Battery Drain
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Junior User
Joined: Dec 2003
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From: Livingston, TX
Battery Drain
I have a problem with battery drain with my 2013 F150 with ecoboost engine. If the truck is not used for two or three days it turns over very slowly or not at all. Charged the battery then drove it. I have checked the drain with all off and it seems to be 210 milliamps, then after about 10 or so minutes the drain drops to about 20mA.
Does anyone know what the drain should be when vehicle is off for several minutes?
Does anyone know what the drain should be when vehicle is off for several minutes?
Last edited by Jontx; Dec 3, 2015 at 02:00 PM. Reason: edit year of truck
Post Fiend
Joined: Apr 2002
Posts: 19,311
Likes: 97
From: Waterloo, Iowa
20 milliamps is within specs and shouldn't cause a problem. How old is the battery? I'd look at testing, either a load test or, conductance test. Check alternator charge voltage as well. A battery has to both accept and hold a charge.
Post Fiend
Joined: Feb 2007
Posts: 14,541
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From: Dallas-Ft. Worth
Keep in mind that these trucks have a charging circuit controlled by the PCM. It won't always be 14+ volts with the engine running. If you see the voltage varying between 13 & 14+, it's normal. They made it a bit more difficult to verify good alternators in these. 
Laughing Gas
Joined: Dec 2010
Posts: 1,200
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From: Timbuk3, MI
Most current (18Oct2015) known causes of battery drain ...
.
-click- the pic'
Goth 150
< This space intentionally -blank- >
- LEAVING THE KEY IN THE IGNITION. *TAKE IT OUT BEFORE LEAVING THE VEHICLE.
- leaving devices plugged-into the electrial recepticles. *They're ALWAYS hot.
- central timer module (component of BMS) turning on by itself intermittently. *Part of the Body Control Module.
- back-up camera harness short. - Moisture and Corrosion in camera wiring harness. - FORD RAPTOR FORUM - Ford SVT Raptor Forums - Ford Raptor
- faulty ignition switch. (key loose in)
- faulty shift lever micro-switch. - http://www.f150forum.com/f38/dashboa...2/#post3825056
- faulty door -closed- switch.
- BMS was not recalibrated after applying the ssm4475 - Radio didn't play when vehicle turned off "battery saver" - Page 30 - Ford F150 Forum - Community of Ford Truck Fans
- software calibration issue with the BMS. Radio didn't play when vehicle turned off "battery saver" - Page 30 - Ford F150 Forum - Community of Ford Truck Fans
- the sync option causing a draw/dead battery. *First check for codes in the APIM. TSB 9-14-3
- central timer module turning on by itself intermittently. *Part of the Body Control Module.
- bad ignition switch. - Dead Battery - Page 4 - Ford F150 Forum - Community of Ford Truck Fans
- BCM REPROGRAM for SSM 44750. *Changes the low voltage threshold.
- the mirror cover on the passenger visor does not close causing the light to stay on - Battery dead AGAIN. 4 batteries in 12 months!!!! - Ford F150 Forum - Community of Ford Truck Fans
- Ford had a recall on 2011 f150's for bcm failures. NHTSA 10V659000
- ... IPC reprogram which had fixed some trucks and they have also resoldered instrument cluster solder joints and replaced clusters to fix others. - Another 2013 F150 with dead battery overnight issues. - Page 3 - Ford F150 Forum - Community of Ford Truck Fans
- bad instrument cluster - Need help! Battery keeps dying! - Ford F150 Forum - Community of Ford Truck Fans
- three wiring harnesses, one of which has been mentioned here, the C405 connection. I believe this is the rear camera, tail light harness. - Need help! Battery keeps dying! - Ford F150 Forum - Community of Ford Truck Fans
.
( to be continued .....)
-click- the pic'
Goth 150
< This space intentionally -blank- >
Post Fiend
Joined: Apr 2002
Posts: 19,311
Likes: 97
From: Waterloo, Iowa
That is one hell of a list (so far, even) though, 20 mA is considered OK and wouldn't result in any issues over the course of even a few weeks. So the first suspect should the battery itself, maybe alternator, etc.
Official Ford Rep
Joined: Oct 2010
Posts: 3,123
Likes: 6
Have you mentioned the battery issues to your dealer? If not, that might be a wise next step. How many miles are on it?
Crystal
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New User
Joined: Dec 2015
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It most likely probably needs a new battery. We have a 2013 Ford F150 platinum ecoboost and if we leave the light for an hour the truck battery immediatley shuts off. Then when you go back to start the next day. It starts up and warns me that i have left the light on. Its probably the battery.
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Junior User
Joined: Dec 2003
Posts: 50
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From: Livingston, TX
Thanks for all the answers.
I went to Ford dealer and they checked the battery and then I had them replace it. It tested bad.
The truck has more than 60 thousand miles so no warrentee on the batt.
Works fine now and the 2 other problems went away. Tow haul now works and the dash info returns to my settings.
Just like a computer, if it is giving you problems jus unplug it and wait awhile and plug it back in.
I went to Ford dealer and they checked the battery and then I had them replace it. It tested bad.
The truck has more than 60 thousand miles so no warrentee on the batt.
Works fine now and the 2 other problems went away. Tow haul now works and the dash info returns to my settings.
Just like a computer, if it is giving you problems jus unplug it and wait awhile and plug it back in.
New User
Joined: Aug 2021
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2011 F150 XLT Lariet 3.5 Ecoboost intermittent battery drain
Hello
I been having this issue for months. Traced it down to fuse 18 on the BCM (Brake-shift interlock, Keypad illumination, PCM wakeup, PATS) has anyone seen this issue before? I have changed out the Brake-shift interlock micro switch I don’t think the original switch was bad. When parasitic draw occurs I am getting 1.6 AMP draw when all fuses are installed. Any help would be greatly appreciated!
Thanks in Advance
I been having this issue for months. Traced it down to fuse 18 on the BCM (Brake-shift interlock, Keypad illumination, PCM wakeup, PATS) has anyone seen this issue before? I have changed out the Brake-shift interlock micro switch I don’t think the original switch was bad. When parasitic draw occurs I am getting 1.6 AMP draw when all fuses are installed. Any help would be greatly appreciated!
Thanks in Advance
- Dave
Last edited by Justinjulie12; Dec 1, 2021 at 04:36 PM.
Hotshot
Joined: Jul 2005
Posts: 11,931
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yes.... the battery is not constantly charged by the alternator... the "battery control" logic tells it when the charge.. There is a two prong plug in the harness next to the negative battery cable... just unplug it and forget it..
Hotshot
Joined: Jul 2005
Posts: 11,931
Likes: 180
New User
Joined: Aug 2021
Posts: 3
Likes: 0
Hello
I been having this issue for months. Traced it down to fuse 18 on the BCM (Brake-shift interlock, Keypad illumination, PCM wakeup, PATS) has anyone seen this issue before? I have changed out the Brake-shift interlock micro switch I don’t think the original switch was bad. When parasitic draw occurs I am getting 1.6 AMP draw when all fuses are installed. Any help would be greatly appreciated!
Thanks in Advance
I been having this issue for months. Traced it down to fuse 18 on the BCM (Brake-shift interlock, Keypad illumination, PCM wakeup, PATS) has anyone seen this issue before? I have changed out the Brake-shift interlock micro switch I don’t think the original switch was bad. When parasitic draw occurs I am getting 1.6 AMP draw when all fuses are installed. Any help would be greatly appreciated!
Thanks in Advance
- Dave
Last edited by Justinjulie12; Dec 1, 2021 at 04:39 PM.
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