Possible shorted transmission harness or transmission shift solenoids. Disconnect the big connector at the transmission under the car and see if the short stops and fuses don't go.
Check all Ground Points. Battery cables can look good but not be. You should use a DVOM to check for voltage drops from battery to where ever the grounds go to. Also use the DVOM to check the battery cable terminal and post. Put one lead on the battery post and the other on the cable terminal. The DVOM should read 0 or very close to it.
Use amp meter between battery ground and disconnected wire to read drain. Next, pull one fuse at a time to see which circuit has the drain, and also try feeling the top of all relays to see if one is warm even thou everything is turned off. Stuck relay is common issue. If you find a fuse that stops the drain, troubleshoot that circuit to find fault. Think of things such as glove box door latch misadjusted that might make light stay on.
If you can smell,then you have a leak,if the heater core has a pin hole,then the box that houses it will hold the antifreeze to wear you won't see any,have to take the box apart and see,check your hoses going thru the firewall to see if there leaking.
? 3:00www.youtube.com/watch?v=BqyUIN1EWvINov 14, 2011 - Uploaded by NJ LIFE-HACKER
Hey man I got a 2000 maxima when I first turn the key on or start the .... 2004 nissan sentra 1.8 automatic transmission i did the diagnostic like in video and same results as you tranny is good. But the reverse gear does not work and i have lost power. .....2000 maxima/i30 transmission solenoid no 3rd&4th!
you have air in the system , a leak and possibly worn brakes. You need to takr immediate action as to drive a vehicle in this condition is hazardous to yourself and other road users
Also, maybe the servo is involved
