The entire backlight or taillight does not come on when driving at night. the headlight comes on but the parking does not. The brakelight and the reverse light are okay. it is just that back light does nt come on for night driving.

Do the reverse lights operate normally with the headlights off? The reverse lights are on an entirely different circuit than than the park/headlights. In order for them to come on with the park/headlights, there will have to be a short to power on the circuit. Will the park lights come on if the vehicle is put in reverse with the headlight switch off? Look for shorted/corrodded wiring in the rear taillight circuit and connector plugs. Green corrossion in/around any plug or wiring is a sure sign of a problem

Backlight switch under the brake pedal

Sounds like your lights switch is coming apart. Recommend you remove the switch and test it with an ohmmeter. To remove the switch, pull the knob straight off, reach behind the dash and push in the 3 tabs (top, left, and right side) holding the switch in, pull the switch back under the dash, and remove the connector. To test, use the pinouts shown on the diagram below and the switch pictured. Basically, pin 2 should have 1.2 Kohm resistance to pin 7 in the OFF position and no continuity elsewhere. Similarly, in PARK, pin 2 should have 1.2 Kohm to pin 8 and no continuity elsewhere. In the HEAD position, pin 2 should have 1.2 Kohm to pin 4 and none elsewhere.

If the switch has failed as I suspect, you will find that in the OFF position, pin 2 will have 1.2 Kohm to pin 8 rather than pin 7.
Let me know if you have questions.

try changing your break light switch at the back of the pedal

Have you verified that all the ground wires are good?

You have a bad ground conection.Remove the plug from the lamp unit.Check and clean with WD 40.Make sure that the bulb holders have not rusted away.If so replace.

the stratus' are well known for the brakelight switch on the brake pedal going out frequently!!
so go to nearest parts house and buy a brakelight switch, that will most likely fix your problem!!
:-)

if everything else works in the past I have had this problem and it was the headlight switch assembly itself

check the fuse that are labeled park lights or tail lights.

tnx 4 using fixya,

drcool

Check the electrical grounds for the taillights. In fact, get a diagram and check all the easily accessible grounds. Many of these are in the engine bay.

Dan