Problems lexus a warning bell goes off when driver door open

Assuming the warning is for the key in the ignition, the problem could be the sensor inside the steering lock cylinder.

I would try to fix the door a simple weld or used parts at junk yard. rodger.....

one of the door switches has failed and the BCM is still seeing there is a door open.

try changing fuses any way somtimes there dirty or coroted and dont make good contact even though they test good and look good still could be the problem

I am having the same problem. I am thinking it is a sign of the alternator going out. The light and bell sounds also sounded when I pressed the door lock button to lock or open the doors.

I'm assuming that the key is removed from the ignition and it's still chiming..
Take some lock lube spray and spray a bit in your ignition key slot. Then take the key and insert it in and out a few times. This may release a stuck contact in the ign. switch.
The chime will also sound if the lights are left on...worth a check too.
These are cheap fix/checks...hope they help.
k

sounds like the relay for the doors is stuck or faulty.... you can locate the relay in the fuse panel under the dash .... replace it and it should be fine

Sounds like your door sensors are going bad and are not relaying to the computer that the doors are fully closed, with that being said you will need to replace them and also at the same time it will stop the door locks from going crazy

Section 13-09: Gauges, Warning Devices — Chime System 1996 Windstar Workshop Manual
DESCRIPTION AND OPERATION Warning Chime Systems Three distinct sounds are used to indicate the area of concern. Seat belt warning generates 1 chime per second
key-in-ignition generates 2 chimes per second
headlight on generates 4 chimes per second.
Key-In-Ignition Warning The key-in-ignition warning will sound when the driver's front door (20125) is opened with the key in the ignition switch. It will continue to sound until the key is removed, the front door is closed, the ignition switch is turned to START or the vehicle speed is over 24 kmh (15 mph).

Safety Belt Warning When the ignition switch is turned to RUN or START from OFF or ACC, the chime will sound for six seconds or until the safety belt is buckled.

• The safety belt warning indicator lamp (10C859) will activate for 60 seconds or until the driver's safety belt is fastened. Both the chime and lamp activate at the same time.

Anytime the ignition switch is released from START and returns to RUN while the safety belt lamp or chime is activated, the safety belt warning lamp or chime will remain activated until either the timing sequence has been executed, or the safety belt is buckled.

Headlamp Switch On Warning The chime will be activated if the headlamps or parking lamps are ON, the key is not in the ignition and the driver's door is opened. The chime will sound at a rate of four per second.

the switch that shuts off the dome light and chime is part of the door latch and is broken