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This is the alternator problem. It is nor providing good charge at idle and at low rpm. Another sign of it can be whining. Reason is the diod bridge inside the alternator goes bad. But might be external reasons. For that check the serpentine belt, power cables coming from alternator for deposition/rust and battery and alternator for charge (in Autozone store for free). If battery discharged alternator goes bad.
Good Luck
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The dimmer switch only works when the headlights are on, When they are off there is a light sensor on the dash that takes over and adjusts the dash lights as needed. It sounds like yours has gone out.
this either a fuse that bew or your dimmer switch that makes the lights brighter and dimmer on the dash is turned down all the way if the fuse is good and it's nit turned down all the way then the bulbs are all blown or the dimmer switch is bad
you may have a bad alternator, bad battery, or simply dirty battery terminals. Clean the battery terminal connections with a battery terminal brush and reinstall. Check to see if that helps your problem. Usually this is an alternator problem. If the headlights get brighter when you rev the engine, then it's most likely the battery. But if the lights just get dimmer and dimmer, it's most likely the alternator. If the voltage gauge doesn't show proper voltage, 14 or more volts, alternator is probably the fault.
That is normal. They go bright because during the daytime the outside light is also bright so the lights compensate for the outside brightness by making your dash lights also bright. When you turn your headlights on it assumes it is nighttime and you don't need to have the brightness to see the dash lights so it compensates for this. If you want them to be dimmer, near the light switch there is a roller button to turn your interior lights on just roll that some and it will either make the dash lights brighter or dimmer.
I'm no expert, I recently purchased a 2003 vibe. I noticed the automatic headlight's sensors can be super-sensitive, about an hour hours before dusk they'll kick my headlights on (when the sun is still shining!), or sometimes when I go into an underpass, and then sometimes they'll realize it's light enough and turn themselves off. This would cause your dash lights to go to the 'headlights on' mode and turn the headlamp signal on, the intensity is controlled by the dimmer/dome light control on the left side of the dash. Check to see if the dimmer is down too far, as this could cause the lights to dim when the automatic headlights turn on. It's also possible that the dimmer is not working, thus no power is getting to the dash lights through the dimmer. Try testing it by starting the car in daylight, then manually turn on the headlights, then adjust the dimmer. Like I say, I'm no expert, just guessing because I've noticed it happen similarly on my Vibe, but my dimmer was at half-way, as I like it for night driving. Someday, I'd like to disable the automatic sensors and DRL.
headlights rlun on high beams at all times dimmer switch is designed to interupt the circuit so id say your problem would have to be at the dimmer switch check the plug and linkage
Thank's All
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