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I have this 2012 F150 .The battery goes down over night, the charging system is working just fine the battery is 1yr old and has passed all testing. I did a parasitic drain test and after all modules went to sleep it had 0.020ma draw so I went ahead and put a new battery in it and in 2 days it went down. So tested the drain again and it is still at 0.020 once everything times out. Not sure how to tackle this one. Any advise would be helpfull
Did you check for drain through the alternator cable ? With single bad diode quite often the alternator will pass a charging voltage test and supply enough juice to charge the battery but drain the battery with the engine off. Simple test is disconnect the alternator overnight and check the battery voltage in the morning.
" We're trying to plug a hole in the universe, what are you doing ?. "
(Walter Bishop Fringe TV show)
Ok but wouldn't the parasitic drain check that I did at the battery eliminate the alternator circuit since its hooked up to it and since my reading was in the safe zone
0.020ma
Hi,
Please verify that your battery current drain is indeed 0,020mA.If so this would be OK.I presume it is 0.2A.
Check all the fuses with multimeter set on mV scale.The reading on fuse should be 0.00 or 0.01mV. Wait that all modules went to sleep.
Make shore that all the lights incl.trunk lights are off.The multimeter should show you on which fuse you have current going through.
Best of luck.
Thanks, It is definitely going down to 19ma when every thing goes to sleep.
I watched it all day and it stayed around that. Now when I went and opened the driver door to get the key and lock it for the eve. the meter went to 1.6amps and then went down from there and it hovered around 206ma for like 10 minutes or better and then it went up to 1.6amp range and then went down slowly to 19ma. Now after seeing that I then un hooked the meter and reconnected it and it went from 1.6amps or so and then went downward and didn't go up all of a sudden like it did with the door opening. I asked another ford tech on you tube and he says they are noted for the cluster waking up other networks due to it losing the park signal
No eBay APP ID and/or Cert ID defined in Kunena configurationHi again,
Make sure that you can acces to fuse boxes and at the same time check on which fuse you have current draw.Do not wire your meter in series .You have to measure the fuse by setting meter to mV(when modules are in sleep mode) If the problem is in instrument cluster this link might help you.
The "park switch" may be the cause of the parasitic draw,
it's an inexpensive switch that sends a shutdown signal to the BCM. When it goes bad the dash lights do not shut off and it drains the battery.
Fords fix is to replace the whole shifter assembly at around $650.00, they do not sell just the switch.
Here is the replacement switch with an more detailed explanation of why it happens.
