Odometer not working

tropical36 · 11-17-2007, 01:56 PM

Odometer is not registering, but everything else works including the speedo....
The odometer is analog or mechanical..and looks just like the older ones that have a cable, except that it DOES NOT..
It will sometimes go forward a tenth or two and maybe go backwards about the same, but mostly does nothing...like maybe it has a stripped gear or something...
So, the question is...does this sound like a dash panel problem...a wiring problem...or is there a sensor somewhere on the tranny that needs looked at?...I would really like to know where and what the sensor might look like....to eliminate that possibility...

tropical36 · 11-17-2007, 01:56 PM

Odometer is not registering, but everything else works including the speedo....
The odometer is analog or mechanical..and looks just like the older ones that have a cable, except that it DOES NOT..
It will sometimes go forward a tenth or two and maybe go backwards about the same, but mostly does nothing...like maybe it has a stripped gear or something...
So, the question is...does this sound like a dash panel problem...a wiring problem...or is there a sensor somewhere on the tranny that needs looked at?...I would really like to know where and what the sensor might look like....to eliminate that possibility...

Clay L · 11-18-2007, 04:35 AM

As you said the display is mechanical, but is driven by an electronic circuit and in that year as I recall, a stepper motor.
It's pretty unusual for the mechanical part to fail but still possible.
It's much more likely to be a problem with the circuitry.
The same sensor that supplies the speedometer signal also supplies the odometer so it's not the sensor if the speedometer works properly.

I suspect the best thing to do is to take it out and see if you can get it repaired or replaced.

There might be a GM approved repair shop out there somewhere.

tropical36 · 11-18-2007, 05:03 AM

Clay L...
Thanks for that bit of information....I have found a repair facility, but didn't want to get too hasty about sending the dash panel off...and then finding out that the problem was elsewhere....
So, if I understand you correctly...you're saying that the signal only enters the motherboard on the back of the dash panel unit one time and there is not a second entry with another wire...that could possibily be coming from that same sensor...being disconnected, loose, or severed....

Clay L · 11-20-2007, 04:56 AM

I believe that there is only one wire from the sensor.
I think the sensor may connect to the engine computer and there may be a wire from the engine computer to the instrument panel/speedo/odo circuit, but I am not sure about the exact path.