Question about 2008 Ford Ranger

1 Answer

I have a 2008 Ford Ranger with a good battery, good connections, good alternator, etc. I have been trying to,figure out why the battery is draining overnight only. This happened twice and both times

Please help us to determine what to do to keep the battery from draining. I am currently disconnecting the battery every night.

Posted by on

Ad

1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    Hot-Shot:

    An expert who has answered 20 questions.

    Corporal:

    An expert that hasĀ over 10 points.

    Mayor:

    An expert whose answer gotĀ voted for 2 times.

  • Expert
  • 58 Answers

Switch your Digital Multi meter to DC AMPs. Amps is usually indicated by an "A" on the Multi meter Switch. AC is usually shown as a "~" symbol and DC shown as a "-" symbol. You usually have to move the multi meter positive lead to a separate socket on the multi meter to check for amps. Sometimes there are 2 sockets, (a high range and a low range). Always test on the highest setting first. For example: High setting on your multi meter may be 10 Amp. Test on the 10 Amp setting first, then if the current drawn is less than your Multi meter's (low setting) move to that setting and keep testing. For example: On my multi meter the low setting is 0.3 Amps. Also indicated as 300mA (mA x 1000 = A).

Remove the battery's positive cable.

Connect the multi meter's positive probe to the battery's positive post while simultaneously holding the negative probe from the multi meter up in the air, to keep it away from anything metallic.

Place the negative probe of the multi meter on the end of the removed positive cable to complete the circuit.

That's right, you're putting a negative on a positive, but its ok, because if the drain is severe enough, you're most likely to blow a fuse or two, which will identify the problem area.

Above I said to remove the positive battery cable because that is the way I do it. You can do the same test with the negative battery cable removed. In fact for you that may be a better way to do the test, because there would be no way for any electrical issues to occur by accidently grounding the negative probe from the multi meter. i hope you understand what I'm saying here.

Posted on Mar 28, 2014

Ad

6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Ad
  • 12 Answers

SOURCE: Charging system

change your battery cables and check all wires on the alternator for loose connections, expecially the grounds.

Posted on Oct 12, 2008

Molson02536
  • 3854 Answers

SOURCE: Current drain

Check the light under the hood, the switch may be bad and the light stay's on all the time and over the visor. Check to make sure the vanity light is off also.  It's just a start and i have known also that the 4X4 actuator will drain too. Keep me posted, be glad to help and it sounds like it's going to be a gremlin to find the battery drain. 

Posted on Jun 23, 2009

morse008
  • 1111 Answers

SOURCE: Draining Battery on 1996 Ford Contour

you will need to do a test with a battery light disconnect the negative wire on the battery and connect one end of the test light to the battery and the other to the terminal with everything switched off if the test light is lit you have a draw if it is not lit then it is something else sometimes door switches and glove box switches wear out and need added lift to properly shut the open circuit down

Posted on Aug 26, 2009

RonPark
  • 855 Answers

SOURCE: my 1988 ford f350 keeps drawing the battery down

You are going in the right direction. When you have a draw or drain on the battery when not in use the way to find it is as follows. First disconnect the negative cable at the battery. Put a test light between the cable end and the battery post. Have all the doors shut and the key in your pocket. If you have a draw the light will be on. Now that it is on go to the fuse box and pull one fuse at a time and recheck. When the light goes out now you know the circuit to check. The fuse links cover more than one circuit using the fuse method is faster and narrows it down more. Once you know the circuit you can start checking things. Common draws are interior light on and glove box light. Also check the under the hood light the mercury switch in them goes bad alot and they will not light or stay on all of the time. If you think the hood light is a problem slow drop the hood and look under it to see if the light goes out. While checking for the draw if the light works fine just take the bulb out so you don't get false readings. This system to find draws works for I used it for 22 years. Good Luck.

Posted on Sep 27, 2009

drsinister69
  • 2317 Answers

SOURCE: 2000 ford ranger. New battery and brand new

You are correct about that. I would have the new alternator tested, you might have gotten a defective alternator. Whenever I get another alternator, I usually have it tested, I got one from Auto Zone for a Saturn, (which is a pain to change) and had them test it, and low and behold it was defective!! I would check your connectors and if any wires have high resistance.

Posted on May 18, 2010

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

94 ranger battery new alternator charging but wont crank


10 volts isn't good and if you have a weak connection, it won't turn it over. You should have 12+ from a good battery. Try cleaning the battery connections with a battery brush.

Jun 18, 2014 | 1994 Ford Ranger Supercab

Tip

Going through starters and alternators?


If you keep replacing starters and alternators, they aren't the problem. Starters: check your battery's ground cable.
Alternators: Make sure you're also replacing the rectifier circuit. Alternators make alternating current and it must be converted to direct current. This happens in the rectifier, and arrangement of three diodes. Diodes are like a one way street for electricity. But sometimes, they fail and leak backwards.
Then they quietly drain your battery overnight. It drives a lot of people nuts figuring that one out.

on Aug 13, 2012 | 2000 Ford Ranger SuperCab

2 Answers

2002 ford ranger wont turn over?


Are you saying the engine will not crank, or not start ?

May 29, 2013 | 2002 Ford Ranger Regular Cab

2 Answers

Something is draining the battery on my 1985 Ford Ranger 2.3 and alternator, starter and voltage regular tested as good. What else could be draining the battery?


Best thing to do is disconnect the neg battery terminal put your volt meter on amps and hook it up in series from the neg cable head to the battery neg and disconnect fuses one at a time until the draw goes away,then narrow it down from there

Sep 04, 2011 | 1985 Ford Ranger

2 Answers

My 91 ford ranger doesnt want to stay started, all lights are dim. I think its the alternator. the battery only had 8 volts as well


It sounds like the alternator is draining the battery. I would remove the alternator and have it tested at a local parts store. I would also charge the battery and have it tested too.

Nov 07, 2010 | 1991 Ford Ranger Supercab

4 Answers

2002 ford ranger quit running on highway, pulled over tried to start but wouldn't crank over, starter just clicked like a dead battery. thought alternator died then drained battery. today jumped battery,...


If the starter is just clicking,then it is not,but if the starter is kicking the starter drive out,and that is the noise you are hearing then it might be,turn the crank pulley with a socket and ratchet ,clock wise,if it turns then this is not the problem,make sure the ground to the engine is good,if the ground cable has gone bad,this will happen.

May 23, 2010 | 2002 Ford Ranger Regular Cab

1 Answer

My 2000 ford ranger and something draining battery


bad alternator possible or bad battery..even though its new that battery can be bad. I would take a volt meter and with the engine running check the volts of the battery..If the volts are 12 you need to replace alternator, if volts are 14 you need to check the battery. to check the battery hold the volt meter to the battery and have someone start the car..while the starter is cranking battery volts should not drop below 10volts.if they do your battery is bad.

Jun 11, 2009 | 2000 Ford Ranger SuperCab

1 Answer

Problem with loosing charge on battery it seems that the alternator is draining it. have replaced both and the same problem. have also checked all other connections on the motor and still no luck. any


is voltage at battery when engine running and headlights on around 13.5-14volts?
if so its not the alternator
do a current draw test with amp gauge in system with everything off 0.02-0.05amp good any more than an amp will drain battery over night something staying powered up or a short can cause this

May 30, 2009 | 1989 Ford Ranger

1 Answer

Charging light on and motor dies


You have checked the alternator and the connections to it?

Mar 12, 2009 | 2003 Ford Ranger Regular Cab

2 Answers

Starter?


check the connections on your startermotor are all ok... mainly earthing... try using your jumpers to ground the engine to your battery... and hey try push starting... dont need a starter motor that way and lets you know if the engine is ok

Oct 28, 2008 | 2001 Ford Ranger Regular Cab

Not finding what you are looking for?
2008 Ford Ranger Logo

108 people viewed this question

Ask a Question

Usually answered in minutes!

Top Ford Experts

yadayada
yadayada

Level 3 Expert

76164 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22156 Answers

fordexpert

Level 3 Expert

5522 Answers

Are you a Ford Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...