water in the wiring or a low battery
There are several things that can cause your 2000 Cadillac dashboard lights to quit working. The most common cause is a blown fuse.
What would cause your fuse to blow when you turn on your lights on your 1993 mazda 323 the fuse to the tail lights on dash lights blow?
Check your fuses
Fuses
On a 1999 GEO Tracker, a bad fuse can cause the headlights and dash lights to blink. A bad voltage regulator or alternator can also cause lights to blink and flicker.
Check fuses, check for a failed (and possibly melted) headlight switch.
Bad dash ground.
Blinking lights on dash and exterior lights may indicate a bad ground wire or a faulty headlight switch. Both would cause those problems.
the dash and radio lights are supposed to dim when the headlights come on. Make sure you have the brightness of the dash lights turned up as much as possible.
Short
might be a fuse
Major engine failure?