my nav goes when i stop

I HAVE A  ECLIPSE AVN5500  THAT I PUT IN MYSELF ( PART OF THE PROBLEM, LOL)  i own a 2003 Tahoe and i ran the VSS wire i ran all the way to the ECM (GREEN/ blk wire) via what i was told to do by a local shop... it worked!, however , when i turn on the GPS/NAV, it shows when im moving, the problem is ...when i stop.. it keeps moving ...slow.. and if i turn, it usually goes to the next block and then corrects itself, but never stops whn i do..... where did i go wrong ??? i did NOT use a  GMOS-01, i used a different harness..i lost my ONSTAR.. no biggie but the guys at circuit city said if i used the GMOS-01 it has the VSS wire... if i get that will that fix the "not stopping issue"   ??  or can i "tap" into a wire behind the cluster somewhere and will it WORK RIGHT ???  HELP ! Any correct info is appreciated !

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HEYSATELLITEDUDE

Speed Sense          DARK GREEN / WHITE          (AC)          RADIO HARNESS

Maybe the GREEN/ Black wire has you tapped into the soul of the vehicle and it is showing you that it does not want to stop.

where is the dark green and white wire located ?

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HEYSATELLITEDUDE

It is in the factory radio harness.

It may not be in the radio harness on a Tahoe, only certain trim levels have it. Worse case it ain't there, remove the 4 7mm bolts on the cluster and remove it- it's in the plug for the speedo....

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Mike M2
Tech Manager
CS Dealer Services

i am an idiot wrote:

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Speed Sense          DARK GREEN / WHITE          (AC)          RADIO HARNESS

Maybe the GREEN/ Black wire has you tapped into the soul of the vehicle and it is showing you that it does not want to stop.

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That would be impossible, GM sold off their souls in the late 90s.....

Thats really funny.

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Kevin Pierson

KPierson wrote:

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That would be impossible, GM sold off their souls in the late 90s.....

Thats really funny.

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The company as a whole did as are speaking of.  However there have been many Rebellious Employees who claim they never got the memo.  So there are still a few new vehicles with a little soul.

ok, i took the radio back out, there are NO GREEN WIRES ON THE FACTORY HARNESS AND NO DARK GREEN WIRES ON THE CLUSTER someone told me i can use the one behind the dash.. there are 3 green with a white stripe so that didnt help... i also went to the light green /wht stripe and the PURPLE / BLACK stripe... directly on the tranny... NOTHING...... HEEEEELLLLLLPPPP!!!!!  do i honestly ned the            >>>                GMOS-01  ?????

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HEYSATELLITEDUDE

Find a volt meter that reads frequency and hook it up to the VSS wire and see what it is doing.  You can also use it to determine which is the correct wire behind the cluster.

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Kevin Pierson

nice.. one problem though,, i dont know where to find a meter that determines frequency for one.. #2 ... WHAT frequency am i looking for and 3rd..  i think there would be a easier way. people do this everyday, i KNOW THEY KNOW where the dang wire id, they just want me to pay them 150.00 to hook it up... isnt gonna happen. lol

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HEYSATELLITEDUDE

The meter does not need to be able to read frequency, simply set it to AC Volts (some meters will trigger on DC Volts instead of AC), ground the black lead and hold the red lead to the wire in question, the voltage should increase linearly with the speed of the vehicle if it is the VSS wire.

Craftsman has a meter for $30 that reads frequency - it's the 82344.

The VSS wire transmits speed data by pulsing every X feet traveled.  The faster the vehicle is traveling the higher the frequency due to the fact there are more pulses per second.  The key thing is that when the car is NOT moving the signal should NOT be pulsing. 

You can also test this with a standard volt meter if you drive really really slow, but it is much easier with a frequency meter.

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Kevin Pierson

i am an idiot wrote:

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The meter does not need to be able to read frequency, simply set it to AC Volts (some meters will trigger on DC Volts instead of AC), ground the black lead and hold the red lead to the wire in question, the voltage should increase linearly with the speed of the vehicle if it is the VSS wire.

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Using the right tool for the job will yield much better results. 

You use the AC setting of meters to measure AC voltages. 

You use the frequency setting of meters to measure frequencys. 

The VSS is a DC frequency, not an AC voltage.

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Kevin Pierson

Indeed, use DC and connect as stated above. The wire DEFINATELY on the back of the speedometer and is DEFINATELY GREEN / WHITE. Put the car in gear and go SLOW. every few yards the meter will pulse 12volts. Thats how it's done. You could simply try them all if you wish. Connect to one, go for a ride, try another until it works. There's no question about where the wire is tho...

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Mike M2
Tech Manager
CS Dealer Services

i found the wire. its on the cluster, top row and the third from  right to left.  it works fine and THANK YOU TO ALL THAT HELPED !! I install for DIRECTV AND DISH, becoming certified in WILDBLUE, if you need anything, let me know, email me at wizoncable@aol.com  ..AGAIN< THANKS ALOT !

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HEYSATELLITEDUDE

my email is actually pi ** on cable at aol . com no spaces.. it edits it . lol

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HEYSATELLITEDUDE