TwinTurbo.NET: Nissan 300ZX forum - HUGE current draw when car is off
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Subject HUGE current draw when car is off
     
Posted by Technomancer on June 08, 2008 at 7:27 PM
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Message Hi gang,

I don't have to ask for help very often, but I'm at a real loss here. With the car shut off and the battery disconnected, I take a digital meter and get a reading of 8 amps draw when I put the meter in series from the negative post to the negative cable. (You know, the meter is in series with the battery in the circuit.) This is without the alarm activated, doors closed, key out of the ignition, lights off.

With the meter in place, I have pulled out all the fuses one by one with no change in amp draw. This is all the fuses in the block in the engine bay (and I pulled the relays one by one also...why not) and all the fuses in the driver's kick panel. I also pulled all the fusible links by the battery one by one and I'm still getting 8 amps of draw. For the driver's kick panel fuses, I had the door open and the cargo light wouldn't come on. I would pull a fuse and then press the door-open sensor button. No change in amps, before or after the button push, before or after the fuse pull.

You would think an 8 amp draw would be easy to find! Heck, most fuses are set to burn up at 10 amps. But I can't find the draw. Can anybody think of a circuit that I didn't check with the above tests? I'm stumped.

The Z developed this problem over the course of years. When I first bought it, I could park it for the winter and fire it up in the spring with no battery charger. In the past 4 years, the Z would sit for shorter and shorter periods before it wouldn't start. It's been good for just a week this year, until this month. Now it won't even sit overnight without draining the battery. And I don't know what's doing it.

Any ideas?

- John


     
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