just less than one amp so it would take nearly two days to flatten that battery. So 220 ma is higher than the initial 50 ma and under which is the general rule of thumb amp draw for most cars. I know on my e150 that would be way too much. Look for a fuse that isn't live when car is off. Actually it depends on the car. Install the power control module fuse. If your reading is higher than that, it means there's a draw and something is using too much power.

All fuses in = ~4 amp draw (fluctuates a little) iod removed = 0.24 amp draw (steady) # 14 ignition off draw cabin lighting = ~2.8 amp draw when pulled # 20 ignition off draw radio = ~2.3 amp draw when pulled

I would say that even 0.1 a would be excessive. If that is not an option, which it should be, you could run a switch between the amp and the fuse and just switch the amp off and on as you please. Certain accessories such as clocks, radios remote door openers and alarms always need power. This may be the issue as well. A 10 watt globe will be just less than one amp so it would take nearly two days to flatten that battery. The dashboard clock, for example, keeps track of time regardless of whether the car's engine is on. I'm wondering if this is a normal and acceptable drain. If i use your formulas above, i get: Of course a larger rating battery would last even longer. If the meter has a reading, then there is a short circuit in the a14 circuit. Install the power control module fuse. A clock in the radio draws as little as 0.01 amps, whereas the combined interior lights can exceed 1 amp. The reason for that is there's a surge of current going into the vehicle charging up capacitors, powering circuit boards, and usually that current is under 1 amp (usually 300 to 750 milliamp), and then after a set duration maybe around 15 seconds or 20 seconds, that current should drop to a level between 25 and 50 milliamps.