Dead Speedo and Odometer...wasn't VSS...Please Help

fenderman33 · #1 12-28-2005, 06:03 PM

I have a 93 S10 pickup, 2wd 2.5.
The speedometer and the odometer haven't worked since I got the truck. I put in a new speed sensor today and it didn't fix it. I pulled the gauge cluster and jumped the speedo pin to ground and got a reading, so I know the needle works, I'm just not getting any signal from the sensor. I checked voltage at the sensor and didn't have anything. Checked the wires from it to the fire wall and they looked good. What am I missing? I'd appreciate any help.
Thanks,
Jon

dmbrisket 51 · #2 12-29-2005, 12:21 AM

cable driven speedo?

fenderman33 · #3 12-29-2005, 12:28 AM

Quote:

Originally Posted by dmbrisket 51

cable driven speedo?

Speed sensor...electronic.
Jon

dmbrisket 51 · #4 12-29-2005, 12:39 AM

the last one i seen, was a clipped wire from poor machanics work, happend to be the 5 v signel wire, have to hunt for it, took us hours in the shop to find it on the hoist

fenderman33 · #5 12-29-2005, 12:42 AM

Quote:

Originally Posted by dmbrisket 51

the last one i seen, was a clipped wire from poor machanics work, happend to be the 5 v signel wire, have to hunt for it, took us hours in the shop to find it on the hoist

Where do the wires for it run from inside the cab? I can see them from the firewall to the sensor, but not under the dash. If I knew where to trace I could trace. Are there any other things it could be?
Thanks,
Jon

dmbrisket 51 · #6 12-29-2005, 12:51 AM

could be lots of things from a pinched wire to a bad ecm/pcm circut, how does the cv ring look? chewed up or nice?

rlith · #7 12-29-2005, 07:23 AM

Have you taken a look at the DRAC module?

fenderman33 · #8 12-29-2005, 10:08 AM

Quote:

Originally Posted by rlith

Have you taken a look at the DRAC module?

No I haven't...where/what is is?
Jon

rlith · #9 12-29-2005, 10:12 AM

The DRAC module is attached to your ECM under the dash. Essentially it converts the signal from your VSS to work with your speedo

fenderman33 · #10 12-29-2005, 07:15 PM

Quote:

Originally Posted by rlith

The DRAC module is attached to your ECM under the dash. Essentially it converts the signal from your VSS to work with your speedo

Is there a way to test it without replacing it?

rlith · #11 12-29-2005, 10:04 PM

Quote:

Originally Posted by fenderman33

Is there a way to test it without replacing it?

You can take it apart and meter everything in it based on the coding of the caps, resistors, et-al

POST REPLY TO THIS THREAD