300ZX (Z31) Forums Dedicated to 84-89 ZCars otherwize known as the Z31's

Weird Battery Drain

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Old 02-17-2009, 05:25 PM
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Weird Battery Drain

Man somebody please help me. Ok heres the story. I bought a 86 300zx (t) and it didnt have a battery so i couldnt start it. So i got a battery and the windows or none of the lights (headlights, side markers, interior, or taillights) work and the headlights would flip up and down continuly when I tried the headlight switch. So I found some bad fuses and replaced them. So I put the battery in the car and the battery voltage instantly drained. I mean I watched the voltage go from 12.4 volts to 6.5 volt in a matter of seconds. I cant figure out where to even start to look. Please somebody tell me what to do. Any and all help will do. Thanx

Last edited by MistaZ31Turbo; 03-12-2009 at 07:26 PM.
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Old 02-21-2009, 07:25 PM
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you got some kinda big short if your battery drops that fast. be sure it is fully charged. I'd also get the battery load tested they do it for free. I got a bad new battery and couldn't figure out the weird stuff the car did. load test showed it bad and they replaced under warranty. everything worked fine after that.
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Old 03-12-2009, 07:28 PM
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Still having issues....I still cant figure this our. I was thinking maybe the diode are bad but I cant find them.
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Old 03-14-2009, 04:33 PM
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Find out what the problem was......the battery was bad. Got it replaced
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Old 05-23-2011, 12:28 PM
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old thread. i know

My battery is draining while my 86 turbo is off.

The battery is almost 6 months old, but I know its good, it holds a charge. But my z is not registered yet so I do not run the engine or drive it often. I'm currently doing some maintenance before I register and drive it everyday (so it don't crap on me).

About 2 weeks ago I turned it on for the first time in about a week, and the battery was dead. So I jumped her and drove her around and watched the dash voltage build quickly and stabilze. I shut her off and she started the next day. And then I skipped a couple days and went to turn her on and the battery was dead again.

Something is draining her battery, and there are a lot of plugs with no mate, and wires that seem to just simply have been cut. Culd this be causing a drain on the battery?

Help!!
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