I HAVE AN 02 IMPALA AND MY INSTRUMENT LIGHTS AND TAIL LIGHTS DONT WORK WHEN I TURN ON THE HEAD LIGHTS

Check 20Amp LP Park Fuse in Underhood Fuse Block (mounted to right strut tower) Check 15Amp Tail Lic. Lamp Fuse In IP Fuse Block.

Get schematic to best resolve the issue.

have you checked the tail light fuse let me know and give more info

Look at fuse #18, a 15 amp fuse, in the fuse block. This fuse powers both the tail lights and instrument cluster lights. Usually both of these light systems are powered by the same fuse so when your cluster isn't lit up you'll know right away that your tail lights aren't working as it's not safe to drive without tail lights. Your brake, turn, and head lamps are powered by different circuits. Hope this helps and good luck!

there is a connector that plugs into the light that should be looked at. is there any water leaks anywhere. there were problems with water leaks on some malibu models around the tail lights. pell open the inside covers and get to the tail light to inspect for this. also check those bulbs just in case they did go bad. any condensation in the light? not sure if the Impala has a single fuse for both tail light or one for each but you should check fuse box under dash and under the hood. good luck

Chk. fuse, there both on same curcit.

check the condition of the light switch they are famous for overheating and melting

if it is only your tail and instrument lights you need to replace your park light fuse in the fuse box...

The Dash and Tail lights connect to the same fuse in most cars. if the fuse is okay, check to make sure the tail lights and/or dash lights are properly grounded. all bulbs could be blown...but highly unlikely.