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Our dash instruments and radio screen went extremely dim on our 2014 Impala.

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  • Cars & Trucks Master
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Replace the thumbwheel dimmer control on the dash.
see wiring diagram at link below.
http://www.revbase.com/BBBMotor/Wd/DownloadPdf?id=1050066

Posted on Aug 13, 2017

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Posted on Jan 02, 2017

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Mustgo
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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.

====
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,

===
Use a eletrical contact cleaner to clean all contacts.
===
Is the headlight in OEM specification?

After market headlights may draw more amperage and cause low power for smaller bulbs.



Posted on Jul 16, 2009

  • 7 Answers

SOURCE: Dash instruments and radio not working. Dash

its probably the ignition switch. all the power runs through it and carbon builds up on the connections. look here http://www.clubgp.com/newforum

Posted on Aug 07, 2009

  • 1 Answer

SOURCE: dash and radio lights dim then get bright and then

wht ??

Posted on Jul 05, 2010

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1 Answer

What would cause instrument and radio light to dim


With the lights on auto, the dash will dim when the lights go on, based on the dimmer setting. If it's set low [wheel] they will be really dim. If it's light outside it will be hard to read. there are not many other causes other than a low battery or bad alternator.

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I have an 2002 chevrolet Ls impala with 3.8 liter when the headlights are on the dash lights are off the radio lights are really dim. I just bought the car was not told about the light problem is there an...


Turn you headlights on and see if you can twist the headlight switch clockwise. Your dash lights have the ability to be dimmed for driver preference

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1 Answer

My dash lights and radio lights blink from bright


It sounds like a poor Ground connection, Start by checking the connector that connects to the Instrument Cluster then see if one wire is terminated to the Metal components of the Dash Board. This would be the Master Ground connection for ALL Instrument lights and typically would include any other Lights on the Same Circuit. You will most likely find a loose sheet metal screw making this Ground Connection. With a high resistance connection the lights would be somewhat dim. If they flash between Dim and Bright it is an intermittent connection causing it. Almost always this will be found to be a loose screw connecting the Ground to the Chassis.

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2003 Chevy Impala daylight running lamps turning off on their own


normal condition lamp sensor on top of instrument panel turns lamps on and off with lighting conditions when headlamps are on dash lights are on whwn drl,s are on dash lamps are off

Oct 02, 2009 | 2002 Chevrolet TrailBlazer

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.

====
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,

===
Use a eletrical contact cleaner to clean all contacts.
===
Is the headlight in OEM specification?

After market headlights may draw more amperage and cause low power for smaller bulbs.



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1 Answer

2002 chevy impala won't start...


Check battery with a volt meter and see what kind of volts are in there. (should be at least 12) If lower, re-charge battery and clean terminals. (make sure you know radio code before removing terminal ends, and how to restore radio). Quick way to check battery is to leave the door open and look at the dome light, If it dims substantially when you attempt to crank engine, battery is likely low.

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2 Answers

The lights on the instrument panels as well as the radio flash at intermittent intervals. There seems to be no rhyme or reason as to when this happens (i.e. hot or cold car, bumps or no bumps, turns or no...


I had intermittent instrument light problem that went dark for months, until today. :o) I read somewhere that it could be the dimmer switch and didn't think that was my problem as the dimmer worked (dimmed the radio and transmission indicator light) and playing with it never seemed to help with the problem. I did find it odd that dimmer was not completely linear, as it would get brighter up to a certain point and get slightly dimmer with the last little bit of travel.

Today, I took the instrument cluster apart to fix a broken clock, sticking gas & voltage gauges, and to explore the instrument light problem. I took apart the dimmer switch, and to my surprise (was expecting a simple POT), it was a very complicated PCB with some IC's, resistors, transistors, etc. I thought, "all this just to dim the light???" Anyway, I found the POT (potentiometer) and gave a few squirts of WD-40 and found it turning smoother. After putting it back together, the instrument light came back and the dimmer is now perfectly linear. Apparently, less than perfect POT causes some sort of funny logic through the network of IC's and transistors and can cause the instrument light to go on or off randomly at certain intervals.

Anyway, I'm so happy to have the light back along with a working clock and not having to punch the instrument cluster to see how much fuel I have. Not really a posting type, but wanted to help someone else out there with a similar problem with same cause.

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