The 2000 LS1, being the first year of the L-series, has had quite a few minor problems like that. That is caused by some of the wiring being chafed, and Saturn issued a recall in 2003 to fix this, and a few other problems with the car. The problem with the lights and blinker usually only occurs if you live in a humid area.
show warning lights and what they mean on 97 Saturn
Shutting off unused lights.
Hard starts and under powered may stall at stop lights.
Which lights are lit? What do they say? There are many warning lights
Check the ground wire to the tail lights.
Maby short in harness along rocker panels or on trunk......take trim loose turn on dash and tail lights and start jiggling harness wires. Moisture can cause problems like this as well.....
Short in system? Circuit breaker is resetting?
I have a Saturn 2001 300 L . The lights on the inside of car wont work.
First you have locate the knob or the dial controls. This is what brightens the lights on your dashboard. Then you need to check the fuse that controls the dashboard lights. Most of the time the fuse needs a simple replacement.
on my 1996 Saturn it was a blown fuse under my hood my headlights worked, but the lcd light or my back lights on my car didnt work.
see saturnfans.com
where in the left fuse box ,interior courtesy lights, amp-color