Question about 2002 Chevrolet Impala

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I replaced one headlight on my chevy impala but it stay dim even when turned on at night

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  • Master
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Check the connection and see if it corroded or melted.Corrosion will inhibit the proper voltage from getting to the light and will cause one light to be dimmer then the other.If it is heavily corroded consider replacing the pigtail plug that runs to the light. Your local dealership should have these in stock and are relatively inexpensive.

Posted on May 28, 2010

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  • Chevrolet Master
  • 6,826 Answers

Check the ground to the head light,make sure it is grounding good,also check the connector to the bulb,wiggle it around to see if it trys to brighten up.

Posted on May 28, 2010

  • Robert Veldman
    Robert Veldman Jun 06, 2010

    I also vote for a bad ground connection. Look for the 10mm bolt near the headlight, connecting to the radiator support. The ground wire is probably less than 10 inches long from the headlight.

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Hello, I'm having an issue with my headlight. For almost a year now I do not have a dim (low) headlight on my passenger side of my 2002 Chevy Impala. My Impala has over 140,000 miles and a 3.4 Engine


If the relay were the problem both sides wouldn't work . Do you know how to do automotive electrical testing ? How to read a wiring diagram ? You can view wiring diagrams here http://www.bbbind.com/free_tsb.html Enter your vehicle info. year , make , model , engine size . Then under system click on lighting , then subsystem click headlamps . Click on the search button , then on the blue links one at a time . At the top of the first diagram you will see the fuse's for low an high beams . The fuse's send B+ voltage directly to the high an low beams , from there B+ voltage goes on to the dimmer switch shown on the next diagram .Low beam headlamps from the dimmer swich goes through the headlamp relay when energized by the BCM . When the relay is energized that compleats the circuit to ground at G- 201 . So you see if one side is working it can't be the relay . Doing electrical testing , voltage drop testing is the way to find the problem .
Mastering Voltage Drop Testing with Pete Meier and Jerry Truglia
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Mar 13, 2017 | 2002 Chevrolet Impala

1 Answer

I have a 2005 chevy Impala SS and my high and low beams go on at the same time and three of them are dim.


Hello! The "Flash to pass" switch in the Headlight dimmer switch is the most probable cause...When it is activated it turns off the low beams...The dimness can be attributed to a resistive ground in that circuit...but one thing at a time...The turn signal multifunction switch contains the flash to pass switch...Therefore you would replace the multifunction switch...See picture below...Guru...saailer
6_9_2012_6_12_22_pm.jpg

OE PRO Part # SM260A ...Cost $150

Jun 09, 2012 | 2002 Chevrolet Impala

3 Answers

Where is the starter located on a 2007 Chevy Impala? It just clicks when I turn it on and lights barely turn on and the air will turn on only when trying to jump the battery. Engine didn't turn on even...


Check the battery like this:
Turn on the headlights, then try to start the car.
If the headlights do not dim or go out, then the battery is likely ok.
Check that the battery cable plus post, goes to the starter, Minus post to a good ground, like the engine.
If wiring is ok, then look at the starter solenoid for a good connection.
Problem is most likely the Solenoid or starting relay, whichever the car uses.
Hope this helps.

Sep 24, 2011 | 2007 Chevrolet Impala LS Sedan New Cars

2 Answers

Moisture in headlights. how to remove?


Here's a great video that will show you exactly hos to remove the headlights in your 97-05 Chevy Venture">

Nov 24, 2010 | 2004 Chevrolet Venture Passanger

2 Answers

Headlights go out when driven at night sometime 3/4 times in 10 min Please help!!!


replace the headlight relay in the engine compartment relay box.

Oct 11, 2010 | 2005 Chevrolet Impala

1 Answer

Dim instrument cluster at night and no tail lights


its probly a bad alternator i noticed that even the smallest of electrical problems can be traced back to the alternator it might not be bad yet but it could go any time

Apr 04, 2010 | 2004 Chevrolet Impala

1 Answer

2003 Chevy Impala - radio, instrument lights/displays go very, very dim when headlight turn on (auto on feature...sensor on dash). Turning dimming knob up does not help.


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.



Jul 16, 2009 | 2003 Chevrolet Impala

1 Answer

My 2001 Chevy Imapla headlights stop working.


check the fuses for the lights or it might be the dimmer switch check at autozone

Feb 26, 2009 | 2001 Chevrolet Impala

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