MPH Light in C5
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Joined: Jun 2005
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From: Paramus NJ
MPH Light in C5
New owner of 2000 C5. Runs great but I am confused by the MPH light in the center of the speedometer. It lights up after the car is warmed up and stays lit, but will then go dark only to return a little while later. Thought it was part of the active driving but could not find any reference in the manual. Am I missing something? And why would it come on and then go off at times??
Le Mans Master
Joined: Sep 1999
Posts: 7,393
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From: Los Angeles CA
Originally Posted by pfp972
New owner of 2000 C5. Runs great but I am confused by the MPH light in the center of the speedometer. It lights up after the car is warmed up and stays lit, but will then go dark only to return a little while later. Thought it was part of the active driving but could not find any reference in the manual. Am I missing something? And why would it come on and then go off at times??
Le Mans Master
Joined: Aug 2001
Posts: 7,064
Likes: 18
From: Arizona
Their isnt a light behind it.... I had my cluster apart to install my guage bezels and there are 2x 3" blue bulbs in the sides of the cluster. Your guages will appear to be lighter or darker if your guages are in direct sunlight.
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Joined: Jun 2005
Posts: 64
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From: Paramus NJ
Thanks... I will check that out but it seemed to be very visible when I was sitting still in the same place. Is this something to do with the active handling and the dash lights being on?? 
Drifting
Joined: May 2000
Posts: 1,917
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From: Southern NH
Originally Posted by ICULUKN-C5
Their isnt a light behind it.... I had my cluster apart to install my guage bezels and there are 2x 3" blue bulbs in the sides of the cluster. Your guages will appear to be lighter or darker if your guages are in direct sunlight.
The small photosensor on the top of the DIC buttons controls the intensity of the illumination - I believe it's Brighter in the sunlight and Dimmer at night.
Here's the excerpt from the 2K owner's manual (pg. 2-73):
Speedometer and Odometer
Your speedometer lets you see your speed in either miles
per hour (mph) or kilometers per hour (km/h).
You may note that there are not two separate scales
for mph and km/h. When you press the E/M
(English/metric) button on the Driver Information
Center (DIC), the cluster will calculate the proper speed
and move the needle to the correct position. Either the
MPH or the km/h telltale will illuminate, depending on
which measurement you choose.
