Good morning, where I can get the wiring diagram of alarm multifunction module and the cluster system of cavalier 99, thanks.

Your best method here is to buy a good quality workshop manual for your car. This will have all the diagrams you need.

Problem can be in the multifunction switch on the steering column (lever that selects high/low beam and turn signals), in the headlight switch itself, in the Timer Control Module (TCM, also called BCM - body control module), or in the wiring.
Get a wiring diagram and start troubleshooting! Good luck.

Sounds like you have lose connection , probably a ground wire under the dash . May mean pulling the instrument panel to find it . Ground 200 is ground point for instrument lights ,

G200
Right side of the IP, secured on the underside of the cross car beam, left of the heater-A/C vent
Harness Routing Views in Wiring Systems

Or the dimmer switch could have internal problems . If you want fix problems like this you need to learn automotive electrical testing an trouble shooting . There are good videos on youtube ! Electric Testing Techniques You Need to Know And how to read wiring diagrams . And buy a manual so you have componet location charts . How to read an electrical diagram Lesson 1

Does it ding with the seat belt latched ? if so you probably need a Multifunction Alarm Module or have a shorted wire . Was the vehicle in an accident ?

If it's the GAUGE fuse than there are a lot of components on this wire. The smarter thing to do before you replaced all that stuff would have been to unplug those items, install a fuse, turn the key on and see if it blows. Obviously at this point we know it would have. Since the rear defrost, DRL, audio alarm, ac relay, 4x4 system and keyless entry module shape this fuse it may be a good idea to to get yourself a good wiring diagram and a good volt meter to track down the shorted component or wire.

I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

Power Output Diagnostic Mode
You may use a power output diagnostic mode in the multifunction alarm module in order to run a quick test on the operation of the following outputs:
• The courtesy lamps control
• The inadvertent power control
The power output diagnostic mode activates after you perform all of following actions:
• Close all of the doors.
• Set the park brake.
• Turn the ignition switch to RUN.
Before 15 seconds pass, perform the following steps:
• Open the right front door.
• Cycle the headlamp switch from OFF to PARK three times.
During a normal operation, the multifunction alarm module will flash the interior lamps until the ignition switch turns OFF. If an internal short occurs in the multifunction alarm module, the module will chime in the following patterns:
• One chime every 3 seconds implies an inadvertent output failure.
• Two chimes every 3 seconds implies a courtesy output failure.

Now im not sure since the manual says your model has the same alarm system as the 328i and on the 328i you can remove the module to disable by doing the following. you can unplug the control module. It is located under the glove box. Climb under the dash on the passenger side and remove a few screws on the trim panel under the glove box. Theres a black control module with a green connector. There should be a lock tab on the connector. press the lock tab and pull out the connector. The alarm should now be disabled. But if it has the special transponder key this may not work.
But if the only reason you want to disable it is because of the motion sensor setting of the alarm for no reason there is a solution for this. To disable the motion sensor, hit the lock button to arm, then hit lock button again within four seconds to disable motion sensor. Red light on rearview mirror should flash four times, then pause, then start flashing on regular intervals. this is most likely the reason if your having the issue where the alarm goes off every 20 minutes.
If you want to completely remove it below is a wiring diagram taken from the manual for you alarm system.
this is from the manual its the alarm wiring diagram.
Battery Constant 12v Positive Wire ( ): Red/White or RedBattery Constant 12v Positive Wire Location: Ignition Switch Harness
Starter Positive Wire ( ): Black/Yellow or Black
Starter Positive Wire Location: Ignition Switch Harness
Ignition Positive Wire ( ): Green
Ignition Positive Wire Location: Ignition Switch Harness
Second Ignition Positive Wire ( ): Purple/White or Purple
Second Ignition Positive Wire Location: Ignition Switch Harness
Parking Light Positive Wire ( ): Gray/Purple and Gray/Yellow. Use Both Wires. This vehicle has a dual parking light system that will require 2 extra relays.
Parking Light Positive Wire Location: At Headlight Switch
Power Door Lock Positive Wire ( ): White/Red
Power Door Lock Positive Wire Location: At Factory Alarm Plug. The alarm plug is a black 12 pin plug located just behind the glove box.
Power Door Unlock Positive Wire ( ): Blue/Red
Power Door Unlock Positive Wire Location: At Factory Alarm Plug. The alarm plug is a black 12 pin plug located just behind the glove box.
Door Trigger Negative Wire (-): Brown/Gray
Door Trigger Negative Wire Location: At Factory Alarm Plug. The alarm plug is a black 12 pin plug located just behind the glove box.
Domelight Supervision Wire: Turns On With Unlock
Domelight Supervision Wire Location: N/A
Horn Negative Wire (-): Brown/Red or Brown/Yellow
Horn Negative Wire Location: At Steering Column Harness
Tachometer Wire Negative Wire (-): Black
Tachometer Wire Negative Wire Location: At Instrument Cluster
Brake Light Positive Wire ( ): Blue/Red or Green/Red
Brake Light Positive Wire Location: At Switch Above Brake Pedal
Factory Alarm Disarm Wire (-): Disarms With Factory Remote Only. Factory Alarm Disarm Wire Location: N/A
Factory Anti-Theft System: Transponder Anti-Theft System, Requires Bypass And Extra Ignition Key. The 1997 model year vehicle may require a bypass module and an extra ignition key, if vehicle is equipped with a special key from BMW.
Factory Anti-Theft System Location: Transponder At Ignition Switch Tumbler
if you require further assistance please let me know and i will help assist you from there. Thanks, Midwest-Tek

sounds like the fuse pannel under the hood blew a master fuse

If warning lamp does not go out:

• Switch ignition off.
• Remove instrument cluster:
• Connect test box to control module wiring harness.
• Check wire connection between test box socket 48 and instrument cluster for short circuit to Ground (GND) according to wiring diagram.
• Erase DTC memory of Engine Control Module (ECM). Generate readiness code. If no malfunctions are detected in wire from Engine Control Module (ECM) to warning lamp:
  
• Replace Motronic Engine Control Module -J220-.

You will also need to swap the speedo cluster. thats where the anti theft module is located. After that you may still need to relearn the key switch.I will look at the wiring diagrams and get back to you on the starter circut in side the vehicle. You may have to change some other things.Talk to ya soon. Dan