Question about Saturn SL2

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1993 saturn sl sedan, manual trans.odometer does'nt work, speedometer does. i have the instrument cluster out of dash and see it has a printed circuit board. is there a wiring diagram you can come up with to start checking for which circuit to check for power or am i on the wrong track

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  • jeffmiller90 Sep 30, 2009




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Thanks for using FixYa. If the Speedometer is working then it means that all the information necessary for your ODO to calculate mileage is available.

On the PCB there is a speedo buffer, which translates electrical pulses into movement of the dial, or creates electrical pulses from a spinning cable, and translates to dial movement. Also check for a small white gear in the instrument cluster.

I’ll suggest you to check this and if that doesn't help then replace the odometer as it is quite old.
Please follow this procedure for removal & installation--
Removal procedure---

  1. Disconnect the negative battery cable.
  2. Remove the 2 instrument panel top cover screw caps and screws. Carefully remove the cover by lifting at the rear edge to disengage the retaining clips and by sliding the panel out of the windshield clips.
  3. Carefully remove the center air outlet/trim panel by pulling outward at the clip locations. Start at the bottom and move upward. Do not use tools that might damage the trim panel.
  4. Open the glove box, then remove the 4 cluster trim panel attaching screws from the top of the panel.
  5. Carefully pull the cluster trim panel rearward to disengage it from the retainers, then remove the CPA device and unplug the electrical connectors from the instrument panel lighting and rear window defogger switches. Remove the panel from the vehicle.
  6. Remove the instrument cluster retaining screws, then pull the cluster out sufficiently to unplug the electrical connectors. Unplug the connectors by depressing the retainer legs and remove the assembly.

Installation Procedure—

  1. Connect the wiring harnesses to the instrument cluster assembly.
  2. Verify that the connectors for the instrument panel lighting and rear window defogger switches are properly positioned, then install the instrument cluster assembly and retaining screws.
  3. Position the cluster trim panel and engage the electrical connectors to the panel lighting and rear defogger switches, then install the CPA devices.
  4. Install the cluster trim panel into the retainers, then secure using the retaining screws.
  5. Install the center air outlet/trim panel by pushing at the clip locations.
  6. Install the rear of the instrument panel top cover into the windshield clips and snap the panel into position. Install the upper panel screws and screw caps.

Please do accept the solution if the issue is resolved or else revert for further assistance.


Posted on Sep 30, 2009


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NOTE: Measurements must be made to the speedometer gauge pins that are inside the instrument cluster printed circuit clips.
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    Instrument Cluster Terminal Speedometer Gauge Pin C286-13 C287-1 S C287-2 G C288-7 BATT

  • Are the resistances less than 1 ohm?
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No INSTALL a new instrument cluster printed circuit. REFER to Instrument Cluster Printed Circuit . TEST the system for normal operation.
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