2006 Infiniti G35

Electrical problem
2006 Infiniti G35 6 cyl Two Wheel Drive Automatic 12000 miles

I recently replaced the battery in my car, and now it is not getting any juice at all; no lites no horn no nothing. I just consulted th owners manuel, and it said before you disconnect the battery all the windows should be up and the doors should be locked. Well I did not do that. I replaced a few batteries, and never had any problem. Is there any thing I can try solve the problem, besides have it towed to the dealer.
thanks scott.
September 1, 2009.

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