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speed sensor wire

Old Dec 29, 2007 | 09:21 PM
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speed sensor wire

Ive got a 99 f150 that a pioneer d3 radio will be going in but have no clue which wire comming from the computer is the speed sensor wire. I was wondering if someone might know. Thanks
 
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Old Dec 30, 2007 | 08:46 AM
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Gray/Pink at one the stock radio connectors (if originally wired for premium sound.)

Steve
 
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Old Dec 30, 2007 | 01:24 PM
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Alright, I have got to know. Why does a radio need the speed sensor signal?
 
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Old Dec 30, 2007 | 01:39 PM
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Originally Posted by Franklin2
Alright, I have got to know. Why does a radio need the speed sensor signal?
gps/navigation
 
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Old Dec 30, 2007 | 04:33 PM
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And speed adjusted volumn control.
 
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Old Dec 30, 2007 | 05:19 PM
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Originally Posted by Ultraute
And speed adjusted volumn control.

Winner!

The marketing department weenies call it "speed sensitive volume control". Basically, it automatically turns the radio volume up to cover road noise.

Steve
 
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Old Dec 30, 2007 | 06:02 PM
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Commercial GPS units do not get your speed from your vehicle's speed sensor or an internal accelerometer; they calculate it over a constant time interval based on the distance travelled. In other words, the GPS figures it out on its own. Like the others said, the connection is for speed\volume control...I think it's a really cool feature.
 

Last edited by fmc400; Dec 30, 2007 at 06:05 PM.
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Old Dec 31, 2007 | 07:18 AM
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GPS units rely on satelite-transmitted data and don't need any VSS data to figure out where they are, how fast it's traveling, or anything else.

They're all self-contained except for power and perhaps an external receiving antenna. The computer is constantly recalculating based on current data being received.

Steve
 
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Old Feb 9, 2008 | 10:48 AM
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aftermarket gps units do use the vss to calculate position in betwean times when it is refrencing satalites fo r position, it makes them much more acurate
 
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