Question about 2001 Ford F250 Super Duty Super Cab

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Battery light When we turn lights on battery drains

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Have you had the alternator tested to see if it is producing enough power to keep the battery charged ?

Posted on May 09, 2013

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2008 Jeep Liberty error code gate on dash and interior light will not turn off got new battery and still doing it


can i buy a comma? says vanna white?? LOL !
ok, the battery drains, so you got a DRAIN, called phantom drain.
or dark current.!!
we use a thing called an AMMETER (DMM) to find all drains, easy

do you have one, want to learn or just wanting wild guessing.

on any 08 liberty, we check the scan tool data.
oops it shows battery low, wow even the PCM sees that.

new batteries do not fix drain.
nor dead alternators.

get it serviced, by a pro. ?

1: charge battery (rested its 12.6vdc )
2: start engine, scan tool shows, what DTC errors (post em')
3: battery voltage is , 13.3, to 15vdc running, if not charge system is faulting.
4: ok all that is ok, i then key off and measure bettery cable neg lug drain current, if 0.010a to 0.040a its ok, if over 0.1 amps its a drain.
we then find the drain cause, ASK? its not hard with a meter.
but i bet all you wanted is a wild guess.

Feb 02, 2015 | 2008 Jeep Liberty

1 Answer

How do I stop the anti-theft device red blinking light? Car is off and locked and from the window can see the red light blinking.


the red light drain 0.001amp. from you battery.need 1000 hour to drain 1 amp. test the battery if is any good. do drain test on the car.rust and short will drain battery overnight.after market equipment,light in the trunk or glove box, under hood light etc. disconnect the battery and install amp meter. do the drain test. your computers uses 0.2-0.4amp when sleep.anything over 0.5-.6 amp is bad. after you connect the amp meter give 1min. to turn all systems to sleep mode.Is normal the first minute to be high drain.
ones you know something is wrong disconnect the fuses one at the time and note if any changes. if the fuse you disconnect turn the amps low note what system is connected to the fuse and you will know were is the problem

Oct 24, 2014 | 2003 Oldsmobile Alero

1 Answer

Fuse box layout


Could be a parasitic drain like the underhood light, trunk light, floor light, map light, etc. not turning off correctly, something left plugged in the cigarette lighter port, or just a very weak battery that is due to be replaced, or heavy corrosion on battery terminals, very dirty battery top causing cross voltage drain. Few things to check there.

Jul 22, 2014 | Nissan 350Z Cars & Trucks

1 Answer

My 84 nissan pick up 's battery is going dead overnight and the battery is brand new and the regulator and alternator are fine.....any suggestions?


FIRST THING, START THE TRUCK, PLACE A VOLTMETER ON THE BATTERY. VOLTAGE SHOULD READ BETWEEN 13.90 & 14.80. IF THAT IS OK, THERE MUST BE A BATTERY DRAIN. TO CHECK FOR A BATTERY DRAIN, TURN OFF ALL SWITCHES, CLOSE GLOVE COMPARTMENT, MAKE SURE THE LIGHT IN THERE IS GOING OUT. OPEN THE HOOD, CLOSE ALL OF THE DOORS, MAKE SURE ALL OF THE COURTESY LIGHTS ARE GOING OUT.DISCONNECT THE NEG. BATTERY CABLE. CONNECT ONE END OF A 12 VOLT TEST LIGHT TO THE NEG. POST OF THE BATTERY. FASTEN THE OTHER END TO A METAL PART OF THE MOTOR. IF THE LIGHT COMES ON THERE IS A BATTERY DRAIN. NO LIGHT, NO DRAIN. IF THE LIGHT IS ON, YOU NEED TO UNPLUG THE FUSIBLE LINKS FROM THE POSITIVE CABLE ONE AT A TIME TO ISOLATE THE DRAIN. ALSO, DISCONNECT THE ALTERNATOR, & SEE IF THE TEST LIGHT GOES OUT.BAD ALTERNATORS CAN CHARGE THE BATTERY WHEN RUNNING, & DRAIN THE BATTERY WHEN STOPPED.

Jan 28, 2011 | 1984 Nissan Pickup

1 Answer

The battery draining of power when motor is swiched off


TO CHECK FOR A BATTERY DRAIN. TURN OFF EVERY SWITCH IN THE CAR. CLOSE THE GLOVE COMPARTMENT. MAKE SURE THE LITE IN THERE IS GOING OUT. OPEN THE HOOD CLOSE ALL OF THE DOORS. MAKE SURE ALL OF THE COURTESY LIGHTS ARE GOING OUT. DISCONNECT ANY UNDER HOOD LIGHTS. DISCONNECT NEG. BATTERY CABLE. USE A 12 VOLT TEST LIGHT, FASTEN ONE END TO THE NEGATIVE BATTERY TERMINAL, FASTEN THE OTHER END TO A METAL PART OF THE MOTOR. IF THE LIGHT COMES ON, THERE IS A BATTERY DRAIN. NO LIGHT, NO DRAIN. IF THE LIGHT IS ON, PULL EACH FUSE, BIG & SMALL, ONE AT A TIME, OUT OF THE FUSEBOX THAT IS NEAR THE BATTERY. WHICHEVER FUSE MAKES THE LIGHT GO OUT IS CAUSING THE DRAIN. IF THE LIGHT STAYS ON THROUGHOUT THE FUSE PULLING, DISCONNECT THE ALTERNATOR. IF THERE IS SOMETHING WRONG IN THE ALTERNATOR, IT CAN DRAIN THE BATTERY WHILE SITTING STILL, EVEN THOUGH IT IS CHARGING THE BATTERY WHILE YOU ARE DRIVING. GOOD LUCK

Jan 14, 2011 | 2003 Land Rover Range Rover

1 Answer

Battery keeps draining, turned off radio, nothing plugged in. Gets worse in cold weather


INTERMITTENT BATTERY DRAINS ARE HARD TO FIND. TURN OFF ALL SWITCHES IN THE VEHICLE. MAKE SURE THE GLOVE COMPARTMENT LITE IS GOING OUT. OPEN THE HOOD. CLOSE ALL THE DOORS. MAKE SURE ALL OF THE COURTESY LITES ARE GOING OFF. DISABLE ANY UNDER THE HOOD LIGHTS. REMOVE THE NEGATIVE BATTERY CABLE. USE A 12 VOLT TEST LIGHT, FASTEN ONE END TO A GOOD GROUND, { METAL PART OF THE MOTOR} . FASTEN THE OTHER END TO THE NEGATIVE TERMINAL OF THE BATTERY. IF THE TEST LIGHT LIGHTS UP THERE IS A BATTERY DRAIN. IF NO LIGHT , NO DRAIN. IF THE LIGHT IS ON LOOK IN THE FUSE/RELAY BOX NEAR THE BATTERY. PULLOUT THE FUSES, LARGE & SMALL ONE AT A TIME, IF THE LIGHT STAYS ON PUT THE FUSE BACK IN TRY THE NEXT FUSE. WHEN THE LIGHT GOES OUT, THAT IS THE CIRCUIT CAUSING THE DRAIN. IF IT NEVER GOES OUT, DISCONNECT THE ALTERNATOR. IF THAT MAKES THE LIGHT GO OUT, THERE IS SOMETHING WRONG WITH THE ALTERNATOR. IF THE LIGHT IS NEVER ON, YOU MAY HAVE TO DO THIS ANOTHER DAY TO FIND THE DRAIN. ALSO HAVE THE BATTERY RECHECKED.

Jan 12, 2011 | Ford Escape Cars & Trucks

1 Answer

M35 BATTERY DRAIN PROBLEM


INTERMITTENT BATTERY DRAINS ARE HARD TO FIND. TURN OFF ALL SWITCHES IN THE VEHICLE. MAKE SURE THE GLOVE COMPARTMENT LITE IS GOING OUT. OPEN THE HOOD. CLOSE ALL THE DOORS. MAKE SURE ALL OF THE COURTESY LITES ARE GOING OFF. DISABLE ANY UNDER THE HOOD LIGHTS. REMOVE THE NEGATIVE BATTERY CABLE. USE A 12 VOLT TEST LIGHT, FASTEN ONE END TO A GOOD GROUND, { METAL PART OF THE MOTOR} . FASTEN THE OTHER END TO THE NEGATIVE TERMINAL OF THE BATTERY. IF THE TEST LIGHT LIGHTS UP THERE IS A BATTERY DRAIN. IF NO LIGHT , NO DRAIN. IF THE LIGHT IS ON LOOK IN THE FUSE/RELAY BOX NEAR THE BATTERY. PULLOUT THE FUSES, LARGE & SMALL ONE AT A TIME, IF THE LIGHT STAYS ON PUT THE FUSE BACK IN TRY THE NEXT FUSE. WHEN THE LIGHT GOES OUT, THAT IS THE CIRCUIT CAUSING THE DRAIN. IF IT NEVER GOES OUT, DISCONNECT THE ALTERNATOR. IF THAT MAKES THE LIGHT GO OUT, THERE IS SOMETHING WRONG WITH THE ALTERNATOR. IF THE LIGHT IS NEVER ON, YOU MAY HAVE TO DO THIS ANOTHER DAY TO FIND THE DRAIN. ALSO HAVE THE BATTERY RECHECKED.

Jan 12, 2011 | 2007 Infiniti M35 Sport Sedan

1 Answer

M35 BATTERY DRAIN


INTERMITTENT BATTERY DRAINS ARE HARD TO FIND. TURN OFF ALL SWITCHES IN THE VEHICLE. MAKE SURE THE GLOVE COMPARTMENT LITE IS GOING OUT. OPEN THE HOOD. CLOSE ALL THE DOORS. MAKE SURE ALL OF THE COURTESY LITES ARE GOING OFF. DISABLE ANY UNDER THE HOOD LIGHTS. REMOVE THE NEGATIVE BATTERY CABLE. USE A 12 VOLT TEST LIGHT, FASTEN ONE END TO A GOOD GROUND, { METAL PART OF THE MOTOR} . FASTEN THE OTHER END TO THE NEGATIVE TERMINAL OF THE BATTERY. IF THE TEST LIGHT LIGHTS UP THERE IS A BATTERY DRAIN. IF NO LIGHT , NO DRAIN. IF THE LIGHT IS ON LOOK IN THE FUSE/RELAY BOX NEAR THE BATTERY. PULLOUT THE FUSES, LARGE & SMALL ONE AT A TIME, IF THE LIGHT STAYS ON PUT THE FUSE BACK IN TRY THE NEXT FUSE. WHEN THE LIGHT GOES OUT, THAT IS THE CIRCUIT CAUSING THE DRAIN. IF IT NEVER GOES OUT, DISCONNECT THE ALTERNATOR. IF THAT MAKES THE LIGHT GO OUT, THERE IS SOMETHING WRONG WITH THE ALTERNATOR. IF THE LIGHT IS NEVER ON, YOU MAY HAVE TO DO THIS ANOTHER DAY TO FIND THE DRAIN. ALSO HAVE THE BATTERY RECHECKED.

Jan 12, 2011 | 2006 Infiniti M35

1 Answer

Unknown drainage on the batteries


Here is the procedure that i use to isolate a battery drain. Remove negative battery cable from the battery. Using a 12-volt test light, hook one end to the negative battery post the other end to the negative battery cable you just disconnected. The test light will glow or "light" if there is a drain. If the "light or glow" is faint, that is probably normal draw for the clock or computer. If the "light or glow" is bright, then there is a large drain. That should be corrected. Now start removing and replacing the fuses one by one until the light goes out; that one will be the circuit with the drain. Remember to hold in the button in the door jam for the interior lights.

Jun 20, 2009 | 2005 Ford F 350 Super Duty

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