1998 Oldsmobile Cutlass BaseFACTORY OEM SERVICE PROCEDURE

Left Front Window Does Not Operate

  1. Turn ignition switch to RUN position. Using test light connected to ground, backprobe master window switch connector C2, terminal "B" (Gray wire). See Figure . Press left front window switch at master window switch to DOWN position. If test light illuminates, go to next step. If test light does not illuminate, go to step 6).
  2. Using test light connected to battery voltage, backprobe master window switch connector C2, terminal "B" (Gray wire). Press left front switch on master window switch to UP position. If test light illuminates, go to next step. If test light does not illuminate, go to step 6).
  3. Using test light connected to ground, backprobe master window switch connector C2, terminal "F" (Dark Blue wire). Press left front switch on master window switch to UP position. If test light illuminates, go to next step. If test light does not illuminate, go to step 6).
  4. Using test light connected to battery voltage, backprobe master window switch connector C2, terminal "F" (Dark Blue wire). If test light illuminates, go to next step. If test light does not illuminate, go to step 6).
  5. Disconnect master window motor. Connect test light between ground and power window motor harness connector terminal "B" (Dark Blue wire). Press left front window switch on master window switch to UP position. If test light illuminates, go to step 7). If test light does not illuminate, go to step 8).
  6. Replace master window switch. Recheck system operation.
  7. Connect test light between ground and master window switch connector terminal "A" (Gray wire). Press left front window switch on master window switch to DOWN position. If test light illuminates, go tostep 9). If test light does not illuminate, go to step 10).
  8. Repair open in Dark Blue wire between left front window motor and master window switch. Recheck system operation.
  9. Replace left front window motor. Recheck system operation.
  10. Repair open in Gray wire between left front window motor and master window switch. Recheck system operation.
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

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