1993 Ford Taurus battery goes dead

Tiny
NAJAMASTER
  • MEMBER
  • 1993 FORD TAURUS
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 67,000 MILES
Hi, I have a 93 Ford Taurus. The battery goes dead from sitting 2 or more days. I have replaced the battery twice. Both batteries do the same thing. They are stone dead after 2 days, unless I disconnect the battery. There are no accessories or lights left on nor is there an alarm system in the vehicle. I have checked for a parasitic draw on the vehicle leaving a meter on it for 3 hours. The highest draw I've seen is only 17 miliamps. Has anyone out there experienced this problem? Preferably a Ford tech.
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Saturday, June 6th, 2009 AT 5:22 PM

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Tiny
BMRFIXIT
  • EXPERT
Need to have BATTERY DRAIN TEST
NOTE: Amperage draw will vary from vehicle to vehicle depending on equipment package.
No production vehicle should have more than a 50 mA (0.050 amp) draw.
BATTERY DRAIN TEST
1. Ensure junction box/fuse panels are accessible without turning on interior and hood lights. Drive vehicle over 30 MPH for at least 5 minutes. Park vehicle and allow to sit with ignition off for at least 40 minutes to allow electronic modules to power down.

2. Connect a fused jumper wire between negative battery cable and negative battery post. Disconnect negative battery cable from negative battery post, without breaking the jumper wire connection to prevent modules from resetting.

NOTE: It is very important that continuity is not broken between negative battery post and negative battery cable when disconnecting battery cable or connecting ammeter. If continuity is broken, go to step 1.
3. Ensure ammeter is set to read milliamps with at least a 10 amp capability. Connect ammeter between negative battery cable and negative battery post. Remove fused jumper wire.

4. If excessive current draw is present (50 mA or more), pull fuses from battery/central junction box one at a time and note any current drop when each fuse is removed. DO NOT reinstall fuses until test is complete.

5. Check wiring diagrams for any circuits that run from battery without passing through battery/central junction box. Disconnect these circuits if current draw still exists. Repair appropriate circuits as necessary.
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Saturday, June 6th, 2009 AT 11:13 PM

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