I will be installing an Eclipse in dash GPS/NAV unit in my 05 FEH shortly(I'm waiting for it to arrive) & it needs a connection to the speed sensor wire.

Does anyone have a wiring diagram that shows where this wire(location/color code etc)is located???

TIA,
~John

 

Sorry, I can't help but I do have a question:

Whay does a GPS system need a connection to the speed sensor? Every GPS I have used tells speed naturally as they are a GPS System.

Just curious,
dsd

 

John,

Audiovox makes a speed pulse detector ($30) that should work. New cars have this info on the CAN bus (ODBII) so there is no analog speed pulse wire. The audiovox unit(s) use a magnetic detector like those on the old add-on cruise control systems to generate the required pulse.

http://www.sjgreatdeals.com/avx2504165.html
http://www.bnotions.com/SPEED_PULSE_..._p/2504165.htm

There is also a CAN bus interface that will generate such a pulse, but it is expensive ($200) and requires a good installer.

http://www.soundgate.com/index.php?r...&usereferrer=1

I found these on the web by using Google - eclipse "speed pulse"

JeffD

 

dsd,

I had the same question so I went to the Eclipse site. They seem to use the speed pulse (after calibrating it via GPS) to get a more consistent reading on MPH.

JeffD

 

I have no idea why it needs it, I have three other NAV units & they don't need any "speed connection" hookup. I do know the Eclipse will operate with out it hooked up so I'm not real worried about it.

~John

 

I found the info I need.

~John

 

I believe that (like the factory unit) it can use speed info to maintain fairly accurate location if you lose satellite connection for some reason.

 

It needs the VSS wire for two reasons:

To "guess" where you are in tunnels ( real or urban, like downtown Chicago ) or when you are in Mountain valleys, and much of the sky is blocked.

( A good thing )

The second reason is to lock out ( prohibit ) some functions while driving.
( A bad thing )

 

I had a feeling it was to "lock out" some functions while driving. I really don't care if it loses reception in a tunnel, I think I will try it out first without connecting that wire......

~John