I have similar problem but some symptoms are different than you described.
It's hard to explain all the issues that I'm having, the passenger rear light
used to remain on all the time even when car is parked and not running.

This morning I disconnected the negative 1st, and removed the entire
battery and took it to Autozone for testing. However the 1st test revealed
bad battery, and tried a 2nd time, test revealed Good Battery but reached near of Battery's life. Otherwise, there are no sign of weakness for the
Battery, it starts the car right up anytime no problem, even after lights
remain on for several hours.

I also tried the sun visor test but unfortunately didn't show anything
different. Right now, I don't have any signal on both sides,
1-Right side lic. plate light and right rear remain on
2-No seat belt indicator light on dashboard
3-Both head lights/rear lights are blinking with dashboard like a police car
even when key is out of the ignition or while driving.

Before, all accessories inside used to work great no problem
but now they begin to mess up. My dashboard light is also blinking
all alone with the headlight.
sometime I have my seat belt attached correctly but indicator light
shows seat belt light illuminated on dashboard.

What could it be Folks?? I'm going crazy......

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