If by "dim headlights" you mean low-beams... the bulbs are bad and must be replaced.
If the engine isn't running, the battery is low. If the engine is running, the alternator probably has a problem. If you are wearing dark sunglasses, remove them and the lights will get brighter. good luck!
Possible ground issue at the taillights.
i think, depending on the year, that problem is caused by a factory defect.
Most likely a fuse.
A bad ground wire will cause dim headlights, or will cause lights not to work.
there should be a fuse under the hood or under your fuse block that probably blew
probably the fuse is blown.
there is a number of things that could cause this. here are a few easy ones to check. is the e-brake fully disengaged. are the bulbs burnt out. is the wiring harness plugged into the daytime lights bulbs and in good condition. if these check out, you may have a fault in the daytime running light module.
When i was trying to disable my DRL's (Daytime Running Lights) i pulled the fuse for them and my headlights and instrument lights were flashing intermittently. Check the fuse panel in the glove box and look for the DRL fuse. Check if its blown. Hope this helps!!!
Headlights run off the battery not the ignition...
your car sucks!
On a 1999 GEO Tracker, a bad fuse can cause the headlights and dash lights to blink. A bad voltage regulator or alternator can also cause lights to blink and flicker.