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Tachometer Inoperative

WARNING: This page is about a different car, the 1995 Jeep Grand Cherokee. However, it is still accessible from the selected car via links, so may be relevant.
  1. With engine running, check for tachometer signal at pin No. 43 of PCM. See the TACHOMETER CALIBRATION  in this article. Also, see Figure . If signal is correct, go to next step. If signal is not correct, replace PCM.
  2. Disconnect negative battery cable. Unplug PCM connector. Remove dash pad and cluster assembly. Disconnect printed circuit and transmission control module ( if equipped) connectors.
  3. Probe cavity D5 of printed circuit connector. Check for continuity to ground. If there is continuity, go to next step. If there is no continuity, repair short circuit as required. See Figure .
  4. Still probing cavity D5 of printed circuit connector, check for continuity to cavity 43 of PCM connector. If there is continuity, replace tachometer. If there is no continuity, repair open circuit as required.
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