slow drain on battery
10-04-2004, 07:16 PM
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Car: '88 IROC-Z
Engine: 305 tpi
Transmission: 700r4/OD
slow drain on battery
Could anyone tell me what's the best way to tell what could be draining a battery down?
I know the battery is good and so is the alternator. What ever it is , it drains the battery after a couple of days of sitting. There should be some way of detecting this. Any ideas?
I know the battery is good and so is the alternator. What ever it is , it drains the battery after a couple of days of sitting. There should be some way of detecting this. Any ideas?
10-04-2004, 07:44 PM
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Car: 1991 Firebird
Engine: 355 TBI
Transmission: WC-T5
i'll take a shot --
close your doors -- make sure all interior lights are off.
If you've got a DVM (Digital Volt Meter) read the amperage across battery terminals when the car is off. If you've got a flashing led, say for alarm or something you might see a small number, but, otherwise you should see 0, as in the battery is putting out 0 amps when the key is not in the ignition.
close your doors -- make sure all interior lights are off.
If you've got a DVM (Digital Volt Meter) read the amperage across battery terminals when the car is off. If you've got a flashing led, say for alarm or something you might see a small number, but, otherwise you should see 0, as in the battery is putting out 0 amps when the key is not in the ignition.
10-05-2004, 02:53 PM
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Car: '88 GTA,'85 z28
Engine: L98, LB9
Transmission: 700 r4
Axle/Gears: sleepy 3.23, hello 3.73
You'll want to hook an ammeter in series w/the battery, best, remove the ground hook one end up to your batt. neg. cable, and other to neg. bat post.
Then, simply start removing fuses and replacing them one by one until the amperage reading dops to as close to zero as possible (.050 amps I think) there will always be some drain (ECM & clock & radio memory). Once you get this reading with the fuse out, you've narrowed the mystery down to your suspect circuit.
Hope that helps, I'm not the most elec. savvy person, but getting there.
Then, simply start removing fuses and replacing them one by one until the amperage reading dops to as close to zero as possible (.050 amps I think) there will always be some drain (ECM & clock & radio memory). Once you get this reading with the fuse out, you've narrowed the mystery down to your suspect circuit.
Hope that helps, I'm not the most elec. savvy person, but getting there.
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