Battery Dead after a few days.

[Gav240z]

Thanks for the advise I'll have a crack at those ideas soon.

[ezzzzzzz]

So many ideas... Go down to your local Radio Shack, Lowes, Home Depot, etc. and spend a few dollars on a cheap digital multimeter. Read the instructions. With the ignition off and all accessories off (lights, stereo, etc.) remove the negative cable from the battery. Set the multimeter to it's highest amp range. Place the multimeter leads between the negative cable and the negative post of the battery. Polarity doesn't matter here but you can put the black lead to the battery for giggles. The meter will indicate the amperage draw. You should have to turn the range down lower until you get an accurate current draw. It should be around 25-45 milliamp in your old Z. If it is upwards of .75 or higher then you need to find the source of the excess draw. First, disconnect the stereo components (remove fuses) one at a time. If the current draw drops to the 25-45 milliamp range you've found your drain. If it does not then continue on pulling fuses at the fuse box, one at a time, watching the multimeter for current drop. You'll find the culprit. If the problem occured after the stereo install I'm suspecting that you've miswired something between that equipment and the original harness. The stereo should not cause the drain. The only real drain is the dash clock and the memory in the head unit...that is in the25-75 milliamp range I refer to.