Car starts and when let e brake off all lights in dash and headlights dim and radio shuts off..alternator is good, had it tested
Those are all symptom,s of a low system voltage condition, so you had better get a 2nd opinion on the Alternator, I strongly suggest you seek out a dealer service dept for help.
SOURCE: 2003 Chevy Impala - radio, instrument
There are two possible cause of dim display.
On the deluxe trim level of the Impala the is light sensor. When the sensor mis-calibrated the light will not be at the level you want.
As a test,use a small flash light and aim to the sensor and see is the circuit act according it.
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The dimmer light is a VERY CHEAP component. I will glow it out with compress air 1st. Turn the dial back and forth 20-30 time in rapid motion will help remove unwanted carbon,
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Use a eletrical contact cleaner to clean all contacts.
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Is the headlight in OEM specification?
After market headlights may draw more amperage and cause low power for smaller bulbs.
SOURCE: i have a 2001 chevy cavalier z24..my headlights
Change the head light switch.
Testimonial: "Thank you Hope it works"
SOURCE: 2002 chevy malibu-lights dim occasionally
hello friend youre problem probobly cause by losing ground so check it out...enjoy youre car
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