2003 pontiac sunfire..fixed broken ground wire, lites worked great for 2 weeks..now right, passenger side stays bright, left side stays dim...no difference when head lites are switched on, if you turn bright on, wrench service lite on panel comes on

SOURCE: Headlight one side works on bright the other side works on dim

Try swapping the headlight bulbs or buying a known good bulb and testing that way. Sounds like a shorted bulb filament issue.

SOURCE: one headlight lit normal the other is very dim

Switch the lights and see if it is still that side. If it is dim on the other, then it is the headlight itself. If the same side is dim, then check you voltage on wires on both sides and see if you are getting enough on that side. Hope this helps some.

SOURCE: lights will not turn off, brights blue lite on all

Your turn signal/headlight multifunction switch has failed.

To replace it, remove the four screws from the bottom of the steering column cover, split the cover apart.
Unplug the one connector out of the bottom of the headlight switch, then depress the two levers, on top and bottom of the switch housing, and slide the switch out.
Install in reverse order.

SOURCE: service lite goes on a 2001 pontiac sunfire

so its a sensor thought if my service lights on

SOURCE: have a 2003 pontiac sunfire,both headlight bulbs

Check for corrosion around the battery terminals. Make sure that the terminal connections are clean and tight. Verify that the battery is good and is keeping its charge.