My 1994 Corvette dash lights are very hard to read in the daytime. I've owned the car for just a few months, so don't know if this is how they all are. All comments and advice is appreciated. TY

 

is the dial rotated up

 

You mean that dial on the right that says dimmer? I don't see it making any change in dash light intensity. What's it supposed to do?

 

Excuse me, on the left side

 

Hope it's not the incandescent power driver. That thing is a son of a gun to replace. I had to replace it last year whe nall of my button lights stopped working.

I don't know if/how it affects the cluster lights, though.

Some have had photocell issues. So I've read anyway. Dunno if that would cause it or not. Might...

 

Is the lcd screen the only portion that's dim or are the analog gauges dim as well?

 

Analog gauges are also weak....so is the radio clock...can barely read what time it is, even at night.

 

Also, I just noticed this morning, that when my dimmer switch is as low as possible, my interior lights shut off about 20 seconds after I close the doors. When the dimmer switch is fully "on", my interior lights won't shut off ever, and of course drains my battery. Any advice or comment?

 

That's how it's supposed to work.

When fully on it turns the interior lights on until you turn the switch back. Thn the interior lights will turn off.

Ideally, you want to turn the switch just until right before it clicks to the full on position.

 

Thank you so much Natty...I wouldn't have figured that out on my own. Doug K.

 

too bad car companies never supplied a book with every car to tell you how everything works

 

Shine a flashlight at the light sensor and see if it reacts. Your light sensor for the lighting may be bad.

 

Where exactly is the light sensor. I read it's in the driver info screen but am uncertain what the driver info screen is.

 

It's with the buttons for the DIC. Little dot photo resistor thing.

 

I assume DIC stands for driver information center. My car is out of reach for awhile now, but I remember buttons....about 5 of them. Will flashlight at these buttons when able, TY, Doug K.

 

There's a lot to unpack here.

Are you wearing polarized sunglasses? If so, ignore everything in this thread and first try reading them without the glasses.

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In the cluster, the LCD (speedo) backlighting is controlled by the CCM. The CCM responds to the tail lights being on, and somewhat to the photocell. I just tried my 92, and with the key on, tail lights off, the LCD responded very slightly to covering or shining a light in the photocell. With the tail lights on there was a greater difference between covering or shining a light. With the tail light on, the dimmer paddle made significant difference regardless of covering or lighting the photocell.

The analog gauges lighting is controlled by the headlights switch dimmer paddle through the "Incandescent Driver" that Natty mentioned. There is no influence by the photocell on the analog gauge backlighting.

The green LEDs above the buttons in the HVAC, fog light switch and radio are controlled by the CCM. My test results showed that the LED intensity followed the LCD intensity as described for the LCD backlighting.

My interpretation of the OP's symptoms (as long as he's not wearing polarizing sunglasses) regarding the LCD speedo and HVAC screen are that he has polarizing film problems, not a "lighting" per se problem. Yes, he includes the analog gauges as also being difficult to read, so perhaps he also has a incandescent driver problem as well. In bright sunlight I could still read the black numerals in the speedo with the back lighting almost zero. (Tail lights on, dimmer paddle at minimum, key on, photocell covered.) I've never tried this, but take a pair of polarizing glasses and view the numerals through them while rotating the glasses 90deg each way. If the film is bad, the glasses should restore the clarity when held in the correct orientation.

 

That's lots to think ab out, and I very much appreciate you spending time with me. I'll make use of your observations, and ty very much.