Does a soft sounding warning bell indicate a problem somewhere? Sometimes the bell is normal other times the bell is soft.(quiet) This is for a 2006 Chevrolet Impala.

It is probably warning you that it is cold enough to have ice on the road if there is moisture.

Go and check the rear left and right tail lights. take off connector and you'll notice that earth wire and pin is blown.

Might flash computer. Sounds like security is locking ignition out thinking something was stolen. This happens when car parts are changed sometimes.

Sounds like a sticky door switch.

Open the driver’s door. With a screwdriver or equivalent trip the latch on the door 2 clicks so it is in the locked position, just under that finger get a can of Brakecleen and hose the snot out of it. I mean really firehouse it. As fast as it evaporates I still had it running out of the door drains. Be careful not to get cleaner on the plastic door panel, trust me take extra care.
Open the outside door handle to release the latch, then open and shut the door for a while, like a few dozen times, to work the latch. Repeat as necessary. Follow up by shooting some PB Blaster, WD-40 or whatever light lube is handy.
If this doesn’t work, give it might take a day or so to work free. If still nothing then the micro switch might actually be broken, but this usually does the trick

sounds like a locating control is worn or damaged. Your description sounds like soenthing from the engine is touching the body, somewhere...this broadcasts noise normally insulated from the body.

Fast flashing is a warning that one of the bulbs is not working. if the front flasher d/side is out try changing the bulb and cleaning the terminals inside the unit.

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 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.

Usually. if it is a sending unit problem the sending unit will either read full all the time or empty all the time. If your's is reading correctly it's more likely that you have a short in the wiring, somewhere between the light and chime and the sending unit.