Rep Power: 0

Started 6 months ago in Missouri winter. The car is 18yrs old.
Sometimes all of the gauges and indicators work perfectly and other times it does the following...
Issues:

• ABS Light
• SRS Light
• Engine Light
• Emergency Break Light
• Engine Temp doesn't work
• Speedometer doesn't work
• Tachometer doesn't work
• Odometer doesn't work
• Air Cond doesn't work
• No gear indicator light visible

The Air Cond only works like 1% of the time, thinking the compressor isn't turning on due to wiring issue.
Fuses are okay under hood and under dash.
I also believe I smelt electrical burning up about two months ago.
There have been two times within the last 4 months that the car has not wanted to start in the Walmart Parking lot. Turn the key and doesn't start, turn over again and car starts but like doesn't fully engage and audibly dies, third time turning the key the car starts and is drivable.
Car randomly goes from working to all of the issues being present at once. Instantaneous switch, and can happen multiple times while driving. Happens when driving over potholes/bumps for sure.


Separate issue, I am replacing the Transmission Pressure Sensor associated with the 3rd clutch (or whatever the real name of the sensor is). Replacing because before all of the current issues, I was seeing a blinking D light (gear indicator).

 
Rep Power: 0

OG thread poster here...
I have considered the following issues:

• Bad grounds, ✓
• Bad alternator, ✓
• Bad battery, ✓ 2.5yrs old but multi meter shows it's okay
• Blown fuses, ✓
• Bad gauge cluster
• Bad ECU
• Wiring issue