Question about 2002 Ford SVT Focus

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Something is draining my battery overnight already tested battery starter altenator cellinoid

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  • katg23 Jul 28, 2008

    I have the same problem with my 2000 expedition. also with mine, I went out to unlock my truck and the running board and interior lights started flashing until i got in the truck and shut the door. i turned the key but had a dead battery. this has happened several times but the flashing lights only twice. ford has no solution but to trace the wiring since it wont code. . the GEM module checks out ok. wire tracing is expensive to say the least but there seems to be no other solution since alternator and GEM checks out. I questioned the GEM due to all the complaints on windshield leaking. I really wish someone had more info on this. my battery drains in 2 weeks with everyday driving.

  • Anonymous Mar 15, 2014

    Brand new battery but something is draining power.

  • Anonymous Mar 19, 2014

    the battery will drain overnight but not at all times. it acts like something is draining the battery.

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Hi there,

This response contains troubleshooting procedures designed to locate the cause of an overnight power drain resulting in a dead battery, It assumes the charging system is working.

The first (and easiest) test I run is on the battery.

When you are done using it for the evening, pull the Negative battery cable.

In the morning, re-connect it. If it's dead again, the battery need replacement. This does not necessarily mean you found the problem.

If it starts, the battery is ok. It's time to look for the power drain.

With the ignition off, ensure the systems that should be off actually are off. For example: does the radio still come on? Wipers? Etc.?

In the same vein, has anything new been installed lately?

The next test is a lot more tedious. You will need a test light, needle nose pliers (to pull fuses) and the proper tools to remove the negative battery terminal (again).

  • Ignition off
  • Remove the cable from the Negative battery terminal
  • Hook one end of your test light to the Negative battery post
  • Attach the other end to the cable you just removed
  • Again, double check connections to recent installations (radio, GPS, etc)
  • If it lights up very faintly, this is likely the normal drain of the clock. The brighter the light, the bigger the drain.
  • Find your fuse box
  • While keeping an eye on the test light, pull the fuses one by one. Replace the one just pulled before going to the next.
  • When the light goes out (or dims), you will have narrowed the the problem to a specific system. Check the legend on the fuse box for the offending fuse.
At this point there are too many 'What if's'. Which system has the drain will determine the next steps to be taken.

This procedure will allow you to focus in on the problem area. Let me know what you find out.

Hope this helps

Mike

If you found this helpful, please take a sec and rate this response. Thanks.

Posted on Jul 24, 2008

  • nikinicolosi
    nikinicolosi Apr 10, 2012

    yep this works, but instead I used a AMP meters to see how many AMPS, and in my 2004 ford focus SVT is drawing 0.160mA and the all power drains come from the fuse #36 which I read in my owner manual is AC controller, Cluster, hazard lights, 160mA is normal, as soon I take out that fuse the power drain goes down to 1mA which I think is the factory alarm and radio clock, the battery goes dead and the car as a missing fires problem, I think it's all electric, and the FORD dealer have no idea what the problem is, I allready spend 2000$ in repairs, and they still want more money to look and trouble shot
    Please any advice?

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Test the output of the alternator, 14-15 volts is what you are looking for.

Posted on Dec 11, 2008

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