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2008 CTS
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1,192 Posts
Discussion Starter #1
Did anyone notice when in reverse the digital speedometer registers your speed while backing up. I never noticed this and a fellow STS owner pointed it out to me. I don't believe I ever had a car register speed in reverse.
 

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2003 STS w/BoseNav, 1993 Deville, 1985 Deville
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1,089 Posts
This is nothing new. My 93 Deville does that. Back it up and the needle moves up to register how fast you're going backwards. Oh....also the odometer ticks upwards, too.
 

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Unicycle
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11,009 Posts
Yup, nothing new....

back in the day when speedometers were cable driven, most did not move.

Since the mid 80's or so, when cars started getting speed sensors on the wheel and the speedo is electric, they register in reverse.

way to tell if it is electric or not... when you turn the key ON, the speedo should move a bit from the rest position to 0mph. My '89 Olds has an electronic speedo. They also got rid of the fluxuating speedo issue from a bad cable...

but yeah, nothing new :)
 
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