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Test B (Wiper Motor Module): Century

  1. Disconnect rear wiper motor module. Turn ignition switch to RUN position. Move rear wiper/washer switch to WIPE position. Ensure tailgate is closed. Measure voltage between wiper motor module connector terminal "A" (Orange/Black wire) and ground. If battery voltage is present, go to next step. If battery voltage is not present, check Orange/Black wire for open.
  2. Measure voltage between rear wiper motor module connector terminal "A" (Orange/Black wire) and terminal "B" (Black wire). If battery voltage is present, go to next step. If battery voltage is not present, check Black wire for open to ground.
  3. Measure voltage between rear wiper motor module connector terminal "C" (Gray/Black wire) and ground. If battery voltage is present, go to next step. If battery voltage is not present, check tailgate lock switch, Gray wire and Gray/Black wire for open(s).
  4. Remove rear wiper motor module. See WIPER MOTOR MODULE  under REMOVAL & INSTALLATION. Apply battery voltage to wiper motor module connector terminals "A" and "D". See Figure . Ground terminal "C". Motor should run. If motor runs, go to next step. If motor does not run, replace wiper motor module.
  5. Apply battery voltage to terminal "B". Ground terminal "C". Motor should park. If motor does not park, replace wiper motor module.
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