12-28-2005, 05:03 PM
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#1
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AF Newbie
Join Date: Dec 2005
Location: Chesapeake, Virginia
Posts: 6
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Dead Speedo and Odometer...wasn't VSS...Please Help
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
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12-28-2005, 11:21 PM
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#2
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AF Fanatic
Join Date: Oct 2004
Location: Muskegon, Michigan
Posts: 2,835
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Re: Dead Speedo and Odometer...wasn't VSS...Please Help
cable driven speedo?
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12-28-2005, 11:28 PM
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#3
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AF Newbie
Join Date: Dec 2005
Location: Chesapeake, Virginia
Posts: 6
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Re: Re: Dead Speedo and Odometer...wasn't VSS...Please Help
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Originally Posted by dmbrisket 51
cable driven speedo?
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Speed sensor...electronic.
Jon
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12-28-2005, 11:39 PM
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#4
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AF Fanatic
Join Date: Oct 2004
Location: Muskegon, Michigan
Posts: 2,835
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Re: Dead Speedo and Odometer...wasn't VSS...Please Help
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
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12-28-2005, 11:42 PM
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#5
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AF Newbie
Join Date: Dec 2005
Location: Chesapeake, Virginia
Posts: 6
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Re: Re: Dead Speedo and Odometer...wasn't VSS...Please Help
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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
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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
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12-28-2005, 11:51 PM
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#6
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AF Fanatic
Join Date: Oct 2004
Location: Muskegon, Michigan
Posts: 2,835
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Re: Dead Speedo and Odometer...wasn't VSS...Please Help
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?
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12-29-2005, 06:23 AM
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#7
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AF Enthusiast
Join Date: Jun 2003
Location: Pittsburgh, Pennsylvania
Posts: 3,552
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Have you taken a look at the DRAC module?
__________________
 
95 s10 Blazer, EGR Mod, ZQ8 Steering box mod, 99 Center console shifter mod and more... See everything at www.pghconsulting.net/teal
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12-29-2005, 09:08 AM
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#8
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AF Newbie
Join Date: Dec 2005
Location: Chesapeake, Virginia
Posts: 6
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Re: Dead Speedo and Odometer...wasn't VSS...Please Help
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Originally Posted by rlith
Have you taken a look at the DRAC module?
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No I haven't...where/what is is?
Jon
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12-29-2005, 09:12 AM
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#9
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AF Enthusiast
Join Date: Jun 2003
Location: Pittsburgh, Pennsylvania
Posts: 3,552
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Re: Dead Speedo and Odometer...wasn't VSS...Please Help
The DRAC module is attached to your ECM under the dash. Essentially it converts the signal from your VSS to work with your speedo
__________________
95 s10 Blazer, EGR Mod, ZQ8 Steering box mod, 99 Center console shifter mod and more... See everything at www.pghconsulting.net/teal
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12-29-2005, 06:15 PM
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#10
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AF Newbie
Join Date: Dec 2005
Location: Chesapeake, Virginia
Posts: 6
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Re: Re: Dead Speedo and Odometer...wasn't VSS...Please Help
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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
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Is there a way to test it without replacing it?
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12-29-2005, 09:04 PM
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#11
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AF Enthusiast
Join Date: Jun 2003
Location: Pittsburgh, Pennsylvania
Posts: 3,552
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Re: Re: Re: Dead Speedo and Odometer...wasn't VSS...Please Help
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Originally Posted by fenderman33
Is there a way to test it without replacing it?
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You can take it apart and meter everything in it based on the coding of the caps, resistors, et-al
__________________
95 s10 Blazer, EGR Mod, ZQ8 Steering box mod, 99 Center console shifter mod and more... See everything at www.pghconsulting.net/teal
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