1990 Mercury Sable Battery Drain

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FREEBIRD_SARAH
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  • 1 POST
My Mercury sable is having a big problem...The mileage is near 200,000 now...The battery gets drained if I leave it connected...Otherwise it is fine.. I ahd the alternator checked today and it is working normally... So I came home and tried something that you suggested in another post..
[quote:fd681a85d3]Answer: Here is the procedure we 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.
I didn't have any luck with this...I was told that there maybe another fuse panel located elsewhere in the car...Could you tell me if there is and where it could be found?...Also what else could be the problem?? Thank you...[/quote:fd681a85d3][/b]
Jan 3, 2007 at 1:03 PM
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CARUNDELL
  • ✓Experienced Mechanic
  • 602 POSTS
[quote:623914404e="freebird_sarah"]My Mercury sable is having a big problem...The mileage is near 200,000 now...The battery gets drained if I leave it connected...Otherwise it is fine.. I ahd the alternator checked today and it is working normally... So I came home and tried something that you suggested in another post..
[quote:623914404e]Answer: Here is the procedure we 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.
I didn't have any luck with this...I was told that there maybe another fuse panel located elsewhere in the car...Could you tell me if there is and where it could be found?...Also what else could be the problem?? Thank you...[/quote:623914404e][/b][/quote:623914404e]

Hey sarah,
There should be 2 electrical centers, one under hood in the engine compartment and the other located under dash, drivers side.

Chris
Jan 5, 2007 at 8:33 PM

Suggested Repair

Check both electrical centers when isolating the battery drain: one under the hood in the engine compartment and one under the dash on the driver's side.

Conversation Summary

A 1990 Mercury Sable with about 200,000 miles drains the battery when left connected, though the alternator tested normal. The owner tried a test-light fuse-pull procedure without finding the drain and asked about another fuse panel. The expert said there are two electrical centers, one under the hood and one under the dash on the driver's side.

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