Usually the ground wire that comes out of the headlight that is fastened to the car body is the culprit. You will usually find the wire terminal from the headlight plug attaching to the car body or chassis ground not too far from the headlight. Fairly common problem.
The only way to fix the dimmer switch is to replace it I have tried cleaning it lubercating it. nothing will fix it for good .so i had to replace it. It is a factory item.
If it's a Sunfire, go to the dealer. I think they were recalled for that problem.
Replace your dimmer switch and this should fix your problem Or both bulbs could be bad
rewire them.
Duct tape
Don't try and clean them ...just replace why should i try not to fix it myself it is cheaper
You just need to change the bulb!
What are the headlights doing? Is the bulb burned out? Are the lights not coming on at all? Are they misaligned?
Check dimmer switch.
pop the hood and look beside your headlights on the inner side of them, there should be a a little round cap type thing with an arrow on it. remove this cap and turn the dial, this is the manual way to raise and lower the headlights
You should fix your treadmill if it does not cost more to fix than it does to buy a new one. If it costs more than half, than you should just get a new one and make sure it got warranty.
Plastic is sun damaged. Replace them.