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Maintenance & Repair 350Z up keep and diagnosing/fixing problems

Amp draw on 04 350z

Old Nov 8, 2011 | 03:02 PM
  #1  
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TunnyZ
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Default Amp draw on 04 350z

So far:

1. Battery is brand new
2. Alternator tested good at Autozone
3. Starter tested good at Autozone
4. Current draw is all the way up to .6 amps!

I'm going to have a local shop run an electrical diagnostic test to see if they can tell me where I should start looking. I have an amp with subs/in dash dvd monitor/alarm system with auto start ect... so I'm not sure where to start.

Can a loosed wire to an amp be causing the problem? Also, what should I be looking for first? What fuses should i pull in order to pinpoint what could be wrong?

One other thing I have noticed:

My window motors are kind of shady. By that I mean you have to tap the door to get them to work sometimes. I know window motors are a big problem with the Z's so I'm not sure how worries I should be about that being the problem. Any help or advice would help alot.

Right now I have just disconnected the battery while it sits. The alternator will charge it up while it runs anyway. Is this ok for a couple weeks while I try and pinpoint what is wrong. I don't see why it would be a problem, but better to ask than assume.

Thanks in advance!
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Old Nov 9, 2011 | 02:00 PM
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The problem is my battery keeps dying after it sits for a week... I figured that was a given.

As I stated before everything else big has been tested and checked good. I bought a new battery because my old one had a dead cell in it. That battery I bought lasted 3 weeks and it was dead. So as it sits now...

1. I bought brand new battery.
2. Alternator/starter/battery are all good.
3. My battery will die if it sits for a week or so, I figured it was because I have .6 - .7 Amps being drawn while the car is off.

So, I ask yet again...

Short of pulling fuses and ohming everything out, where should i start? Something with that kind of amp draw probably isn't very big, but it is draining my battery as far as I can tell. No lights are being left on, ground wires for battery and engine are tight, and I pulled fuses for my amp and subs and there is still the same amount of draw on the battery while the car is off.

Any help is appreciated, sorry if I was unclear as to what my problem was.
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Old Nov 9, 2011 | 02:46 PM
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Remove fuses one at a time, and put the leads from your ampmeter into each fuse receptacle until you find the circuit that's drawing excessive current.

There are several circuits that remain hot while the car is OFF, but most of them won't draw any power unless you do something to activate them. The exceptions are the receiver for the key fob transmitter and the security system. They're going to draw a little power all the time, but it shouldn't be anywhere near 0.6 amps.
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Old Nov 9, 2011 | 03:49 PM
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Rrough guess is that your amp is not turning off when it is supposed to.

You have measured the current. 0.6 Amps. Start disconnecting after-market shiz until the current drops.
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