C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

'93 Speedometer backlight dimmed.

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Old Nov 9, 2001 | 09:11 PM
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St. Jude Donor '03-'04
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Default '93 Speedometer backlight dimmed.

The speedometer panel on my '93 coupe suddenly seems about half as bright as it used to be.

Also, I've completely lost the backlight on my radio clock/frequency display.

Is the LCD lit separately by replaceable bulbs? Has anyone has this problem and repaired it?

~Matt
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Old Nov 9, 2001 | 09:59 PM
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Default Re: '93 Speedometer backlight dimmed. (Matt Black)

I have the same problem on my 93 at times but the radio display stays the same just the spenometer display dimming. :cry :cry
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Old Nov 10, 2001 | 01:36 AM
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Default Re: '93 Speedometer backlight dimmed. (Matt Black)

Shine a bright light at the ambient light sensor opening (on the drivers information center) and see if anything changes. If nothing changes you'll need to follow the ambient light sensor functional check list (long). Page 8A-114-9 in the 92 manual, should be the same on the 93. :crazy:
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Old Nov 10, 2001 | 01:55 AM
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St. Jude Donor '03-'04
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Default Re: '93 Speedometer backlight dimmed. (Ramrod92)

Running to find a flashlight now...hmm...it should be dimmer in darkness, brighter in daylight, what a concept...:D

Wait a minute, tho...it's at *night* that it seems to be dimmer than it should be. Have to crank the slider all the way up, when halfway used to be too bright.

Thanks. I'll be beck.


[Modified by Matt Black, 11:57 PM 11/9/2001]
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Old Nov 10, 2001 | 03:41 PM
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Default Re: '93 Speedometer backlight dimmed. (Matt Black)

Okay, no help. It responds as it should lights on / lights off / dark / light.

My service manual does show two lightbulbs for backlight. I wager I've lost one of the buggers.

~Matt
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