I have a 1999 maxima SE. I have owned the car for a few years and the rear door locks and rear windows have never worked. I tried a new drivers side switch, but it did not correct the issue. I have checked the fuses as it seems like it would be fuse related; but the fuses are all sound. there may be a relay for this but i have not found it, and the relay box i found under the hood does not explicitly mention this circuit.

Other things not working that may or not be related are the heated seats, and the cigarette lighter. Not sure it is relevant , but if they are somehow on the same circuit someone might see a connection. I have found other threads with semi similar problems, but none have a solution, were different, or people just stopped posting in the thread.


Any help would be appreciated. Thanks in advance


Note Moved from original place to make it easier for me to view a response. apparently the 15 post rule is no more. Sorry if double post.

 

Do the rear doors and window open using the rear switches?

If yes, then i would say there is a problem with the door relay.

If no. then u can try replacing the rear switches, but i dont think this is the best course of action as the front switch should work to open the rear. In this case, I think the relay is busted.

Dont know where its located tho, somewhere under the dash i believe.

 

the windows & door locks are one problem, the cigarette lighter is another and the heated seats are a third problem. They do not share fuses or relays. In fact, there are no relays that are unique to any of these devices.

The only thing that is in common with the heated seats and windows/locks is the wire harness. It could be damaged. The harness runs down along the driver's side outside on the floor. But I don't think the cigarette lighter wire is in the same harness as the doors and seats. The harness is enclosed in a plastic channel for protection, so it would take some force to damage it, like a car accident maybe?

Let's talk windows and door locks. The power for the windows and locks comes from the same source, Circuit Breaker #2. Since the front windows work, the circuit breaker is good. The windows and locks are computerized. There are 2 data busses that carry the commands, one for the left side and one for the right side of the car. A data buss controlls the front and rear door for its assigned side. The microprocessor that controlls the data busses is in the BCM (Body Control Module). The BCM is mounted on the so called "transmission hump" forward of the shift lever below the radio. It is possible that this is the problem but this is not much better than an educated guess. Disconnect the wire harness from a rear door window switch. Check for 12 volts on the white/red stripe wire (one of the corners). There is a black wire in the same row, second from the opposite end that is ground. Measure the voltage between the white/red and black wires. It is possible you have a bad switch. It would be unusual to have 2.

Heated seats - A heated seat consists of 2 sections, the seat back and the seat bottom. It is a heating pad and heating pads burn out. But all 4? Not that likely. Both seats get power from the same fuse, #29 (fuse panel, right column, 3rd from bottom). Start by pulling out a switch and see if you have 12 volts on the white wire when the ignition switch is in the ON position, not the ACC position. There is a black wire that is ground. Measure the voltage between the 2 wires.

Cigarette lighter - This gets its power from fuse #6 (fuse panel, left column, 6th from bottom). Check for 12 volts on the orange wire with the ignition switch in the ON or ACC position. The other wire is black and this is ground Measure between the 2 wires. If you have 12 volts, you need a new cigarette lighter.

Try these basic basic troubleshooting steps and see what you have.